Mauritius Institute of Training & Development Knowledge Based Training Centre
Mauritius Institute of Training & Development Knowledge Based Training Centre
Mauritius Institute of Training & Development Knowledge Based Training Centre
Draw a plan for an electrical installation showing the position of all openings and
fittings as per customers requirements.
Calculate the size of cables from load requirements taking into consideration
the following:-
ZONE
Capacity of appliances
Number of fittings
Diversity factor (off-peak control)
ITEM
Am ps
D iv e r s ity
F a c to r
A m p s a fte r
d iv e r s ity
fa c to r
A m ps per
Zone
C ir c u it B r e a k e r
Am ps
C a b 2l e S i z e
m m
W a tt
24.2
KITCHEN
LOBBY /
BATHROOM
2000
3000
1000
2000
8.7
13.0
4.3
8.7
0.5
0.5
0.5
0.5
20 +
RCD
Spare sockets SK2 & SK3
1000 4.3 0.5 2.2 12.5 30mA
CFL lamps L1-L20
800 3.5 0.75 2.6 2.6 6
MAINS INCOMING SUPPLY RATING (Amps)= 51.0 63
2500 10.9 0.5
5.4
2.5
2.5
1.5
1.0 from switch to each lamp
6 on perforated cable tray
24.3
Job Name:
Location:
Effective Dates of Plan Start:
End:
Work To Be Performed by
Person in Charge:
Phone:
Description of Work:
Originator:
Yes
No
Date:
Approvals as Required by ES&H Manual, Chapter 8, Electrical Safety (Sign, print name and title, and
date):
Participants (All workers to read, sign, print name and date):
24.4
If the only work is the relocation of the electrical equipment using existing
conductors the requirements that would apply are the:
(a) fixing and location of the electrical equipment;
(b) mechanical protection for the cables in the new location.
State the procedure for ensuring proper laying of cables in partitioning walls.
Fiber optic cables should be protected with heat shrink cap. When data cables
are delivered in winter cable reels that were exposed to temperatures below zero
for a long time should be left to acclimatize in a warmer environment before they
are unrolled and installed. Remember that receiving inspection is the first step of
the quality process. This inspection should include: cable quantity, part number
verification, recording of cable quality traceability identifiers (production lot,
batch, and production date) and possibly verifying functionality by creating a
sample link to be tested according to standards. Remember that before any testing,
you should allow two or three days for the cable to relieve the stress of lay down or
pulling operation.
Cable tie guns or similar tools may not be used when fastening various types of
cables, nor may they be used when fastening cable ties to provide connection
module strain relief.
No pressure may be exerted on the cables because of improper tying from using
quick cable installers or cable ties. The basic principle is that the geometry of the
cable jacket must not change.
Cable channels must be closed after work has been completed (raised floors, wall
ducts, etc.) to avoid dirt and damage caused by third parties.
People should be prevented from stepping on the cables. Pressure points cause
deterioration of the electrical transmission properties of the installation cables.
Data cables are sensitive to direct sources of heat: hot air blowers or gas burners
used for installing shrink tubing must not be used in the vicinity of data cables.
If chemicals are used to facilitate cable pulling, be sure they are compatible with
the cable sheet material. This is also applicable to any chemical (mostly spray
type) used for other types of cables that may accidentally get in contact with data
cables.
24.6
State the importance of making good (re-instate) after completion of work on site.
To verify that all components and equipments are in good running condition.
To verify that there is no loose connection by continuity test.
To verify faulty components this can damage the installation or endanger the
life of end users.
To verify that all norms and standards have been respected. (eg IEE
regulations).
24.7
Skills
24.8
24.9
24.10
24.11
24.12
24.13
24.14
Carry out inspection and testing as per current regulations and standards
and implement corrective actions.
24.15
24.16