Generac — Reconnection for Dual Voltage Output
Installation · generator
From a Generac service manual covering: NP45G, NP52G, NP55G, NP65G, NP66G, NP72G. Check it applies to your exact model before use.
Applies to: Generac NP66G, Generac V-Twin engine
Before you start
- Electrical hazard: ensure power is disconnected before working on connections.
Procedure
- Gain access to generator panel interior by removing generator cover and front panel.
- Locate stator leads 11 and 33 that connect to circuit breakers CB1 and CB2. Also locate leads T1 (red) and T3 (black). Disconnect all of these leads from the two circuit breakers.
- Set aside the red (T1) and the black (T3) wires for later use.
- Disconnect stator leads 22 and 44 from the grounding terminal (GT).
- Disconnect one of the two white (T2) leads that attach to the grounding terminal (GT).
- Install new breakers or, if existing breakers are both rated 30 amps, modify them by installing a rod or bolt between the two breaker handles. Both breakers must operate simultaneously.
- Connect stator a-c output leads 11 and 44 to the 2-pole circuit breaker as shown. Attach leads T1 (red) and T3 (black) to the circuit breaker. Connect stator a-c output leads 22 and 33 together. From
- Reassemble the panel and generator cover after all connections are completed.
Full service-parts list: Generac NP66G →
Source: Generac 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.