PAK-SU-1701-A Electrical Requirements For Packaged Equipment

PAK-SU-1701-A
Electrical Requirements for Packaged Equipment
Operating Environment: Topsides, Onshore
This document is the confidential property of Chevron U.S.A. Inc. Neither the whole nor any part of this
document may be disclosed to any third party without the prior written consent of Chevron U.S.A. Inc.
Neither the whole nor any part of this document may be reproduced, stored in any retrieval system, or
transmitted in any form or by any means (electronic, mechanical, reprographic, recording, or otherwise)
without the prior written consent of Chevron U.S.A. Inc.
Rev. Date Description Author Technology Leader

— 10/06 Initial release. J. Offutt J. Offutt
— 01/10 (E) References to ELC-SU-12.03 changed to n/a n/a
DRI-SU-1824. No technical content change.
08/10 (E) References to ELC-SU-12.23 changed to
ELC-SU-4744. No technical content change.
References to ELC-SU-12.02 changed to
08/11 (E) ELC-SU-1202. No technical content change.
A 08/13 Major revision; greater than 50% rewrite. M. Fousha K. Concienne
Document number changed from
PAK-SU-17.01. Some content is reproduced
and used under PIP’s membership
agreement.
August 2013 © 2006–2013 Chevron U.S.A. Inc. All rights reserved. Confidential – Restricted Access 1 of 21
Electrical Requirements for Packaged Equipment PAK-SU-1701-A
Summary of Changes
1. Revised technical content is indicated by change bars in the right margin.
2. Added, deleted, moved, and combined items are listed below.
Initial Rev. A Description Type of Change

Release
Major revision; greater than 50% rewrite.
Changes not tracked.
Contents
1.0 Scope............................................................................................................................................... 4
2.0 References ...................................................................................................................................... 4
2.1 Purchaser Documents......................................................................................................... 4
2.2 Industry Codes and Standards ........................................................................................... 5
2.3 Conflict Resolution and Order of Precedence .................................................................... 5
3.0 Terminology .................................................................................................................................... 5
3.1 Acronyms ............................................................................................................................ 5
3.2 Definitions ........................................................................................................................... 6
4.0 Service Conditions......................................................................................................................... 6
5.0 Design and Material Requirements .............................................................................................. 7
5.1 General ............................................................................................................................... 7
5.2 Motors ................................................................................................................................. 8
5.3 Enclosures and Junction Boxes .......................................................................................... 8
5.4 Control Stations and Indicating Lights ................................................................................ 9
5.5 Control Panels ................................................................................................................... 10
5.6 Separation of Circuits ........................................................................................................ 10
6.0 Fabrication Requirements ........................................................................................................... 12
6.1 General ............................................................................................................................. 12
6.2 Wiring Methods ................................................................................................................. 12
6.3 Grounding ......................................................................................................................... 14
6.4 Color Coding ..................................................................................................................... 15
7.0 Nameplates and Labeling ............................................................................................................ 16
8.0 Testing........................................................................................................................................... 17
9.0 Documentation ............................................................................................................................. 18
9.1 Documentation Content .................................................................................................... 18
9.2 Supplier Drawing and Data Requirements ....................................................................... 20
10.0 Shipment and Handling ............................................................................................................... 21
1.0 Scope
This specification covers the requirements for design and installation of electrical systems and
equipment installed on unitized skids or packages.
1. Included in the scope of this specification are electrical enclosures and junction boxes,
motors, motor controllers, controls and control panels, control stations, pilot devices,
indicating lights, wiring, and cable trays.
2. This specification must be used with other specifications in order to describe a complete
package.
3. Some content is reproduced and used under PIP’s membership agreement.
2.0 References
1. The following documents are referenced herein and are considered part of this specification.
2. Unless otherwise specified in Section 2.1 or Section 2.2, use the latest edition of the
referenced documents.
2.1 Purchaser Documents

DRI-SU-1824 Squirrel-Cage Induction Motors Up To and Including 500
Horsepower—Exception to IEEE Standard 841, 2009
DRI-SU-3903 Form-Wound Squirrel-Cage Induction Motors 500 Horsepower and
Larger, Rated 2300 Volts and Above—Exception to API 541, 2004
DRI-SU-4814 General Purpose Form-Wound Squirrel-Cage Induction Motors 250 Hp
and Larger—Exception to API 547, 2005
ELC-DU-1201 General Electrical Design
ELC-SU-1202 General Requirements for Installation of Offshore Electrical Facilities
ELC-SU-1675 Installation of Electrical Facilities
ELC-SU-4744 Electrical Systems Checkout and Commissioning
ELC-DU-5135 General Electrical Design for Onshore Facilities
ICM-SU-1112 Checkout and Commissioning of Instrumentation
ICM-SU-1348 Instrument Control Panels
ICM-SU-1729 Instrumentation for Packaged Equipment
ICM-SU-5117 Instrument Junction Boxes
PAK-DS-1701 Data Sheet for Electrical Requirements for Packaged Equipment
SID-SU-5106 Safety in Designs
2.2 Industry Codes and Standards

