Oven replacement breaker question


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Old 06-25-15, 08:35 AM
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Oven replacement breaker question

I have a question please I need some help with:

I have had an electric oven in my house on a 40A breaker - I looked up and I think the oven needed a 20A breaker, maybe a 30A - so the breaker has always been "larger" than needed.

I had a new oven installed - that absolutely needs a 20A - not a 30A, and not a 40A - I even called to confirm.

The installer swapped the oven and was done, no breaker change - it works great. It was a 4 wire wall and a 4 wire oven - black, white, red and neutral I think

But an electrician later told me that
the breaker should be lowered to a 20A
and
then he said something like: And a "leg should be tied off"

Can someone explain to me what the "leg should be tied off" means, if it's true, and if I should have the breaker lowered to 20A?

I can (safely with the entire master panel off) swap out the breaker, but I don't even know what that "tie off the leg" means.
I want to do this if it's a safety issue, or a code issue (Texas).

Thank you!

Carl
 
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Old 06-25-15, 08:44 AM
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Welcome.
Very good description of the issue. Please post model number of oven. Tying off a leg would be unusual for a 240V oven.
 
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Old 06-25-15, 10:11 AM
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Thanks for responding - here is the info:

Frigidaire - FGEW3065PF
Frigidaire Gallery 30'' Single Electric Wall Oven Stainless Steel - FGEW3065PF
http://manuals.frigidaire.com/prodin.../807153701.pdf

Here is the electrical info:
Voltage Rating: 240V / 208V 60Hz
Connected Load (kW Rating) @ 240V: 3.7 / 2.8
Amps @ 240 Volts: 15.4 / 13.5
Minimum Circuit Required (Amps): 20A

So "tying off" means to tie off one of the 220V legs? to bring it down to 110V?

Carl
 
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Old 06-25-15, 10:45 AM
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So "tying off" means to tie off one of the 220V legs?
There is no 220 leg. Your house is supplied with 240. Your oven is 240. Some ovens are 120/240. Yours isn't so the neutral isn't used if the feed is 4-wire. That is probably what the electrician meant.

On a 3 wire feed where permitted the white is used as a ground according to the manual. Do you have a 3-wire feed with no ground?

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Old 06-25-15, 12:04 PM
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I can (safely with the entire master panel off) swap out the breaker, but I don't even know what that "tie off the leg" means.
I want to do this if it's a safety issue, or a code issue (Texas).
After looking at the oven specs and seeing Ray's response, I recommend this:

- Change out double pole 40A breaker to a double pole 20A breaker

- If you paid for installation, the installer knows what wires to hook up in the junction box behind oven. I would not be concerned with verifying the connections behind oven.

- Just a side note: The installers know the various wiring configurations and will inform you if you do not have the proper cable for your new appliance. If you do not, they will recommend you hire an electrician to run new cable. However, installers will not change out breakers if the new appliance is over-protected. Their only job is to install the appliance. I think they should at least inform you to swap out the breakers.
 
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Old 06-25-15, 12:33 PM
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To add nothing needs to be disconnected in the breaker box. The installers should have capped the neutral in the oven junction box if it is a 4-wire feed. All you need to do in the breaker box is swap out the breaker.
 
 

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