APC AP9621 User Manual download pdf (Page 6)

CHAPTER 1: SAFETY AND GENERAL INFORMATION

De-energizing Safety

To de-energize this equipment toggle the rear input circuit breaker to the OFF position, and then

disconnect the equipment from the AC power outlet.

Electrical Safety

•

The protective earth conductor carries the leakage current from the load devices (computer

equipment). Therefore, the size of the conductor must be at least as large as the wire required

by IEC 950. An insulated grounding conductor that is identical in size, insulation material, and

thickness to the grounded and ungrounded branch-circuit supply conductors, except that it is

green with or without a yellow stripe is to be installed as part of the branch.

• The grounding conductor described above is to be grounded to earth at the service

equipment, or if supplied by a separately derived system, at the supply transformer or motor-

generator set.

• The attachment-plug receptacles near the unit or subsystem are all to be of a grounding type,

and the grounding conductors serving these receptacles are to be connected to earth ground

at the service equipment.

• To reduce the risk of fire, connect only to a circuit provided with 30-amp maximum branch

circuit overcurrent protection in accordance with the National Electrical Code, ANSI/NFPA.

Regulatory Agency Approvals

Regulatory Agency Symbols

LISTED 42C2

E95463

LR63938

(AP9621,

SYTF2, SYTF3

ONLY)

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APC AP9621 User Manual Page 6