Trace Engineering DR Series Owner’s Manual - Version 3.2 - 9/7/98 - Page 24
AC Wiring
Overview
The National Electrical Code (NEC) defines the standards for AC and DC installation wiring in
residential, commercial, and RV applications, but there are still many installation variables. Most are
determined by the level of automatic switching desired and the amount of external AC power to be
switched.
DR15XX AC Hardwiring DR24XX and DR36XX AC Hardwiring
Figure 5, DR Series AC Hardwiring
AC Connections
Installation should be done by a qualified electrician. Consult local code for the proper wire
sizes, connectors and conduit requirements.
On the right end of the chassis is the AC hardwire cover or conduit box (dependent on the inverter’s
power level). A five station terminal block is provided to make the AC connections. The terminal block
is used to hardwire the AC input, AC output, and AC safety ground. Table 5 gives suggestions for wire
sizing. Code requires that an external disconnect switch be used in the AC input wiring circuit. The AC
breakers in a sub panel will meet this requirement.
Step 1 - Disconnect the inverter from the battery either by turning off the battery disconnect or
removing the battery cables from the battery. Turning of the inverter power button does not constitute
disconnecting from the battery.
Step 2 - Feed the wires through appropriate conduit and through the bottom part of the AC cover. In
certain installations, conduit fittings may be replaced with strain reliefs, consult local and national
codes. (Note: The U.S. requires use of conduit in this installation, consult the NEC. See Figure 5.
Step 3 - Following the wiring guide located in the AC wiring compartment Figure 5, connect the
safety(green), hot(black), and neutral (white) wires from the AC input (utility, generator, etc) to the
terminal block and torque 10-15 inch-pounds. Caution!! Be sure the AC source is disconnected
before attempting to hardwire it to the inverter.
Step 4 - Connect the AC output wiring to the inverter terminal marked AC hot out following the
color coding marked on the wiring guide inside the compartment. Connect the AC neutral out to
the inverter’s AC neutral out terminal and to the AC sub-panel serving the AC loads. Torque the
wires into the terminal block, 10-15 inch-pounds.
Step 5 - Replace the bottom half of the cover and then the top half. Use the two 6-32 screws and lock
washers to secure the covers.
Conduit
Conduit
Conduit
Box
Five Terminal
AC Hardwire
Block
Top Cover
Top Cover
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