Cisco Systems CRS-1 manual DC Input Power Cable Lug

Chapter 2 Power and Cooling

DC Power Requirements

Each DC input power cable is terminated at the PDU by a cable lug. The cable lugs must be dual-hole, and have a 45-degree angle tongue. They must be able to fit over 1/4-inch terminal studs at 0.625-inch (15.88-mm) centers. For example, you could terminate a 2-AWG power cable with a cable lug, such as Panduit part number LCC2-14AWH-Q (Cisco part number 32-0677-01) or equivalent (see Figure 2-1).

Note To avoid hazardous conditions, all components in the area where DC input power is accessible must be properly insulated. Therefore, before installing the DC cable lugs, be sure to insulate the lugs according to the manufacturer’s instructions.

Figure 2-1 DC Input Power Cable Lug

All measurements in inches

2.38

	Ø 0.27
0.60
	2 holes

0.25 0.63 0.38

1.16

1.44

45˚

2.38

.10

129535

Note DC input power cables must be connected to the PDU terminal studs in the proper positive

(+)and negative (–) polarity. In some cases, the DC cable leads are labeled, which is a relatively safe indication of the polarity. However, you must verify the polarity by measuring the voltage between the DC cable leads. When making the measurement, the positive (+) lead and the negative (–) lead must always match the (+) and (–) labels on the PDU.

•An earth ground cable is required for each DC PDU. We recommend that you use at least 6-AWG multistrand copper wire. This wire is not available from Cisco Systems; it is available from any commercial cable vendor.

The ground wire cable lug should be dual-hole (as shown in Figure 2-2) and able to fit over M6 terminal studs at 0.625-inch (15.88-mm) centers (for example, Panduit part number LCD6-14A-L or equivalent).

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