GE Industrial Solutions Entellisys Low Voltage Switchgear - Manuel (Page 30)

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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 connections 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.
2. Route the control wires from the conduits through the wiring
trough (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.
3. If the control conduits enter from above, 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.
Fig. 4-17. Floor plan and cable entry space
Equipment
Depth “A”
Direction
of Leads B
60” Below 19
Above 24
67” Below 26
Above 31
74” Below 33
Above 38
Table 4.17 Floor Plan