American Institute of Steel Construction (AISC)
325 Steel Construction Manual

American Petroleum Institute (API)
RP 14F Design, Installation, and Maintenance of Electrical Systems for Fixed

and Floating Offshore Petroleum Facilities for Unclassified and Class 1,
Division 1 and Division 2 Locations
RP 540 Electrical Installations in Petroleum Processing Plants
Institute of Electrical and Electronic Engineers (IEEE)
1580 IEEE Recommended Practice for Marine Cable for Use on Shipboard
and Fixed or Floating Facilities
National Fire Protection Association (NFPA)
70 National Electrical Code (NEC)

496 Standard for Purged and Pressurized Enclosures for Electrical
Equipment
Underwriters Laboratories (UL)
1309 UL Standard for Safety Marine Shipboard Cable
2.3 Conflict Resolution and Order of Precedence

1. Any conflicts among the referenced documents shall be identified to the Purchaser in writing
for resolution.
2. In general, when resolving conflicts, the following order of precedence shall apply:
a. Purchase order
b. One-line diagram, schematic drawings, interconnection drawings, and other associated
documents
c. Data sheet (PAK-DS-1701)
d. Other Purchaser drawings
e. This specification
f. Referenced industry codes and standards
3.0 Terminology
3.1 Acronyms
AVL Approved Vendor List
AWG American Wire Gauge
CAD Computer-Aided Design
CSA CSA International

CT Current Transformer
DXF Drawing Interchange Format
FM FM Approvals LLC
HP Horsepower
LED Light-Emitting Diode
NC Normally Closed
NO Normally Open
NRTL Nationally Recognized Testing Laboratory
PLC Programmable Logic Controller
RTD Resistance Temperature Device
TEFC Totally Enclosed Fan-Cooled
UL Underwriters Laboratories
3.2 Definitions
Medium voltage—Voltages above 600 volts and less than 35 kV.
Packaged equipment—One or more items of equipment, including ancillary and auxiliary
devices, that normally require engineering, assembly, piping, and wiring. Packaged equipment
can further be defined as having the following characteristics:
1. Can be stand-alone but usually designed and built to enable or support a primary process.
2. Generally shop-built, structurally integrated, and transportable as a unit.
3. Capable of operation once integrated with the main process piping and utilities.
4. Has a degree of operational complexity that may require a basic regulatory control system
and an alarm/shutdown system that monitors and protects its own performance and safety.
5. Employs a control system of sufficient complexity to require an engineered design.
4.0 Service Conditions

1. Equipment shall be designed to perform satisfactorily under the following service conditions
unless otherwise specified in PAK-DS-1701:
a. Ambient conditions within the limits of –18°F (-30°C) and +122°F (50°C)
b. Altitude of installation not exceeding 3300 feet (1000 m)
c. Humidity within the limits of 0–100 percent non-condensing
d. Seismic and wind forces as specified in the data sheet
e. Traces of chemical contamination as specified in the data sheet
2. The equipment shall be designed and be suitable for operation in a marine salt-laden
corrosive environment.
5.0 Design and Material Requirements

