Researching the requirements 25
Notes for Figure 1:
-
Ground conductor should be the same size as the largest conductor run
between the transformer and the AC panel.
Transformer (dedicated for SL-1 and Telco Interface Equipment) shall
provide a secondary voltage of single phase 120/240 or three phase
208Y/12OV and must have a system ground conductor.
Receptacles: All 120V service drops in the equipment room must have
IG type receptacles. Each circuit must have individual hot, neutral, and
ground conductors.
NEMA numbers for receptacles are:
2081240
@
30 A IG-6-30
120 @ 15 A IG-5-15
Panel circuit breakers are:
. .
208Vl24OV 30A
A dedicated service panel should be located in the equipment room.
If the service panel has sufficient terminating points on the isolated
ground bus, the logic return equalizer may not be required.
Installation planning 553-3001-120
Y