GE Industrial Solutions Entellisys Low Voltage Switchgear - Manuel (Page 20)

20
1. Cable lugs - mechanical type
Fig. 3-19. Cable termination provisions
When furnished, the terminal boards (2), Fig. 3-20, for such
connections are located in an enclosed vertical wiring trough
mounted on the side of the cable compartment. The trough is of
steel construction with bolted covers to provide an isolation
barrier between the control wiring (1) and the adjacent power
cables.
A neutral bus, insulated from ground, is provided in the bus area
on switchgear designed for four-wire systems. The neutral bus is
located near the top of the cable compartment. It includes
provisions for terminating the neutral conductor of four-wire
feeder cables and also direct mounting of the neutral CT as
required for those feeder system circuit breakers having a ground
fault trip function.
1. Internal equipment control wiring
2. Terminal boards
3. Space for purchaser's field control wiring
Fig. 3-20. Control wiring termination trough
3-11 Ground Bus
All General Electric Entellisys switchgear sections are grounded to
the internal equipment ground bus (4), Fig. 3-21, located at the
bottom of the cable compartment.
1. Feeder runbacks
2. Vertical riser bus covers
3. Horizontal main bus
4. Ground bus (behind steel cover)
Fig. 3-21. Cable termination compartment
1
2
3
1
3
4
2
1