Generac — External Electrical Connections
Installation · connection box
From a Generac service manual — check it applies to your exact model before use.
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Procedure
- Drill a 1 3/4 inch hole and feed the conduit through the hole.
- Remove the knockout in the back of the connection box, feed the wires through, and secure the conduit with the lock nut.
- Seal the hole with silicone caulk inside and outside the house.
- Mount the connection box so it completely covers the hole in the wall. Caulk around the sides and top.
- Connect wires to the lugs (black to black, red to red, white to white). Attach green ground wire to ground screw.
- Replace the protective cover plate and retaining screw, and lock the connection box.
- For 10-20 kW models, insert the metal hasp in the slot on the left side of the external circuit breaker box with the clip facing forward.
Specs & values
- Drill a 1 3/4 inch hole
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.