What size ground wire?

Hello all,

I need to convert a 50A 3-prong range receptacle to a 4-prong range receptacle, so I need to run a 50' ground wire from the receptacle to the ground buss. Can anyone tell me what size ground wire to use? Is it the same size as the conductors?

Thanks.

Reply to
Caesar Romano
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Yes

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Reply to
dpb

10ga copper (250.122)
Reply to
gfretwell

I know if you buy a new electric dryer, you can either put a 3 prong cord plug on and tie the neutral and groung together, or you can convert the outlet to a 4 prong outlet and tie together the neutral and ground. Does the same rules apply to a range?

Reply to
Mikepier

You can use an existing 3 wire circuit and bond the ground and neutral on the appliance or install a 4 wire circuit and separate the ground and neutral on the appliance

Reply to
RBM

If the conductors in the cable are # 10, 8, or 6, you would use a #10 grounding conductor

Reply to
RBM

I believe that you will need to run a new 4 conductor cable as I think it is against code to run a separate wire outside the outside layer of a bundle of wires. In other words, one cannot create a 12/3 with ground out of 12/2 and a separate wire. You need to run a full 12/3 cable. I had to change out such a wire when we built our house.

Why do you need to convert it? Why can't you use a 3-prong cable from the range?

Mike D.

Reply to
Michael Dobony

On Wed, 25 Nov 2009 22:30:49 -0600, Michael Dobony wrote Re Re: What size ground wire?:

It's a new $800 range with a 4-prong cord so I would rather update the receptacle if feasible.

Reply to
Caesar Romano

In a replacement scenario you can usually run a separate wire for the ground as long is it is protected from damage or fished through a wall.

250.120(C) Equipment Grounding Conductors Smaller Than 6 AWG. Equipment grounding conductors smaller than 6 AWG shall be protected from physical damage by a raceway or cable armor except where run in hollow spaces of walls or partitions, where not subject to physical damage, or where protected from physical damage.
Reply to
gfretwell

Thanks for the info.

Reply to
Michael Dobony

On Wed, 25 Nov 2009 07:40:52 -0600, Caesar Romano wrote Re What size ground wire?:

Thanks to all who commented and contributed to this.

Regards, C.R.

Reply to
Caesar Romano

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