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