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10 Ground Wire In 4 Gang Box Crimp Question

880 Views 22 Replies 13 Participants Last post by  seharper
Good morning all,

I have a 4 gang box plastic and a need to connect 10, 14 awg ground wires. Red wire nuts are max 6, 14 awg wires and if I understand correctly for CA code each device has to have its own ground so I cant daisy chain ground from switch 1 to switch 4 then to main ground branch?

Whats ideal way to connect the grounds together? Can / Should I use a greenie and terminate all 6 romex wires together with 1 longer wire to then wire nut / join 4 pigtails from the switches?

Devices / wires:
1) power in 14/2
2) outside lights 14/2
3) front porch 14/2
4) entry light 14/2
5) 3 way 14/3 out to 2nd switch
6) power out 14/2

Forgive the sloppy art, trying to plan the termination for rough-in inspection before I start.
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Thought it best create a new post but link to old post with some relevant info 4 Gang Box Wiring / Crimping Question
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· Registered
30 Posts
Discussion Starter · #3 ·
I do not know about CA code, but if that's so, a gray or blue/gray wirenut will do. Also, you can bundle several + a jumper under 1 wirenuts and use the jumper and the remaining in another wirenut.
Awesome thanks. how would you do it in your area?

· Registered
30 Posts
Discussion Starter · #14 ·
There is no more risk of a jumper breaking than there is of any of the EGCs breaking. The EGCs often break inside insulation or inside wire nuts. Either is rather hard to spot until after the devices are installed and a circuit tester is applied.

An easy but seldom used way to connect multiple Equipment Grounding Conductors in a large electrical box is to install a small add on EGC busbar in the box. Some of the smaller accessory busbars that are made for installation in panel cabinets and other equipment enclosures are also listed for use in electrical boxes. A metal box must be thick enough to engage 2 full threads of the mounting screw or screws. At 32 threads per inch that only takes a 16th of an inch of wall thickness. Most electrical boxes are thicker walled than that.

With a plastic box such as the Discussion Starter has it only needs to be fastened in place. Since many of of those busbars are listed for 3 EGCs in each terminal the shortest ones commonly sold are more than enough for the use. Using a busbar for the EGCs makes an elegant and professional looking installation.

Tom Horne
I like this idea, seems very clean. Going to see if I can find something that would work.
I have already wired the one box using the 5+pigtail to another 5, but I have another one to do.
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