Dell PowerConnect B-RX Schnellstart Anleitung PDF herunterladen (Seite 11)

PowerConnect B-RX Series Getting Started Guide 11

53-1001682-03

CAUTION

Ensure that the device does not overload the power circuits, wiring, and over-current protection. To

determine the possibility of overloading the supply circuits, add the ampere (amp) ratings of all devices

installed on the same circuit as the device. Compare this total with the rating limit for the circuit. The

maximum ampere ratings are usually printed on the devices near the input power connectors.

CAUTION

Devices with DC power sources are intended for installation in restricted access areas only. A restricted

access area is where access can be gained only by service personnel through the use of a special tool,

lock and key, or other means of security, and is controlled by the authority responsible for the location.

CAUTION

For a DC system, the gauge of wire will be determined by the power source as well as the power supply

draw (refer to Table 1). Use a grounding wire of at least 6 American Wire Gauge (AWG). The AWG wire

should be attached to an agency-approved crimp connector (provided on the PowerConnect B-RX Series

chassis), crimped with the proper tool. The single crimp connector should allow for securing to both

ground screws on the enclosure. Use a grounding wire of at least 6 AWG. For the grounding lug, use

UL-listed Panduit crimp connector, P/N LCD6-10A, and two 10-32, PPH screws to secure the crimp

connector to chassis. The grounding position is located on the side of chassis adjacent ground symbol.

CAUTION

For the DC input circuit to the system, make sure there is a UL-Listed 30 amp circuit breaker, minimum

-48Vdc, double pole, on the input to the terminal block. The input wiring for connection to the product

should be Listed copper wire, 8 AWG, marked VW-1, and rated minimum 9o C.

TABLE 1 The American Wire Gauge (AWG) guidelines

AWG Ohms per 100 feet Maximum Amps for chassis wiring Maximum Amps for power

transmission

5 0.3133 118 47

6 0.3951 101 37

7 0.4982 89 30

8 0.6282 73 24

9 0.7921 64 19

10 0.9989 55 15

11 1.26 47 12

12 1.588 41 9.3

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 31 32

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Dell PowerConnect B-RX Schnellstart Anleitung Seite 11