5.1 General
1. Design of package electrical systems shall be in accordance with ELC-DU-1201 or
ELC-SU-5135 (as marked under “Installation” in PAK-DS-1701), other technical
requirements of the project, NFPA 70 (the National Electrical Code [NEC]), and standard
engineering and industry practices.
2. Electrical systems and equipment shall be suitable for the NEC hazardous (classification)
location specified.
3. All electrical/electronic components and equipment shall be suitable and approved per the
NEC for use in NEC Class I, Group C and D, Division 2 classified areas, as a minimum.
4. Supplier shall furnish all materials except those designated as furnished by Purchaser.
5. All material shall be new and in accordance with the approved vendor list (AVL).
6. Specific manufacturer names and catalog numbers on drawings or specifications shall
indicate required material.
a. Supplier may quote alternate manufacturers of equal or better quality if they will provide
savings to Purchaser.
b. Substitution shall not be made except where authorized in writing by Purchaser.
c. It shall be Supplier’s responsibility to determine where substitution is required, obtain
Purchaser authorization, and procure any substitute material without postponing the job
completion date.
7. When indicated in the data sheet, all components and equipment shall be listed by a
nationally recognized testing laboratory (NRTL) accepted by Purchaser (currently
Underwriters Laboratories [UL], FM Approvals LLC [FM], or CSA International [CSA]) for
the intended service, and shall bear their label or listing.
a. Supplier shall submit to Purchaser for review and acceptance any electrical components
that are not listed or labeled by an NRTL.
b. The submittal shall provide sufficient data for the Purchaser’s evaluation of safety
aspects of devices on their own merits.
8. When Installation is marked “Topsides” in the data sheet, the only pre-accepted wiring
materials shall be metal clad type MC-HL cable with a gas/vapor-tight continuous aluminum
sheath and overall PVC jacket, and marine shipboard cable with cross-linked polyolefin
insulation, in accordance with IEEE 1580 Type P and UL 1309 Type X110 requirements,
and installed in cable tray as per API 14F.
9. When Installation is marked “Onshore” in the data sheet, the only pre-accepted wiring
materials shall be metal clad type MC-HL cable with a gas/vapor-tight continuous aluminum
sheath and overall PVC jacket installed in cable tray, and electrical conductors enclosed in
rigid galvanized steel conduit installed as per API 540. Allowing the use of conduit shall be
specifically indicated in the data sheet.
10. Mineral-insulated cable shall not be accepted unless specifically authorized by Purchaser.
11. Conduit shall not be used on packages, except inside buildings, unless marked as allowed in
the data sheet.
12. Owner or Purchaser shall provide main power and other interconnections to the package edge
as detailed on the layout and interconnection drawings.
13. Motor starters for package-mounted equipment shall be furnished by Purchaser in the motor
control center unless specified or detailed otherwise on the drawings.
14. Electrical devices within the package requiring external Purchaser connections (except
motor or feeder power leads) shall be wired by Supplier to terminal or junction boxes
designated on the layout and wiring drawings and located near the periphery of the packaged
equipment.
15. Equipment shall be installed to prevent interference with normal operation or maintenance
and shall comply with NEC Article 110 for working clearance, and with SID-SU-5106.
16. Where cabling (e.g., motor power and control cables) is specified to be provided by
Purchaser or others, Supplier shall provide empty cable trays running from the points of
cable connection at the equipment to the designated points on the skid edge.
17. All 120/208 VAC power or control systems shall be solidly grounded.
18. Energy-isolating devices (disconnecting switches, fuse blocks, circuit breakers, etc.) for
systems greater than 50 volts shall be suitable for locking in the Open or Off position only.
19. Hardware (bolts, nuts, etc.) shall be 316 stainless steel.
20. Instrument tubing installations shall be in accordance with ICM-SU-1729.
21. When space heaters are provided, the electrical connection points shall be accessible without
removing shipment packing.
5.2 Motors
1. Motors 3/4 horsepower (HP) or less shall be 115 VAC, single phase, totally enclosed
fan-cooled (TEFC), with no arcing or sparking contacts, and shall meet the requirements for
all hazardous locations except Class 1, Division 1. Explosion-proof rated motors shall be
supplied for Class 1, Division 1 locations.
2. Motors from 1 HP to 200 HP shall be 460 VAC, three phase, and shall meet the requirements
of DRI-SU-1824.
3. Motors greater than 200 HP shall be medium voltage and shall meet the applicable
requirements of DRI-SU-1824, DRI-SU-3903, or DRI-SU-4814. Motors that meet the
criteria requiring a motor in compliance with API 541 (DRI-SU-3903) shall be evaluated by
Purchaser prior to installation on a packaged equipment skid.
4. Composite motor power and control cables may be used where practical on motors
up to 60 HP. On larger motors separate power and control cables shall be used.
5. Motors 5 HP and larger shall be equipped with space heaters unless indicated otherwise in
the data sheet.
6. Motors shall not be mounted in a position where air flow is obstructed or where the hot air
discharge of one motor is directed at the air intake of another.
7. Minimum clearance, as required by the layout drawings or SID-SU-5106, shall be provided
at the fan end of TEFC motors to allow for proper air flow and motor removal.
5.3 Enclosures and Junction Boxes

1. Enclosures shall be NEMA 4X or NEMA 7 as required to meet the hazardous location
requirements as indicated in the data sheet.
a. NEMA 4X enclosures shall be 316 stainless steel
b. Enclosures shall be provided with 316 stainless steel hardware and hinges.
c. Junction boxes shall have hinged covers with captive-design cover fasteners.
2. Purging shall not be used to provide suitability for an enclosure or junction box to meet
hazardous (classification) location requirements unless otherwise specified in the data sheet.
Purging for suitability shall be in accordance with NFPA 496.
3. Enclosures shall have the manufacturer’s standard finish.
4. Enclosures and junction boxes shall be provided with breathers and drains to prevent the
accumulation of moisture.
5. Terminal strips for systems below 300 volts (instrumentation, control, low voltage power)
shall be in accordance with ICM-SU-5117.
a. For systems 300 volts and greater, power distribution blocks shall be used where power
terminations are required.
b. Terminal strips and terminal blocks shall be rated for the voltage and ampere service
involved.
6. Terminal strips shall be located in either a terminal box or a control cabinet located on the
packaged unit.
7. A central terminal strip for all Purchaser interconnect wiring terminations shall be provided.
The terminal blocks shall be permanently identified for Purchaser’s external connections.
8. Terminals shall be labeled with a white plastic strip suitable for the purpose.
9. Grounded metal or insulating barriers shall be provided between wiring or devices of
different voltages below 50V and wiring or devices from 50 volts to 300 volts. Wiring for
systems greater than 300 volts shall be in a separate enclosure from devices below 300 volts,
except for systems specifically designed for mixed voltages, such as motor controllers.
10. Enclosures with multiple voltage sources shall be provided with a warning nameplate.
11. Enclosures and junction boxes shall have a sufficient number of terminal blocks for
interconnecting wiring and an additional 20 percent spare terminal points.
12. Enclosures and junction boxes shall have bottom cable entry.
a. Side entry shall be permitted only with Purchaser acceptance.
b. Top entry shall not be allowed.
13. ICM-SU-5117 shall be referenced for additional requirements.
5.4 Control Stations and Indicating Lights

1. Unless otherwise specified in the data sheet, switches, control stations, and indicating lamps
shall be grouped together, arranged in a logical manner, and aligned with surrounding
members to present a finished installation.
a. Control stations shall be located within 5 feet (2 meters) of associated motor terminal
boxes, unless the skid size prevents compliance.
b. Control stations shall be installed to allow normal operation or maintenance and shall
comply with NEC Article 110 for working clearance, and with SID-SU-5106.
2. Indicating lights shall be high-brightness cluster-type light-emitting diode (LED) lamps.
3. Motor-indicating light colors shall be as specified in the data sheet.
5.5 Control Panels

