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ADCP-80-570 • Issue 2 • March 2006
Page 6
© 2006, ADC Telecommunications, Inc.
The individual terminals are on 0.375 inch (9.525 mm) centers with a distance between barriers
of 0.32 inch (81.3 mm). The terminals can accept a variety of wire sizes up to #12 AWG with
crimp-on spade lug connectors or wires in sizes from #12 AWG to #22 AWG with the insulation
stripped back. The connectors or wires are inserted under the screws in the terminal strip, and
the screws are tightened down.
In selecting the copper wire size to be used for power output, consider the allowable ampacity as
defined by local practice and the National Electrical Code (refer to Appendix A).
1.9 Chassis Ground Connections
Two #10 studs (with nuts) are provided for grounding the circuit breaker panel chassis. The
studs are mounted on 0.625 inch (15.875 mm) centers, and can accommodate a 2-hole
compression lug. Two crimp ring lug terminals for use with two #10 AWG wires are provided
with the circuit breaker panel.
1.10 Circuit Breakers
The circuit breakers are magnetic actuation, manual reset, single pole, replaceable, 60 Vdc rated
circuit breakers, with finger guard and amperage markings. Each power bus has two 10 Amp
breakers and five 5 Amp breakers. The maximum capacity per bus is 45 Amps.
The circuit breakers are of the type called “short delay.” The trip times of short delay circuit
breakers are a function of the percent of rated current, as indicated in Table 1. The circuit
breaker will trip (open) and the switch will move to the off position (bottom pushed in) when
the circuit current exceeds the capacity of the circuit breaker. To reset a circuit breaker, push the
switch to the on position (top pushed in).
Circuit breakers are field-replaceable. Please contact ADC Technical Support if replacement is
required (refer to Section 8, Customer Information and Assistance, on page 29).
1.11 Power-on Indicators
A green LED Power On indicator for each power bus is mounted on the front panel of the circuit
breaker panel. If the LED indicator is on, power is being applied to the bus input connectors. If
the green LED indicator is off, power is not being applied to the bus input connectors.
Table 1. Short Delay Trip Times in Seconds
PERCENT OF RATED CURRENT
100% 135% 150% 200% 400% 600% 800% 1000% 1200%
NO
TRIP
.300-
7.00
.200-
5.00
.100-
2.00
.030-
.500
.008-
.300
.006-
.150
.005-
.100
.005-
.100