What is the appropriate way to bond a metal junction box containing a receptacle wired with 6 AWG wire? It seems that most metal junction boxes have a 10-32 tapped hole to accept a ground screw but almost all of the pre-built pigtails that I've seen that attach to this screw are 12 AWG. Using some sort of ginormous wire nut to connect 2-6 and 1-12 AWG wires doesn't seem like the right move.
Is there some sort of ground lug that attaches to the 10-32 hold and then accepts the two 6 gauge wires? How is this normally done?
Best Answer
First off, why is the ground #6? Seems big unless the circuit is over 60A.
Personally, as Tester commented, I'd use a double lug screwed to the box via a machine thread screw, that is if you can find one small enough. The one Tester linked is quite large for the application. Smaller ones might be hard to find though. This one is the smallest I could find: http://www.cesco.com/b2c/product/Burndy-K2A25U-Two-Conductor-Terminal-Lug/159535
Another alternative is to splice the two grounds to a third tail and connect that to a single small lug screwed to the box. http://www.cesco.com/b2c/product/Blackburn-Elastimold-L70-Type-L-Slot-Screw/3978