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Installation
3–8
Installing Transfer Switches in AC Circuits
If you are using another AC source on the same circuit as the
PROwatt 1000, install a transfer switch to ensure that the sources never
power the circuit at the same time.
The switching mechanism can be as simple as a plug that you insert in the
desired AC power source. See Figure 3-2.
You can also use a manual or automatic transfer switch. See Figure 3-3. A
transfer switch is a double pole, double throw (DPDT) switch that switches
both the line and neutral wires to the AC distribution system from one
power source to the other. They are commonly used to switch between a
generator and utility power (shorepower).
Figure 3-1 Bottom View of Inverter Showing AC Terminal Blocks
Inverter as viewed
from the bottom with the
bottom panel removed.
DC End of Inverter
Cable clamp
14 AWG leading to
distribution panel
AC End of Inverter
Black = line or “hot”
White = neutral or
Green or bare = ground
“common”
14 AWG leading to
distribution panel
AC Terminal blocks
– White connects to AC NEUT
– Green or bare connects to AC GND
(from left to right):
– Black connects to AC HOT
PROWatt100.book Page 8 Friday, January 5, 2001 3:03 PM