Nortel Networks manual Option 11C Mini Planning and Installation Guide

Chapter 3 — System and site requirements Page 61 of 332

Figure 7

Typical pluggable cord Isolation Transformer wiring plan

Note 1			Isolation	Note 7	Note 4
Shared	Note 5	Transformer
Panel
					120V IG
					Receptacle
			••
		•			240V IG
Neutral Bus	Note 9	•		Note 8
					Receptacle
		•	•
Gnd Bus
Note 3				Note 2
					Option 11
					Cabinet
					•
				Note 6	Gnd Lug

Notes:

1Power source is site dependent. It may be from a shared panel or transformer. Wiring may vary accordingly. Wiring to panel must be housed in conduit.

2Make SPG at the transformer secondary. If the transformer secondary has no isolated secondary ground lug, make SPG by connecting all system ground lines to the chassis lug on the transformer case. An insulated ground connection must be made between the SPG and a known building ground reference, as per Note 3.

3Terminate the Option 11 SPG insulated ground conductor as near as possible to the main building ground reference. Isolate the ground bus from panel housing if permitted by local codes. Conductor should be minimum AWG #6 (metric #40) at all points.

4Wiring to receptacles must be in conduit unless they are mounted on the transformer case.

5Connection can be made by metallic conduit. Additional copper conductor recommended.

6Minimum AWG #6 (metric #40) insulated copper conductor connected to FGND lug on the Option 11 cabinet. Route separately from AC power cable.

7Separate breaker required for each Option 11 Main cabinet. Breakers must be mounted on transformer if the receptacles are. If they are in a panel served by the transformer secondary, all connections between the receptacles and transformer must be in conduit. The Main Chassis and the Chassis Expander can coexist on the same breaker.

8Connect secondary neutral (X0) to system SPG.

9Conduit required.

553-8322.EPS

Option 11C Mini Planning and Installation Guide