I want to connect 8 gauge wires to a 30 amp safety switch (http://smile.amazon.com/Leviton-3032-2W-Toggle-Double-Pole-Grounding/dp/B002MPPTBQ), but the wire is too thick to wrap around the screws on the switch. What's the best way to attach the wires to the switch?

(don't worry, they're on a 30 amp breaker in the panel)

  • Is this a 120v or 240v circuit? If you are using 240, then you will need to get a double pole switch. Mar 28 '16 at 20:06
  • I am, and it is.
    – iLikeDirt
    Mar 28 '16 at 20:33

10 gauge wire should certainly fit on the screws; get a short bit of solid 10ga wire and pigtail that onto the switch. 10 gauge is legal for 30 amps, and a few inches of 10ga isn't going to defeat the purpose of running 8 gauge.

  • But then you'll need to enclose the 8-to-10 connection inside a box to meet code. Mar 28 '16 at 14:22
  • @CarlWitthoft The switch also has to be in a box, so you'd just make up the pigtails in that same box.
    – Tester101
    Mar 28 '16 at 16:54
  • Wire-nuts should suffice. Mar 28 '16 at 17:33
  • This worked just fine.
    – iLikeDirt
    May 2 '16 at 1:31

You'll need to either crimp-on cheap Fork or Ring Terminals or go to a budget blowing Switch Box.

big wires little screws

  • I was not able to locate a spade connector that was rated for 30A/8awg. Are these common? Mar 28 '16 at 20:09
  • I hadn't needed them for years (kitchen range),, but they were readily at my local Electrical Supply store & online places like Grainger have them (that's where I got the pics). There are also much bigger & thicker ones for car batteries & alternator setups or you can even use subpanel lugs from that side of things.
    – Iggy
    Mar 29 '16 at 1:27

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

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