MP SERIES™ Battery Backup System for Traffic Signals: MP2000E System
Volume One: Operating Manual
Page 4-6
Figure 4-4: Wiring Step 3: Connect Output or Signal Cabinet and Battery
DANGER: Make sure the upstream circuit breaker feeding the utility power is
OFF before beginning Step 4. Leave the NEUTRAL and GROUND wires
connected from utility to signal cabinet. Extend the NEUTRAL and GROUND
wires from their corresponding bus bars in the traffic cabinet to the terminal
block on the PTS.