INCORPORATED
®
Installation
ITC-Series
Inverter
Page 20
10/07/05
I NCO RPO RATED
I nvert er
On/ Of f
Charger
On/ Of f
Ov e rl o ad
L o w
Ba tte ry
F a u l t
Ov e rl o ad
Bu l k
F a u l t
F 14 Figure 4.1-1 Shelf Mount Configuration
NOTE
The wiring of your inverter installation should conform to the National Electric Code (NEC) and any other state
or local codes in effect at the time of installation. Article 551 of the NEC requires any DC cable from a battery,
which measures longer than 18 inches along its length, be protected by a fuse. Other codes may require each
ungrounded output conductor from a storage battery, other than to the engine cranking motor, to have a
manually reset trip-free circuit breaker or fuse within 18 inches of the battery as measured along the conductor.
DC Wiring
Preliminary Considerations
1.
BE AWARE
that, as a large number of capacitors become charged upon completion of the DC circuit,
THERE WILL BE A LARGE SPARK
when the last battery connection is made. The spark is normal and will
occur every time the batteries are connected.
2. The DC cables should be as short as possible. It is electrically more efficient to run the lower current AC
wiring longer distances than the DC cables. (See DC Cable Sizing Chart for proper size.)
3. Route the DC positive and negative cables as close together as possible, and use cable ties to keep them
together. This reduces some electromagnetic radiation that could interfere with some sensitive electronics.
3. On vehicle installations do not use the vehicle chassis as the DC negative conductor. Use a cable the same
size as the DC positive to go directly from the inverter to the battery negative.
4. Route the AC and DC power wiring separately, and with as much physical separation as possible, from low
voltage wiring such as audio and video signal wires.
5. DC power input cables that pass through steel or other ferrous metal walls need to pass through the same
hole. If two holes are required, cut a slot connecting the two holes to prevent a transformer effect.
6. Do not allow wire fragments or metal shavings to fall into the DC wiring compartment or to enter the inverter
in any way. Severe inverter damage will result which is not covered by the warranty.
7. Do not connect the inverter to the battery at this time. Final battery connections will be made after all
installation issues have been inspected.
8. WARNING:
A poorly made high current connection may result in the risk of fire and personal injury.
9. WARNING:
Be sure of the polarity of the DC input wiring. Reverse polarity may severely damage your
inverter and is not covered under warranty. Risk of fire or explosion of batteries may occur due to very high
currents.
10. A DC fuse is required to properly protect the inverter.
11. The table below shows the recommended minimum cable size which should be used. Wire sizing charts
published in the NEC may allow a greater amp capacity than we recommend. We have sized the cable for a
minimum voltage drop on the cable to maintain better performance of your inverter installation. The
inverter‟s DC cable terminal lugs can accommodate cable sizes up to 250 MCM.
T 2 Table 4-1 DC Cable and Fuse Sizing Chart
