Dell PowerConnect B-RX Getting Started Guide - Page 11

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. TABLE 1 AWG 5 6 7 8 9 10 11 12 The American Wire Gauge (AWG) guidelines Ohms per 100 feet Maximum Amps for chassis wiring 0.3133 118 0.3951 101 0.4982 89 0.6282 73 0.7921 64 0.9989 55 1.26 47 1.588 41 Maximum Amps for power transmission 47 37 30 24 19 15 12 9.3 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. PowerConnect B-RX Series Getting Started Guide 11 53-1001682-03