Cummins/Onan — Generator Wiring Methods
Installation · AC electrical connections
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan HDKA, Cummins/Onan HDKAJ, Cummins/Onan HDKAK
Before you start
- EXHAUST GAS IS DEADLY! Seal all wiring openings into the vehicle interior to keep out exhaust gas.
- Faulty grounding can lead to fire and electrocution, resulting in severe personal injury or death.
Procedure
- Have a qualified electrician supervise and inspect the installation of all AC wiring.
- Secure only one lead at each AC output terminal. Terminals are suitable for wire sizes up to No. 6 AWG.
- Install vibration-proof switches and controls that won't open and close circuits when the vehicle is in motion.
- Provide ground fault circuit interrupters (GFCIs) for all convenience power receptacles.
- Route AC wiring, remote control wiring and fuel lines separately.
- Seal all conduit openings into the vehicle interior with silicone rubber or equivalent inside and outside.
- Bond the genset and all connected AC and DC equipment and controls to a common grounding point in accordance with applicable codes.
Specs & values
- AC output terminals suitable for wire sizes up to No. 6 AWG
Full service-parts list: Cummins/Onan HDKA →, Cummins/Onan HDKAJ →, Cummins/Onan HDKAK →
Source: Cummins/Onan service 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.