ADCP-80-531 • Issue 4 • July 2004
Page 22
© 2006, ADC Telecommunications, Inc.
Figure 13. Rear View of Circuit Breaker Panel Cabling
(Panel with Wire Wrap Alarm Connection Shown)
4.7
Chassis Ground Connection
Mounting the circuit breaker panel on a metal equipment rack using metal mounting brackets as
described in
, provides a sufficient return path to meet equipment
grounding requirements. However, a separate grounding conductor is often required by local
practice or local inspectors. A separate chassis grounding conductor is always needed when the
circuit breaker panel is mounted to non-grounded or non-conducting material, e.g., a plastic
rack or cabinet. When the panel requires separate chassis grounding, the chassis grounding
conductor is sized to match the upstream protection device feeding the panel. This provides an
adequate return path capable of allowing the circuit breaker to fail in the unlikely event of a
battery wire to chassis fault.
Caution:
Connect only the input voltage wire (labeled
BATTERY,
BATT
,
NEGATIVE
,
NEG
, or
–
and/or the
voltage value
) to the connector on the circuit breaker panel labeled
BATT
(battery). Connect only the input return wire (labeled
RTN
,
RETURN
,
POSITIVE
,
POS
,
+,
or
BATTERY GROUND
) to the connector on the circuit breaker panel labeled
RTN
(return). If
the wires are reversed, voltage could be present on the circuit breaker panel chassis and current
could flow through the unprotected return wiring in the circuit breaker panel. This condition
causes damage to equipment in the frame in which the circuit breaker panel is installed and to
equipment in adjacent frames!
16763-B
CONNECT TO
EQUIPMENT
RACK
CONNECT TO
BUS B BATTERY*
CONNECT TO
BUS B RETURN**
CONNECT OUTPUT
RETURN TERMINALS
TO OUTPUT
RETURN CIRCUITS
CONNECT OUTPUT
RETURN TERMINALS
TO OUTPUT
RETURN CIRCUITS
CONNECT OUTPUT
POWER TERMINALS
TO OUTPUT
POWER CIRCUITS
CONNECT INPUT
CONNECTOR TO
BUS A BATTERY*
CONNECT INPUT
CONNECTOR TO
BUS A RETURN**
CONNECT REMOTE
ALARM TERMINALS
TO REMOTE ALARMS
CONNECT OUTPUT
POWER TERMINALS
TO OUTPUT
POWER CIRCUITS
*NOTE: CONNECT INPUT VOLTAGE WIRE LABELED "BATTERY," "BATT," "NEGATIVE," "NEG," OR "-"
AND/OR THE VOLTAGE VALUE TO THE "BATT" CONNECTOR ("HOT" WIRE).
**NOTE: CONNECT INPUT RETURN WIRE LABELED "RTN," "RETURN," "BATTERY GROUND,"
"POSITIVE," "POS," OR "BATTERY GROUND" TO THE "RTN" CONNECTOR.
OUTPUT
RETURN
CONNECTORS
OUTPUT
POWER
CONNECTORS
OUTPUT
RETURN
CONNECTORS
OUTPUT
POWER
CONNECTORS
LANCE FOR
SECURING
INPUT CABLES
LANCE FOR
SECURING
INPUT CABLES