1. Control panels shall be mounted on the equipment skid edge unless otherwise indicated in the
layout drawings.
2. Wiring for AC control circuits that operate below 300 volts and begin and end within the
panel shall be single-conductor stranded copper conductor with type THHN/THWN 600-volt
insulation.
3. Control panel wiring shall be done in a neat and professional manner and shall be tied and
secured in wireways.
a. Wiring shall be collected and gathered wherever possible.
b. Except for motor branch circuits serving motors up to 60 HP, control and power wiring
shall not be intermixed.
c. Interconnection between devices within an enclosure may be wired directly from device
to device, independently of terminal blocks.
4. Control panels with voltages above 50 volts shall be provided with external disconnects to
prevent access unless the disconnect is in the Off position. Control panels with multiple
external voltage sources shall be provided with a warning nameplate.
5. If specified by Purchaser, space heaters shall be provided for control panels.
a. Space heaters shall be rated at 240 volts and operated at 120 volts.
b. Unless specified otherwise in the data sheet, space heaters shall be controlled by an
adjustable thermostat and provided with an ammeter and a bypass push button for testing
the heater.
c. Any space heater that can reach 160°F (70°C) or higher shall be protected with an
expanded metal cage.
d. Necessary information on source of space heater power shall be conspicuously indicated
on the control panel.
6. ICM-SU-1348 may be referenced for additional requirements.
5.6 Separation of Circuits

1. Power and instrumentation wiring shall be run separately and terminated in separate
enclosures.
2. Power circuits and instrument signal circuits in parallel runs shall be installed with the
minimum separations indicated in Table 1.
3. Signal levels shall be defined as shown in Table 2.
4. Hand spacing of 6 inches (152 mm) shall be maintained between the top edge of a bottom
tray and the bottom edge of the top tray.
Table 1: Tray to Tray Spacing, in Inches (mm)
Signal Level Level 1 Level 2 Level 3 Level 4 Level 5
Level 1 0 1 (25) horiz 6 (152) horiz 26 (660) 26 (660)

12 (305) vert 6 (152) vert
Level 2 1 (25) horiz 0 6 (152) horiz 18 (457) 26 (660)

6 (152) vert 6 (152) vert
Level 3 6 (152) horiz 6 (152) horiz 0 6 (152) 12 (305)

6 (152) vert 6 (152) vert
Level 4 26 (660) 18 (457) 6 (152) 0 0
Level 5 26 (660) 26 (660) 12 (305) 0 0
Note: Spacing distance shall be between outside edges of tray horizontally or between top of bottom tray
and bottom of top tray vertically.
Table 2: Signal Levels for Different Types of Circuits
Signal Level Definition Examples
Level 0 Intrinsically safe systems.
Level Analog signals < 50 V Circuits to sensitive analog hardware (e.g., strain gauges,
1—High and digital signals < 15 V. thermocouples, vibration monitors).
Susceptibility Circuits associated with digital pulse signals.
Communication circuits.
Analog circuits to tachometers, vibration monitors,
resistance temperature devices (RTDs).
Level Switching analog and AC feeders < 20 amperes.

2—Power digital signals > 50 V, with Convenience outlets, lighting circuits, 50 to 250 V DC
Control currents < 20 amperes. relay and contactor coils.
Low-current ground detection circuits.
120 V control signals.
Circuit breaker coils < 20 amperes.
Level AC and DC circuits Feeders to three-phase motors and generators.

3—Small 0–480 V with currents Distribution circuits.
Power* > 50 amperes. Circuits to grounding impedances.

4—Medium > 1000 V, with currents Distribution circuits.
Power ≥ 200 amperes. Circuits to grounding impedances.

5—High > 1000 V or > 800 Large power feeder circuits.
Power amperes. Main power distribution system.
Circuits to grounding impedances.
* Control wires to motors rated 50 HP or less are normally considered to be Level 3 and may be routed in
the same cable or conduit as the power conductors to the motor.
6.0 Fabrication Requirements

6.1 General
1. Installation of the package electrical system shall be in accordance with ELC-SU-1202 for
topsides installations or ELC-SU-1675 for onshore installations as indicated in the data sheet,
and other technical requirements of the project, in particular the NEC and standard
installation practices.
2. Instrumentation, controls, and local control panels shall be completely piped, wired, and
tested, requiring connection only to external piping and wiring circuits for operation.
3. Enclosures and junction boxes shall have bottom cable entry.
a. Side entry shall be permitted only with Purchaser acceptance.
b. Top entry shall not be allowed.
4. Wiring entering enclosures shall be terminated on terminal blocks.
a. Terminal blocks shall be finger-safe.
b. On terminal blocks with Purchaser interconnections or terminations, Supplier shall use
only one side of the terminal block, leaving the remaining side for Purchaser
terminations. Terminals for Purchaser terminations shall be for one conductor only.
c. No more than two conductors shall be connected to any one terminal on a terminal strip.
d. If more than two conductors must be terminated at the same point on a terminal block,
the terminations shall be made on as many terminals as required, interconnected with
jumpers, which shall be physically separated from the conductors.
e. All conductors in an enclosure, including spares, shall be terminated.
f. A minimum of 20 percent spare terminals shall be provided.
g. Terminal blocks shall be labeled in accordance with the elementary and wiring diagrams
with a white plastic strip suitable for the purpose.
h. Owner or Purchaser connections shall be clearly identified.
5. When motor feeders are provided as part of the on-skid installation, motor terminations at the
motor controllers shall be terminated directly at the contactor terminals.
a. Power leads to motors shall be continuous from motor controller to motor terminal box.
b. Motor control wiring may be branched.
c. Motor feeder terminations at the motor terminal box shall use crimp-type connectors at
both motor terminal leads and source supply leads, bolted together with silicone-bronze
hardware, and insulated with Purchaser-accepted insulating means.
6.2 Wiring Methods

