Nortel Networks 1000M warranty 82 of 456 Installing AC power

Page 82 of 456 Installing AC power

Installing safety ground/protective earth and logic return wiring

Follow Procedure 4 to install safety ground/protective earth and logic return wiring.

Procedure 4

Installing safety ground/protective earth and logic return wiring

CAUTION

System Failure

Failure to follow grounding procedures can result in unsafe or faulty equipment. See Communication Server 1000M and Meridian 1: Large System Planning and Engineering (NN43021-220) for a complete description of approved ground sources and methods.

1Make sure the power cord is disconnected from the power source.

Note: As a safety precaution, disable the circuit of each column at the service panel.

2Remove the air intake grill.

3Using a volt/ohm meter, measure the resistance between the ground pin on the power plug and a ground lug on the rear of the pedestal (see Figure 28).

Note: The resistance should be 0 ohms; if it is greater than 0.5 ohms, check the power cord connections.

NN43021-310 Standard 02.01 December 2007