2.9 Electrical Systems 2.9.1 General Considerations General Guidelines Intent
2.9 Electrical Systems 2.9.1 General Considerations General Guidelines Intent
2.9 Electrical Systems 2.9.1 General Considerations General Guidelines Intent
9 Electrical Systems
General Guidelines
Intent
This section provides the primary considerations for electrical design,
including codes and standards as well as regulatory agency requirements.
Resources
Campus Physical Plant and Facilities Planning and Construction professionals
are available for consultation regarding policies, procedures, and normally
accepted practices for electrical design work at the university.
All electrical design should conform to the requirements of the latest edition of
the following:
Documentation
Plans and specifications should include sufficient detail to explain
electrical designs to the extent required to avoid problems, conflicts,
and questions during construction. The documents should also be
prepared for use by operating and design personnel for reference
to as-built conditions following completion of construction.
Design Criteria
Safety, reliability, and energy conservation should be the designer's
prime considerations in the design and specification of all electrical
equipment and wiring on the campus.
The designer must take every effort to protect the university landscape
and avoid disturbance of any area within the drip line of trees when
routing underground lines. Detailed landscape specifications and
guidelines are included within this document for reference.
General Guidelines
Intent
This section describes the method and source of electrical power
distribution to the Main Campus.
Design Criteria
The university Main Campus is supplied electrical power from
Carolina Power and Light Company at one point of delivery.
The university operates and maintains its own distribution system. It is
installed primary in an underground conduit and manhole system.
A diagram showing primary distribution design is available from Facilities Planning and
Construction.
General Guidelines
Intent
This section describes the primary electrical power distribution systems
For the campus.
Design Criteria
All operations of primary voltage switches on the existing campus electrical
distribution system will be performed by the owner. Any requests for
switching should be made to the university construction manager 48 hours
in advance. Primary switch gear preferred manufacturer is S&C.
The contractor should provide all grounding locks, signs, and other safety
equipment that may be required. The contractor must solidly ground all
high-voltage circuit conductors before starting work is being performed.
The contractor should remove all locks, grounds, signs, and other
safety equipment after work is completed on primary equipment. All
new equipment should be operated by the contractor after system has
been inspected by owner.
All transformers should be protected by an individual load-break switch
device. Three-phase switch operation is preferred with current-limiting
fuses. Pad-mounted transformers should have distribution-type lightning
arrestors and should include suitable barriers to separate high-and low
voltage compartments. All transformers should be fused as nearly as
possible to 150% of transformer rating.
General Guidelines
Intent
This section describes the secondary electrical power distribution
systems for the campus.
Design Criteria
The secondaries of transformers should be rated at 120/208 volts three
phase, or 120/208 volts singe-phase, or 277/480 volts three-phase, or
277 volts single-phase (for banking at 277/480 volts), depending upon
the type of load served.
General Guidelines
Intent
This section describes the emergency generator and lighting systems
for the campus.
Resources
Designs for emergency generator and lighting systems shall comply
with the latest edition of the following North Carolina Department
of Insurance specifications:
Design Criteria
Emergency generator and lighting systems shall be provided to supply
power requirements for critical life safety support equipment and
emergency egress facilities. A portion (usually 10%) of the light
fixtures in common areas (hallways, restrooms, lobbies, stairwells,
entrances, exits, etc.) shall be served by the emergency power system
through unswitched circuits.
All exit lights are to be LED type. Only one fixture per bathroom
need be on the generator.
General Guidelines
Intent
This section will provide information on designing energy
efficient lighting systems.
Resources
EPA GreenLights recommendations
Documentation
The designer is required to provide the owner with as built and maintenance
information showing fixture manufacturers and model numbers and luminaire
manufacturer and model numbers for maintenance purposes.
Design Criteria
Follow EPA GreenLights recommendations and IES recommended
lighting levels.
Use highly efficient lighting systems that improve lighting and meet
the needs of the residents.
Use Instant Start ballast in all common areas (hallways, stairwells, etc.)
and where operation time is expected to be greater than or equal to 3 hours per
start. Use Rapid Start ballast for other areas.
Restrooms
Use ultrasonic or combination systems in restrooms or other
areas where applicable. Do not have manual light switches in
restrooms --system should be controlled entirely by automatic
controls. Keep one fixture in restroom on emergency circuit.
Other Areas
Any manual switches must be in series with controls.
General Guidelines
Intent
The primary purpose of the fire detection system is to alert the
Building occupants in the event of a fire. The design of the fire
Detection system should be considered on a case-by-case basis
Because the varied types of facilities and their use at the university.
Resources
Resources available to the designer include:
Documentation
Documentation shall include all details, drawings, and specifications
Necessary for a complete and functional fire detection system installation.
Design Criteria
The fire detection system will feature all equipment necessary to meet
All national, state, local, and university codes and requirements. The designer
Will be responsible for the design of a fire detection system that is fully
Serviceable by the university and can be U.L. certified as installed. The
System design fully comply with the suggested DOI fire alarm standards (latest edition).
All systems will be designed to be monitored by the University's off campus central
monitoring station, HolmesElectric Inc., of Fayetteville, NC. All new systems require
two phone lines coming into the dialer, and shall be included in the design work.
Annunciation of all building alarms shall occur in one central location, such as central
room, loading dock, or central entrance. Designers are required to take into account the
schedule of building operations in preparation of design specifications. Contractors must
work around the existing building operations schedule, unless otherwise agreed. All
wiring shall be concealed, or if unable to be concealed, in painted wiremold. Standard
shelf stock for devices shall be 10 percent of the total count.
2.9.8 Metering
General Guidelines
Intent
This section describes the requirements for metering system for the campus.
Design Criteria
All electrical installations are typically metered at the transformer for
KWH/KWD for utilities billing purposes. First priority should be to
meter from the switchgear. The contractor shall furnish and install
all pad-mounted transformer metering equipment, including meter,
meter base, current transformers, potential transformers, wiring, and
terminations.
General Guidelines
Intent
This section describes the requirements for electrical equipment
access and vaults for the campus.
Design Criteria
Each building or building complex should have a suitable transformer
installation, consisting of either an indoor vault or exterior pad
mounted transformer.
Indoor vaults should include a drain and sloped floor for oil and
water removal. A thermostatically controlled fan should be
included to accomplish positive cross-ventilation. Access to
indoor vaults should be from the building exterior via a 42"
minimum width opening.
General Guidelines
This section will provide guidance on the how emergency blue light phones are located
and specified.
Each new exterior project shall consider the installation of additional blue light phones.
Designers shall work with UNCP Police to site phones.
Design Criteria
Units shall be manufacturered by Code Blue,Inc., Base Model CB5, Phone Model
CB3000. Designers shall specify the installation of phone and power conduit to the unit,
along with locating the source for power and phone service. Both services shall be
provided in the provided by the contractor , not handled as by the owner at a later date.