APC 150kVA PDU W/ 480 PRI 208/120 SEC K1 XMER Specifications download pdf (Page 11)

Safety: Warnings

150 kW InfraStruXure Power Distribution Unit 3

Total power off procedure

1. Open (turn OFF) the main input breaker on the PDU.

2. Open (turn OFF) the main circuit breaker for the power source feeding the PDU.

Emergency Power Off (EPO)

Hazardous voltage from the branch circuit must be isolated from the 24 VAC, 24 VDC, and contact

closure terminals. 24 VAC and 24 VDC are considered Class 2 circuits as defined in Article 725 of

the National Electrical Code (NFPA 70) and Section 16 of the Canadian Electrical Code (C22.1).

A Class 2 circuit is a source having limited voltage and energy capacity as follows:

a. If an Inherently Limited Power Source, voltage and energy are limited to less than 30 VAC,

less than 30 VDC, and 8 A.

b. If not an Inherently Limited Power Source, voltage and energy are limited to less than

30 VAC, less than 60 VDC, 250 VA, and current is limited to 1000/Vmax. The fuse is

limited to 5 A if less than 20 VAC or 20 VDC, or 100/Vmaximum if less than 30 VAC or

60 VDC.

If choosing a 24 VAC, 24 VDC, or contact closure connection to the EPO, use one of the following

UL-listed wire types:

• CL2 Class 2 cable for general purpose use

• CL2P Plenum cable for use in ducts, plenums, and other space used for environmental air

• CL2R Riser cable for use in a vertical run shaft from floor to floor

• CL2X Limited Use cable for use in dwellings and for use in a raceway

• For installations in Canada, the cable should be CSA-certified, type ELC (extra-low-voltage

control cable).

If not using CL2 cable, route the EPO wiring in conduit that does not contain any branch circuit

wiring.

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APC 150kVA PDU W/ 480 PRI 208/120 SEC K1 XMER Specifications Page 11