Cummins/Onan 10CW — Voltage Selection (Single Phase Plant)
Installation · Generator terminal box
For the Cummins/Onan 10CW, from the Cummins/Onan owner's manual.
Applies to: Cummins/Onan CW series engine
Before you start
- Consult local electrical code for grounded 240V requirement.
Procedure
- Connect load wires to terminals M1, M3, M2, M4.
- For 120/240V 3-wire leave jumpers across M3 and M2.
- For 120V 2-wire move jumpers to M1-M3 and M2-M4.
- For 240V use M1 and M4 with M3-M2 jumpers.
- For grounded 240V connect M1 to M4 and use M3/M2.
Tools required
- #10 or larger wire Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
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.