GE Industrial Solutions Entellisys Installation - Manual (Page 42)

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Entellisys Low Voltage Switchgear
Chapter 4. Equipment Installation
Power Cable Connections
Connect the main cables to the main lugs. Before any
main cable connections are made, the cables should be
identified to indicate their phase relationship with the
equipment. Adequate electrical and mechanical
clearances must be provided between conduit, cables, and
bus. Where the cables enter the section, they can be
lashed to optional cable supports at the rear of the cable
compartment as required. (See Fig. 3-20.)
Mechanical cable terminals are normally included with
the switchgear (compression terminals are supplied when
ordered) and are mounted at the ends of the breaker
runbacks in the cable compartment. Carefully follow the
cable manufacturer's recommendations for installation of
cable.
Install the cables in the proper path to the terminals,
using temporary lashing if required. Cut the cables to the
proper length. Strip the insulation to the desired
dimension, being careful not to damage any strands.
For copper cables, coat the wires with GE lubricating
grease D6A15A2, insert the cables into the terminals, and
tighten the set screws in accordance with torque values
shown in the torque value table for cable terminals in the
addendum of this manual. See Appendix A, Table A-2.
For aluminum cables, wire brush the wire strands
thoroughly. Immediately after wire brushing, coat the
cable strands with a quality oxide inhibiting compound
such as Penetrox A. Insert exposed wires into the
terminals and tighten the set screws in accordance with
values shown in the torque Table A-2 in Appendix A of
this Instruction Book.
CAUTION: The torque values shown in the table are
for dry threads only. Do not grease or otherwise
lubricate the threads on the cable terminals, as this
will permit over-tightening of the screw and possible
damage to the terminal or cable.
ATTENTION: Les valeurs de couple indiquées dans le
tableau ne sont valables que pour des filets secs
uniquement. Il ne faut pas graisser ou librifier
autrement les filets des câbles terminaux, car cela
produira un serrage excessif de la vis et possiblement
des dommages au terminal ou au câble.
This should result in the oozing of compound material
from between individual strands. Wipe off any excess
compound.
Bolt the cable terminal connectors to the ends of the bars
in the cable compartment. Non-oxidizing grease, such as
GE lubricating grease D6A15A2 furnished with each
lineup, should be used at these connection surfaces. The
bolts should be tightened with a torque of 35-40 ft-lbs.
Lash the cables securely to the cable support, if present, to
take their weight off the runbacks and to brace them
against short circuit forces in the event of a fault.