User Manual

December 16, 2002 Part 003609A revision 01 31
Chapter 2: Site Preparation
Rack Grounds
Table 2.13 shows the grounding requirements for each rack.
Compression Lug Color Codes
Table 2.14 shows the compression lug color codes for common wire gauges.
Ground Type Requirement
Frame ground Each NPM rack requires one connection to its frame assembly for use
as a frame ground. The frame ground cable uses #6 AWG wire.
Main ground Each NPM rack requires one connection to the main building ground,
such as the master ground bar (MGB). The ground cable uses #6
AWG wire.
Isolation pad Each NPM rack must be installed on an isolation pad to ensure proper
grounding. The isolation pads are included in the installation kit.
Table 2.13 Grounding Requirements
Wire Gauge (AWG) Color Code
#6 (used for NPM ground cables) Blue
#4 Gray
#2 (used for NPM main and return power cables) Brown
#1 Green
1/0 Pink
2/0 Blank
Table 2.14 Compression Lug Color Codes