GE ABB ReliaGear LV SG Installation, Operation And Maintenance Manual page 27

I N S TA L L AT I O N , O P E R AT I O N S A N D M A I N T E N A N C E M A N U A L
—
A neutral bus, insulated from ground, is provided in
39
the bus area on switchgear designed for four-wire
Control wiring
termination trough
systems. The neutral bus is located either near the
top or near the bottom of the cable compartment.
—
It includes provisions for terminating the neutral
40
conductor of four-wire feeder cables and also
Cable termination
compartment
direct mounting of the neutral sensor as required
for those feeder system circuit breakers having a
ground fault trip function.
1
2
3
1. Internal equipment control wiring
2. Terminal boards
3. Space for purchaser's field control wiring
—
39
Ground bus
All ReliaGear LV SG sections are grounded to the
internal equipment ground bus, Figure 40, located
at the bottom or the top of the cable compartment.
2
3
1
4
1. Feeder run backs
2. Vertical riser bus covers
3. Horizontal main bus
4. Ground bus (behind steel cover)
—
40
26