Disconnects are an inexpensive way to connect two relatively large gauge conductors for 40-100A applications. However, most 240V disconnects only provide lugs for the two ungrounded conductors and the ground wires -- leaving no place to connect the neutral.

What's the best way to inexpensively bond the two neutrals when using 3-wire + ground cables? Large wire nuts are available, but I would prefer a lug-based connection, which seems more reliable at high currents. Polaris lugs are suitable but relatively costly. Does anyone have a more economical suggestion?

1 Answer 1


For the 240V single-phase 60A circuit to my shop I used a 3-phase disconnect. It had 3 switched terminals, and also a ground lug bonded to the case itself. The inspector was fine with this approach.

Elsewhere for another project I used Polaris lugs which I got off eBay for a reasonable price, and were very easy to work with. Far simpler than using a split bolt and gobs of electrical tape and other supplies. But that said, a split bolt would work perfectly well if installed correctly.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.