Cummins/Onan — Line, load, and battery connection
Installation · AC line, load, and battery terminals
From a Cummins/Onan owner's manual — check it applies to your exact model before use.
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Before you start
- Proper polarity of battery and ac line-load connections must be observed or transistor inverter will be instantly destroyed.
- Reverse polarity of battery will burn out transistors.
Procedure
- Connect ac lines and load to proper terminals on TB1. The 10-32 screw terminals will accept lugs up to 7/16 inch wide. BE CERTAIN they are correctly installed.
- Check normal operation by applying line ac power to regular load.
- Connect batteries MAKING CERTAIN the positive lead (+) is connected to the red (+) terminal and the negative lead (-) is connected to the black (-) terminal. The 1/4-20 terminal studs will accept lugs
Source: Cummins/Onan owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.