Cummins/Onan — Load Connections
Installation · generator reconnection terminal block
From a Cummins/Onan service manual covering: C400 D5e, C400D5, C450 D5e, C450 D6e, C450D5, C450D6, C500 D5e, C500 D6e, C550, C550 D5, QSX15. Check it applies to your exact model before use.
Applies to: Cummins/Onan C400 D5e, Cummins/Onan C450 D5e, Cummins/Onan C450 D6e, Cummins/Onan C450D5, Cummins/Onan C450D6, Cummins/Onan C500 D5e, Cummins/Onan C500 D6e, Cummins/Onan C550 D5, Cummins/Onan QSx15, Cummins/Onan QSX15-G8/G9 engine
Procedure
- Bolt stranded load wires to the appropriate terminals on the generator reconnection terminal block or circuit breaker lugs.
- Connect terminals marked U, V, W and N to indicate line and neutral connections (U, V, W = L1, L2, L3; N = L0).
- Balance loads so that current flow from each line terminal (L1, L2 and L3) is about the same.
- Ensure each line current is within 10 percent of median value and no line current exceeds the nameplate rating.
Specs & values
- Each line current within 10 percent of median value
- Flexible conduit and stranded conductors must be used
Full service-parts list: Cummins/Onan C400 D5e →, Cummins/Onan C450 D5e →, Cummins/Onan C450 D6e →, Cummins/Onan C450D5 →, Cummins/Onan C450D6 →, Cummins/Onan C500 D5e →, Cummins/Onan C500 D6e →, Cummins/Onan C550 D5 →, Cummins/Onan QSx15 →
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.