Cummins/Onan — Wiring Installation
Installation · EC-30 wiring harness
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan HDKA, Cummins/Onan HDKB, Cummins/Onan HDKC
Before you start
- CAUTION! Incorrect connections can damage genset controls, remote devices, and interconnect wiring.
Procedure
- Use wire tags or labels to label each end of every wire; use Figures 5 and 6 for correct labels and connections.
- At the controller end, insert the terminated and labeled wires into the correct positions in the connector body.
- At the genset end, insert the terminated and labeled wires into the correct positions in the connector body.
- Use tie wraps at not less than 20-inch intervals to keep the wire bundle neat.
- Use protective sheathing where necessary to protect wires from sharp edges.
Tools required
- Pro-Crimper II W/Die 16-20 (Tyco/AMP 189727-1) Amazon
- Contact Extraction Tool (Tyco/AMP 90760-1) Amazon
- Wire tags or labels Amazon
- Tie wraps Amazon
- Protective sheathing Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Single conductors of 16-20 Amazon eBay FridayParts $14.38 AWG wire
- Minimum separation of 5 inches (127 mm) from AC power sources
- Tie wraps at intervals not less than 20 inches
- UTP cable bends no less than eight times the cable diameter
Full service-parts list: Cummins/Onan HDKA →, Cummins/Onan HDKB →, Cummins/Onan HDKC →
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.