GE Industrial Solutions Entellisys Installation - Manual (Page 41)

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Entellisys Low Voltage Switchgear
Chapter 4. Equipment Installation
Busway Connections
Busway runs must be aligned with openings in the
equipment and connected to the mating components
electrically and mechanically. A collar is mounted on the top
of the equipment cable compartment to which is bolted the
busway housing. See Fig. 4-16. The 1/4-20 NC bolts,
washers, and nuts for this mechanical connection are
supplied with the busway stub. The bolts should be
tightened with a torque of 7-9 ft-lbs.
Fig. 4-16. Spectra Series™ Busway mounting (front-entry)
The power conductors in the busway stub are designed to bolt
directly to power connector blocks mounted on the switchgear
riser bus bars. These connections are made with 1/2-13 NC
bolts supplied with the switchgear equipment.
NOTE: To maintain the minimum contact resistance
across bolted bus joints, it is recommended that the joint
contact surfaces be coated with a film of GE lubricating
grease D6A15A2. A can of this grease is supplied with the
equipment. Do not put grease on the bolt threads, as this
will affect the clamping force exerted by the bolt.
NOTE: Afin de maintenir une résistance de contact
minimale à travers les joints vissés des barres omnibus,
nous recommandons que les surfaces du joint de contact
soient unduites d’une pellicule de graisse lubrifiante GE
D6A15A2. L’équipement est fourni avec une boîte de cette
graisse. Il ne faut pas graisser les fils des boulons car la
force de serrage exercée par le boulon en sera affectée.
The recommended torque for tightening the 1/2-13 NC bolts
connecting the busway stub conductions to the riser bus
power connectors is 35-40 ft-lbs.
Control Wire Connections
For external control wiring, refer to Fig. 4-17 for switchgear
cable area dimensions, and connect the control wires to the
switchgear section as follows:
1. When control conduits enter the switchgear from below,
they should not extend more than one inch above the
floor. The control wires may be pulled through the
conduits before or after the switchgear is installed.
Fig. 4-17. Floor plan and cable entry space
2.
Route the control wires from the conduits through the
wiring trough (cross-hatched area- 2" x 7"-shown on
Fig. 4-17) at the side of the cable compartment.
Connect the cables to the terminal blocks in accordance
with the connection diagrams for the equipment. Refer
to the equipment frontview / floorplan drawings for
location of terminal blocks for external control wiring.
3. If the control conduits enter from above, remove the
top plate from the switchgear and drill the top cover
within the available space indicated. See Fig. 4-17.
Control wires should be routed to the wiring trough
and connected to the terminal blocks as described
previously.