1. Wiring shall be sized for the service intended, and each end of each conductor shall be
permanently tagged in accordance with the elementary and wiring diagrams.
Heat-shrinkable-type wire marker shall be provided at both ends of wires.
2. Cables shall be supported to ensure that no weight is taken by the terminations.
3. Supplier shall install wiring and make connections to all items of equipment within the
confines of the equipment skid.
a. Wire shall be continuous from source to equipment. Splicing of wiring shall not be
permitted.
b. All electrical devices, enclosures, and equipment shall be securely mounted, adequately
supported, and completely wired.
c. Supplier shall install cable and cable tray or conduit for all on-skid cable installations to
motors, unit control panels, and junction boxes, including equipment or enclosures
supplied by Purchaser.
4. Minimum conductor size for power and lighting shall be No. 12 American Wire Gauge (AWG).
a. For motor control and for internal panel wiring, No. 14 AWG may be used.
b. The size of wire or cable conductors shall in no case be smaller than the size determined
from the 75°C ampacity tables in the NEC.
5. Control wiring shall be terminated on screw terminals with proper type compression lugs and
uninsulated ferrules, and shall be installed on terminal blocks with ferrule attachment tool.
6. Current transformer (CT) secondary circuits shall be minimum No. 10 AWG.
a. Two individual leads from each CT shall be wired to shorting-type terminal blocks.
b. CT circuits shall be provided with compression-type insulated-sleeve
seamless-ring-tongue connectors.
7. Ratchet-type crimpers shall be used to positively crimp all connectors.
8. A ground conductor shall be provided with all cables except instrument pairs/triads/quads,
which shall have individual shields, and the overall cable shall have a shield and drain.
9. Cable tray and channel shall be the accepted wiring support method for packaged equipment
and skids.
a. Conduit may be used if indicated on the data sheet or authorized by Purchaser.
b. Channel may not be acceptable in all locations or jurisdictions.
10. Cable tray shall be heavy-duty NEMA Class 20C (100 lbs/ft [149 kg/m] loading) and shall be
made of UV-resistant flame-retardant fiberglass or 316L stainless steel.
a. Cable tray shall be ladder-type construction with minimum 4-inch (102-mm) rail depth
and 9-inch (229-mm) spacing between rungs.
b. Other tray materials may be used when authorized in writing by Purchaser.
11. Cable channel shall be made of UV-resistant flame-retardant fiberglass or 316L stainless
steel.
12. Tray fittings shall be factory made and shall be identical to straight sections in materials and
strength.
a. Standard accessories such as splice plates, dropouts, end plates, barriers, and hold-down
hardware shall be factory made.
b. Hardware used to secure tray to tray supports shall be 316 stainless steel.
13. Separate cable tray systems shall be provided for power and control (120–480 VAC) and
instrumentation cables.
14. Type MC-HL cable or marine shipboard cable terminations shall be made with properly
sized connectors/terminators.
15. If using type MC-HL cable, Purchaser shall not accept EYS-type seal fittings in conjunction
with standard cable terminators in order to meet the area classification sealing requirements.
Sealing shall be integral with the terminator.
16. Conduit or cable entrances into junction boxes and control panels shall be made through
integral welded hubs or couplings. 316 stainless steel Myers-type hubs, complete with
grounding lugs may be used with Purchaser authorization.
17. Termination of conductors on equipment not supplied with terminal blocks shall be made
with lug-type connectors.
a. Connectors for wires No. 4 AWG and larger shall be made with copper
compression-type connectors.
b. Control wiring shall be terminated on screw terminals with proper-type compression
lugs and uninsulated ferrules, and shall be installed on terminal blocks with ferrule
attachment tool.
18. Liquid-tight, flexible metallic conduit, maximum length of 36 inches (0.9 m), shall be
employed at all apparatus or devices subject to vibration, movement for belt adjustments,
operational inspection, and maintenance.
6.3 Grounding
1. Electrical equipment and enclosures shall be effectively grounded to the supporting metal
frame according to the latest requirements of the NEC.
2. Two grounding pads or surfaces shall be provided on the skid structural steel or frame on
diagonally opposite corners for connection to grounding grid. The pads shall have NEMA
standard two-hole drilling with 9/16-inch (14.2-mm) diameter holes spaced 1 3/4 inches
(44.4 mm) apart.
3. Non-current-carrying parts of electrical equipment shall be bonded together and made
electrically continuous. Grounding lugs shall be provided inside the terminal boxes to
terminate the ground conductor.
4. Grounding conductors shall be soft drawn copper wires.
a. Exposed grounding conductors shall be minimum No. 2 AWG, rigidly supported, and
protected from mechanical damage.
b. Grounding conductors shall be bare or covered with green insulation.
c. Grounding conductors larger than No. 6 AWG may be insulated with other colors of
insulation provided they are stripped bare or taped green the entire length so as to
identify the conductor.
5. Power circuits shall include a green ground conductor with each circuit and shall not depend
upon the metal clad sheath or other raceway for the return path.
6. Motors shall be grounded to skid framing with an equipment grounding conductor of
No. 2 AWG or larger.
7. Where liquid-tight flexible metal conduit is installed, it shall comply with the following:
a. The maximum length and maximum unsupported flexible conduit length per conduit run
shall be 36 inches (0.9 m).
b. Minimum flexible conduit size shall be 3/4 inch (19 mm).
c. An internal grounding jumper shall be provided unless bonding is integral with the
flexible conduit and is listed as such.
d. An appropriately sized external ground wire with required grounding fittings may be
required and shall be installed in order to ground the system to the device.
8. Where nonmetallic enclosures are installed in the cable system, grounding fittings shall be
installed on the cable terminations, and an appropriately sized ground wire shall connect the
metal fittings together in order to maintain the ground continuity in the grounding system.
Nonmetallic enclosures may be bonded in this way integral with the casting itself.
6.4 Color Coding

