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inverter. Also do not work on AC wiring if it is connected to another AC power source such as a generator or the
utility line.
CAUTION! Electrical installations must meet local and national wiring codes, and should be done by a quali-
fied electrician.
Do not attempt your own AC wiring unless you have the knowledge and experience to do a safe job. Your RV or
boat dealer, or a licensed electrician can do the job for you if you do not wish to do your own wiring.
In many cases you can plug your AC loads directly into the AC receptacle on the front panel of the PROwatt
1500. In other installations you may wish to connect the output of the PROwatt 1500 to existing AC wiring. The
PROwatt 1500 is equipped with internal terminals to allow permanent connection to existing AC wiring. To
make a permanent connection, follow these steps:
a) Ensure there is no DC voltage supplied to the inverter
b) Remove the bottom plate from the PROwatt 1500 (four screws).
This will expose the AC terminal blocks (see Figure 9).
c) Remove the knockout on the rear panel and feed your three con-
ductor AC cable (14 AWG) through the hole. Use a standard
strain relief connector (cable clamp) for electrical junction boxes
(available at hardware stores and building supply stores) to hold
the cable in the hole.
d) Connect the ground lead of your AC cable to the internal ground lug on the rear panel of the PROwatt 1500.
Strip the hot and neutral leads of your AC cable 1/4 inch (6mm) and connect to the AC output terminal blocks
on the PROwatt 1500 circuit board (labeled " AC NEUT" and "AC HOT", in Figure 9A). Check carefully that
you have maintained correct polarity (see below) and that there
are no loose strands of wire. Make certain that the ground lead,
which may be a bare wire, is cut as short as possible and is not
touching any component within the PROwatt.
e) Replace the bottom panel.
CAUTION! When connecting the PROwatt 1500 to existing AC
wiring, be sure to observe the following precautions.
1. Maintain correct wiring polarity. A modern 115 volt AC wir-
ing system has three conductors - hot, neutral (or common), and
ground. Wire insulation is color coded black for hot and white for
neutral. The ground conductor may be a bare wire or it may be a
green insulated wire. Screws on terminals are typically color coded brass for hot, silver for neutral, and green for
ground.
The AC output of the PROwatt 1500 has hot, neutral, and ground conductors. Figure 9A shows the internal ter-
minals for the hot, neutral, and ground conductors. When connecting to the AC wiring, connect the hot (black)
wire to the hot terminal and the neutral (white) to the neutral terminal. Connect the ground wire to the internal
ground lug in the PROwatt. Connect the other end of the ground wire to a grounding point on a junction box or
breaker panel.
Improper connections, such as connecting a "hot" conductor to a neutral conductor, will cause the PROwatt 1500
to malfunction and may cause permanent damage to the inverter.
Figure 9. PROwatt 1500 AC
output connections
Figure 9A. AC Output Terminal Block
AC output
terminal block
AC HOT
AC NEUT
GND
