16
Connect the AC Wiring
1.
Follow standard practice and local code to de-energize the applicable circuit and lock out/tag
out the disconnect before proceeding. Use a multimeter to test that power is off.
2.
If not already done, pull service wiring through the conduit in the installation pad as described
in the
Express 250 Site Design Guide
.
3.
Remove the AC wiring cover on the left side of the Express
250 by pressing on its sides and sliding it downward. Pivot
the bottom away from the Express 250 frame.
4.
Measure the length needed to extend the wiring from the
conduit opening to the Express 250’s terminal block
(approximately 61 cm/2 ft). Trim the excess wire.
DANGER:
RISK OF SHOCK
.
Before performing this procedure, disconnect the power to the
Express 250 at the service panel. Keep power off for this circuit until all cover panels are
correctly reinstalled and the work scope is completed. FAILURE TO FOLLOW THESE
INSTRUCTIONS CAN RESULT IN SERIOUS INJURY OR LOSS OF LIFE.
CAUTION:
Ensure a grounding conductor that complies with local codes is properly
grounded to earth at service equipment or, when supplied by a separate system, at the
supply transformer.
Important:
The AC terminal block on the Express 250 accepts 35 mm
2
(2 AWG) wires only.
If using a larger gauge wire to accommodate a long run, reduce the wire size at the local
external disconnect.
CAUTION:
Installing the rodent guard brackets as described below protects the system
against pest ingress from under the station or along the wiring. Pest ingress in AC and DC
terminal areas can damage the system and/or result in system downtime. Rodent guard
bracket installation is required.
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