Conductors shall be color coded for identification as shown in Table 3.
Table 3: Color Coding for Conductors
Service Wire Type Wire Color

Power and Lighting
Single Phase AC Hot Legs Black
Neutral White
Three Phase AC Phase A Black
Phase B Red
Phase C Blue
Neutral White
Motor Control (Note 1)
Stop Red
Start Blue
Common Yellow
Status/Pilot Light Orange
Interposing Relay Brown
Instrumentation and Control (Paired Cable) (Note 2)
DC+, Signal White
DC-, Signal (Return or Common) Black
Instrumentation and Control (Triad Cable)
DC+, Power Red
DC+, Signal White
DC-, Signal (Return or Common) Black
Service Wire Type Wire Color

Instrumentation and Control (Field Bus)
DC+ Brown
DC- Blue
Alarms
Switched Leg Black
Common White
Miscellaneous Control Orange, Yellow, and Brown
Equipment Ground Green or Bare
Note 1: The wire color coding for motor control is recommended. Most multi-conductor cables or
composite motor power and control cables are all black with numbered individual conductors.
Note 2: For programmable logic controller (PLC) digital inputs from Form C dry contact switches, the
white wire of paired cable shall connect the PLC positive terminal to the switch common. The black
wire shall connect the switched contact (normally open [NO] or normally closed [NC]) to the PLC
common or input terminal.
7.0 Nameplates and Labeling

