Researching the requirements 27
Notes for Figure 2:
-
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: Each circuit must have individual hot, neutral, and ground
c
conductors.
NEMA
numbers for receptacles are:
208/240
@
30
A
L6-30
120 @
15 A 5-15
Panel circuit breakers are:
208V/24OV 30A
.
A dedicated service panel should be located in the equipment room.
Auxiliary equipment using an RS-232 interface will, if such equipment
is too remote to be powered from the SL-1 service panel, require a
modem or fiber link to provide ground isolation.
Connection to the building ground source should be made at the same
physical location as the transformer grounding conductor. If the LRE is
connected to a building ground point other than the transformer ground
point, a bonding jumper must be installed between the two points.
Two approved fastening devices or cadwelded devices should be used
here.
Installation planning 553-3001-120
.
.
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