Electrical

Terminals, Wire Size, and Installation Torque

Terminals are provided for phase (line), neutral, and equipment ground connections. The SPD terminals accept a range of 12 AWG (3 mm2) to 2 AWG (34 mm2) copper wire for phase, neutral, and ground connectors. Torque connections to the following values.

Table 3: Terminal Torque

Power Connection

Torque

 

 

AØ, BØ, CØ and N

35 lb-in. (4 N•m)

 

Ground

 

 

 

Branch Circuit Overcurrent Protection and Disconnect Means

DANGER

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH

Use conductors rated for the Overcurrent Protection Device (OCPD) per applicable codes.

Use conductors rated for the application per applicable codes.

Failure to follow these instructions will result in death or serious injury.

A branch circuit Overcurrent Protection Device (OCPD) either in the form of a circuit breaker or fuse, must be provided for the SPD. The branch circuit OCPD should either provide or include a disconnecting means.

Since the current drawn by the SPD during standby operation is negligible, the SPD can be connected to a dedicated, separate branch circuit or connected to a suitable existing branch circuit.

When connected to a separate, dedicated branch circuit, the OCPD setting must be selected to protect the conductors feeding the SPD.

When connected to an existing branch circuit, the conductors connected to the SPD must have an ampacity not less than the setting of the existing OCPD. Refer to Terminals, Wire Size, and Installation Torque section above, for the maximum conductor cross-section that can be connected to the SPD.

During overvoltage surge diversion, current will flow through the SPD. The branch circuit OCPD must pass this current without tripping for the SPD to function properly.

For further information concerning coordination of the OCPD with the SPD, refer to the Caution statement “Loss of Branch Circuit Power/Loss of Surge Suppression” on page 4.

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Installation and Operation Manual

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APC PMG3XS-B Terminals, Wire Size, and Installation Torque, Branch Circuit Overcurrent Protection and Disconnect Means

PML3XS-B, PMJ3XS-B, PMH3XS-B, PMF3XS-B, PMP3XS-B specifications

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