1. Nameplates shall be made of 1/8 inch (3.2 mm)-thick laminated plastic with engraved
lettering a minimum of 1/4 inch (6.3 mm) high. Legends and instructions shall be in English
unless otherwise indicated in the data sheet or purchase order documents.
2. Nameplates shall be of the following background color and engraving:
a. Identification nameplates – White background with black engraving
b. Caution nameplates – Yellow background with black engraving
c. Warning nameplates – Red background with white engraving
3. Nameplates shall be attached with stainless steel screws that do not compromise enclosure
integrity. Adhesive-backed plastic labels shall not be used.
4. All electrical enclosures and equipment shall be identified with nameplates.
5. Electrical devices shall be provided with nameplates showing the equipment controlled and
device function.
6. Electrical equipment 50 volts and above shall have a nameplate identifying the power source.
7. Terminal strips, blocks, and wire numbers shall be clearly labeled.
a. Wire numbers shall be installed on each wire by use of permanently printed, white
heat-shrink tubing.
b. Wire identification shall agree with the identification shown on the wiring diagrams.
8. Motors that can be started automatically, started from another location, or that are equipped
with automatic reset overloads shall be provided with a warning sign to indicate that the
motor can start automatically.
9. Motors provided with space heater(s) shall be provided with a caution sign indicating “Space
heaters may be energized.” A nameplate defining the space heater power source shall be
provided on the motor in a conspicuous location.
10. The skid or package shall have an engraved 316 stainless steel nameplate showing the
following regarding the electrical features of the skid or package:
a. Nameplate shall be attached to the exterior of skid or package with stainless steel screws.
b. Nameplates shall show the following:
1) Purchaser’s purchase order reference number
2) Project number
3) Tag number
11. All components shipped separately shall have stainless steel nameplates stamped or engraved
with tag number, shop order number, and purchase order number.
8.0 Testing
1. Supplier shall perform electrical tests to ensure correct operation of the packaged equipment
in accordance with the requirements herein, ELC-SU-4744, and referenced specifications.
2. Additional testing may be required to meet overall testing requirements of the project.
3. Components shall be tested in accordance with any applicable standards and manufacturer’s
instructions or recommendations.
4. Supplier shall perform instrumentation and control system tests to ensure correct operation
of the packaged equipment in accordance with the requirements herein, ICM-SU-1112 or
ICM-SU-1729, and referenced specifications.
5. Whenever the skid or package is to be shipped in more than one piece, it shall be fully
assembled at Supplier’s plant and shall be tested with all components assembled.
6. Supplier shall submit a test plan to Purchaser a minimum of 45 days prior to testing. Testing
shall not begin until the test plan is reviewed and accepted by Owner and Purchaser.
7. Detailed check sheets for documenting the testing shall be developed as part of the test plan
submitted to Purchaser for acceptance.
8. Owner, Purchaser, or an authorized representative shall reserve the right to witness all
testing.
a. The Supplier shall notify the Owner and Purchaser, in writing, a minimum of 2 weeks
before testing is to proceed.
b. Supplier shall provide test reports for completed functional tests of equipment and
systems prior to scheduling witness testing.
9. Testing shall consist of, but not be limited to, the following procedures:
a. All devices shall be examined for broken parts, indication of shipping damage, and wire
connection tightness.
b. Point-to-point checks of all wiring shall be completed.
c. All circuits and equipment shall be tested for grounds, short circuits, and proper
functioning.
d. Insulation resistance and continuity tests shall be performed on all feeders, motor leads,
and control wiring. The test shall be performed between each conductor and ground.
e. Interlocking, control, and instrumentation wiring for each item or system shall be tested
point to point to ascertain that the system will function as indicated on the wiring or
schematic diagrams, description of operation, etc.
f. All interlockable safety devices and fail-safe functions shall be tested and verified.
g. Where necessary, manual operation of control devices such as limit switches shall be
used to simulate actual operating conditions in the checking of the system.
10. For Supplier-furnished equipment, all material shall be checked for proper voltage and
current ratings. Thermal overload elements for motors shall be checked and correctly
supplied, if necessary.
11. Motors shall be checked for proper operation. Any misalignment shall be corrected before
shipment.
9.0 Documentation
9.1 Documentation Content
1. Drawings for each skid or package electrical system shall have a unique number provided by
Purchaser.
2. Drawings shall have a space in the lower-right corner for Purchaser’s title block.
3. Engineering data shall be supplied according to requirements in Section 9.2 of this
document.
a. Typical drawings shall not be acceptable unless they are revised to show only the
relevant equipment.
b. The format for digital exchange of data shall be agreed between the Purchaser and
Supplier.
c. Data shall include that listed in Table 4 as a minimum.
4. Electrical drawings and details shall be prepared providing all information necessary for the
planning, installation, hook-up, testing, and commissioning of electrical systems.
a. Required connection points for package power and tie-in points to the platform control
system shall be clearly identified.
b. The following drawings and details (as applicable) shall be supplied as a minimum:
1) Electrical one-line diagrams
2) Detailed wiring diagrams showing the following information as a minimum:
i. Approximate physical location of all items
ii. Complete schematic diagram with item numbers corresponding to bill of
materials
iii. Junction box details and terminal strip layouts
iv. Wiring within each panel or enclosure
v. Interconnections between panels and enclosures
vi. Operation and contact arrangement of control relays
vii. Identification of all terminals, terminal blocks, and wires

viii. Cross-reference to bill of materials and other drawings
3) Cable and wiring schedules
4) Interconnect diagrams
5) Electrical calculations (cable sizing, short circuit analysis, breaker sizing, tray fill,
voltage drop, etc.)
6) Load list (including AC and DC load tabulations)
7) Electrical equipment data sheets
8) Supplier shall furnish the following information for all motors:
i. HP or kW
ii. Voltage
iii. Single phase or three phase
iv. Full-load amperes
v. Service factor
vi. Locked rotor amperes or code letter
vii. Speed
viii. Any other special information, such as operating considerations, interlocking
requirements, starting frequency, etc.
9) Supplier shall furnish the following information for loads other than motors:
i. Load in kW
ii. Voltage
iii. Single phase or three phase
iv. Any other special information, such as operating considerations, interlocking
requirements, etc.
10) Cable tray or conduit run drawings.
11) Complete priced spare parts list including those parts that the Supplier recommends
to be on hand during startup and first-year operation.
12) Bill of materials listing the location, quantity, rating, type, and manufacturer’s
catalog number of all equipment.
13) Installation, maintenance, and operating instructions covering all the equipment
furnished.
14) Engineering data including complete catalog data of instruments, switches, relays,
and other devices, plus application information.
9.2 Supplier Drawing and Data Requirements

1. Supplier shall provide one reproducible set of drawings plus the specified number of copies
of all documentation and operating manuals as indicated in the data sheet.
2. Reproducible drawings shall be computer-aided design (CAD)-convertible drawing
interchange format (DXF) electronic format, unless otherwise specified in the data sheet.
3. Data shall include that listed in Table 4 as a minimum.
Table 4: Supplier Drawing and Data Requirements (Some content used pursuant to PIP’s
membership agreement)
A B C D
With For Final As Description
Bid Review Certified Built
Detailed bill of materials with schematics identification,

X X X quantities, make, rating, model, components manufacturer
X Extended warranty information
X X Proposed layout of equipment showing estimated

dimensions and weights
General layout of equipment showing plan view, elevations,
sectional views, dimensions, weights, panels, device
X X X location; outline drawings showing final assembled
configuration; drawings showing locations of all equipment
and devices
Installation drawings showing dimensions and weights of all
X X X shipping sections and location and type of interconnections
between shipping sections
X X X X Motor and other load information (see Section 9.1, item 4)
X X Interconnection wiring
X X X Connection wiring diagrams for all electrical equipment
X X X One-line, three-line, and control schematic diagrams
Shipping description (no. of section, protection, etc.)
X Certified test reports
X Installation, operation, and maintenance manual
X Final as-built drawings
X Complete parts list
X Recommended priced spare parts list
A. Bidder to furnish these documents with proposal.

