ECN Forum Forums General Topics of the Trade General Discussion Area electric range question

thank you all for your responses. I have a further question, and it may have nothing to do with the problem, but both of the large burners on the stovetop had the same voltage problem. The two smaller ones did not. My first thought was a burner leaking current, but the burners are new.
Iwire, I am a little confused by your post.

IF the problem was in the branch circuits neutral / ground you would not see 40 volts between the frame and the burner.
IF the problem was in the branch circuits neutral / ground you might find 40 volts between the frame and a 'good' ground or 40 volts between the burner and a good ground.

So I get the first part, no ground no potential difference.But in the second part I am just confused as to what you are trying to tell me.
I took voltage readings at the receptacle they where:

L-L 205.8
L-N 118.9
L-N 119.3

I took the measurements with a Fluke 337.

Trekkie, are you on 2 phases of a 120/208 wye system? Is the range plug 3 conductor or 4? If 3, is there a missing Neutral Ground jumper?

Larry C

Larry
Neutral ground jumper?
Say what?

Eddy,

If the range is supplied from a 3 wire branch circuit there must be a jumper installed in the range that connects the ranges frame to the neutral conductor.

For many years electric ranges and dryers where allowed to be grounded via the neutral.

That allowance has been removed except for existing range and dryer circuits.

[This message has been edited by iwire (edited 11-03-2006).]

LarryC, Yes I am on a 208Y/120 3 Phase 4 wire system. The receptacle is a 50 amp 3 wire. the bonding jumper is in place.

To verify:
L1 & L2 two phases of 120/208 wye system.

Building side receptacle: L1, L2, Neutral. Metal receptacle box connected to Earth.

Stove side: L1, L2, N+Frame tied together.

2 Large burners approx 40 VAC between burner elements and frame of stove.

2 Small burners approx 0 VAC between burner elements and frame of stove.

Voltage measurements taken with digital voltmeter.

Burner element to stove frame voltage present only when element is turned on?

Stove frame to verified ground less than 5 VAC? With large burner turned off and on?

Larry C

LarryC, yes all is true except:
1.Metal box connected to earth. It is a surface mounted recep.
2.verified less than 5 VAC to ground. I havent been back to test any of the things mentioned on here yet. I should be going back thursday.

Thanks, Gary