Page 32 of 536
Chapter 3 — System and site requirements
553-3121-210
Standard 3.0
January 1999
Figure 4
Typical pluggable cord Isolation Transformer wiring plan
Note 1
Note 3
Shared
Panel
Gnd Bus
Neutral Bus
Note 5
Note 9
Notes:
1 Power 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.
2 Make SPG at the transformer secondary. If the transformer secondary has no isolated
secondary ground lug, make SPG by tieing 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.
3 Terminate the system 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.
4 Wiring to receptacles must be in conduit unless they are mounted on the transformer case.
5 Connection may be made by metallic conduit. Additional copper conductor recommended.
6 Minimum AWG #6 (metric #40) insulated copper conductor connected to FGND lug on the system
cabinet. Route separately from AC power cable.
7 Separate breaker required for each 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.
8 Connect secondary neutral (X0) to system SPG.
9 Conduit required.
System
Cabinet
Gnd Lug
Note 8
Note 2
•
•
•
Note 7
Note 6
•
• •
•
240V IG
Receptacle
120V IG
Receptacle
Isolation
Transformer
Note 4
Summary of Contents for Meridian Meridian 1
Page 3: ...553 3121 210 Standard 3 0 January 1999 ...
Page 17: ...xiv Contents 553 3121 210 Standard 3 0 January 1999 ...
Page 97: ...Page 78 of 536 Chapter 8 Installing a new system 553 3121 210 Standard 3 0 January 1999 ...
Page 107: ...Page 88 of 536 Chapter 10 Installing the system ground 553 3121 210 Standard 3 0 January 1999 ...
Page 113: ...Page 94 of 536 Chapter 11 Installing the power supply 553 3121 210 Standard 3 0 January 1999 ...
Page 125: ...Page 106 of 536 Chapter 12 Adding an expansion cabinet 553 3121 210 Standard 3 0 January 1999 ...
Page 209: ...Page 190 of 536 Chapter 18 Connecting the trunks 553 3121 210 Standard 3 0 January 1999 ...
Page 323: ...Page 304 of 536 Chapter 21 Installing Hospitality 553 3121 210 Standard 3 0 January 1999 ...
Page 419: ...Page 400 of 536 Chapter 23 Pre programmed data 553 3121 210 Standard 3 0 January 1999 ...
Page 555: ...Page 536 of 536 Chapter 25 Fault locating and clearing 553 3121 210 Standard 3 0 January 1999 ...