B. Supplier to furnish for Purchaser’s review and authorization to proceed before fabrication.
C. Supplier to furnish these documents as part of the final certified document submittal. Equipment to be
shipped with one set of installation, operation, and maintenance manuals.
D. As-built within 2 weeks following shipment.
10.0 Shipment and Handling

1. Preparation for shipment shall be in accordance with the equipment Supplier’s standards
unless otherwise noted in the data sheet, the request for quotation, or the purchase order.
2. The equipment Supplier shall be solely responsible for the preparation for shipment to ensure
that materials reach their destination in excellent working condition when handled by
commercial carrier systems.
3. When equipment is shipped in more than one section, Supplier shall identify each section
with a permanent, readily visible identification tag. Supplier shall provide all materials and
instructions required for reassembly of the sections in the field.
4. Instructions for storage (short term and long term) of equipment shall be attached to the
equipment.
5. When specified in the request for quotation or purchase order, provisions shall be made for
the Purchaser to energize the space heaters without uncrating the equipment during storage at
the job site. Electrical connections to the space heaters shall be readily accessible and clearly
identified.
6. Any component with moving parts that might be damaged in shipment shall have all such
moving parts securely blocked and braced.
7. Removable elements or items shipped separately from the equipment shall be clearly
identified with proper description and location of installation.
8. Equipment shipped in more than one section or container shall have each section or container
clearly identified with equipment description and section number.
9. Equipment shall be protected from weather elements and vibration during shipping and
storage.
10. Combination desiccant/corrosion packs shall be placed inside all control panels and junction
boxes prior to packing. Date of installation shall be clearly labeled.
11. Any blocking, bracing, or other material that must be removed before energizing the
equipment shall be clearly identified by high-visibility tags, signs, or markings.
12. Supplier shall ship one set of drawings and one set of installation, operation, and
maintenance manuals with the equipment.
13. Removable elements or items that are shipped separately shall be shipped in weathertight
packaging suitable for outdoor storage.
14. Each shipping section shall be furnished with removable lifting angles or plates suitable for
crane hooks or slings. Lifting angles and plates shall be fabricated for use with slings at no
less than 45 degrees.
15. The lifting lugs shall be designed so that they are not loaded beyond 33 percent of the basic
allowable stress, as defined in AISC 325, of the weakest part at any time during a lifting
operation.
16. If spreader bars are required for lifting, Supplier shall furnish them with the equipment.

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PAK-SU-1701-A

Electrical Requirements for Packaged Equipment

Operating Environment: Topsides, Onshore

Rev. Date Description Author Technology Leader

Initial Rev. A Description Type of Change

2.1 Purchaser Documents

2.2 Industry Codes and Standards

325 Steel Construction Manual

RP 14F Design, Installation, and Maintenance of Electrical Systems for Fixed

70 National Electrical Code (NEC)

1309 UL Standard for Safety Marine Shipboard Cable

2.3 Conflict Resolution and Order of Precedence

CSA CSA International

4.0 Service Conditions

5.0 Design and Material Requirements

5.3 Enclosures and Junction Boxes

5.4 Control Stations and Indicating Lights

5.5 Control Panels

5.6 Separation of Circuits

Table 1: Tray to Tray Spacing, in Inches (mm)

Signal Level Level 1 Level 2 Level 3 Level 4 Level 5

Level 1 0 1 (25) horiz 6 (152) horiz 26 (660) 26 (660)

Level 2 1 (25) horiz 0 6 (152) horiz 18 (457) 26 (660)

Level 3 6 (152) horiz 6 (152) horiz 0 6 (152) 12 (305)

Level 4 26 (660) 18 (457) 6 (152) 0 0

Level 5 26 (660) 26 (660) 12 (305) 0 0

Table 2: Signal Levels for Different Types of Circuits

Signal Level Definition Examples

Level 0 Intrinsically safe systems.

Level Switching analog and AC feeders < 20 amperes.

Level AC and DC circuits Feeders to three-phase motors and generators.

Level AC and DC circuits Feeders to three-phase motors and generators.

Level AC and DC circuits Feeders to three-phase motors and generators.

6.0 Fabrication Requirements

6.2 Wiring Methods

6.4 Color Coding

Table 3: Color Coding for Conductors

Service Wire Type Wire Color

DC+, Power Red

DC+, Signal White

DC-, Signal (Return or Common) Black

Service Wire Type Wire Color

7.0 Nameplates and Labeling

vii. Identification of all terminals, terminal blocks, and wires

9.2 Supplier Drawing and Data Requirements

Detailed bill of materials with schematics identification,

X X Proposed layout of equipment showing estimated

X X X Connection wiring diagrams for all electrical equipment

X X X One-line, three-line, and control schematic diagrams

Shipping description (no. of section, protection, etc.)

X Certified test reports

X Installation, operation, and maintenance manual

X Final as-built drawings

X Complete parts list

X Recommended priced spare parts list

A. Bidder to furnish these documents with proposal.

10.0 Shipment and Handling

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