Wiring a Stove - Quick Question

Reply

  #1  
Old 01-24-08, 05:32 PM
Member
Thread Starter
Join Date: Feb 2006
Posts: 28
Received 0 Votes on 0 Posts
Wiring a Stove - Quick Question

Hello all,
I'm trying to hard wire in a new range. The wires out of wall are bare / white / black. Voltmeter across Black and White indicate 240.

Stove book only shows 4 wire hook up (black/bare/white / red).

Do I Split the black from wall and wire to red / black terminals on stove?

Thanks
 
Sponsored Links
  #2  
Old 01-24-08, 06:02 PM
Member
Join Date: Nov 2004
Location: USA
Posts: 973
Received 0 Votes on 0 Posts
The instructions should show wiring for a 3-wire installation. If not, you might want to check with the manufacturer to ensure that it's OK for a 3-wire circuit.

You have an older 3-wire stove circuit, where the neutral wire is also used to "ground" the stove. These circuits are no longer allowed as they are less safe than 4-wire stove circuits that have a separate ground. (In the same way, 3-wire dryer circuits were once allowed, but are not now.) You are allowed to continue using the circuit, but if you remodel, or otherwise need to modify the circuit, code would require it be replaced with a 4-wire circuit.

The black and white wires are your two hots, and the bare is your *neutral*. You have no ground wire. Most likely, the correct wiring method is stove black to wall black, stove red to wall white, stove white AND bare to wall bare.

That said, confirm with the manufacturer that this is correct. It's hard to imagine the instructions not mentioning what to do for a 3-wire install. Since we're talking grounding, and grounding is for safety, it's imperative that you get this right to have a install that doesn't just "work", but is "right" and "safe".
 
  #3  
Old 01-24-08, 07:24 PM
ray2047's Avatar
Member
Join Date: Mar 2006
Location: USA
Posts: 33,597
Received 13 Votes on 11 Posts
Is a bare neutral even grandfathered. If this is newer NM doesn't #6-2 with ground have a smaller bare then the insulated conductors? Maybe this is a 240v only source. The stove could be 120/240v.
 
  #4  
Old 01-25-08, 10:31 AM
Forum Topic Moderator
Join Date: Feb 2005
Location: Near Lansing, Michigan
Posts: 10,944
Received 42 Votes on 40 Posts
What is the make/model of the stove so we can look up the manual online?

Is a bare neutral even grandfathered.
Sometimes, it's basically up to the inspector's judgment.
 
  #5  
Old 01-25-08, 10:50 AM
Unclediezel's Avatar
Member
Join Date: Dec 2006
Location: Northeastern PA.
Posts: 2,230
Received 0 Votes on 0 Posts
The stove could be 120/240v.
Wouldnt this REQUIRE a 4 wire ckt...?
 
  #6  
Old 01-25-08, 11:00 AM
Member
Join Date: Sep 2003
Location: Central New York State
Posts: 13,973
Received 0 Votes on 0 Posts
Originally Posted by Unclediezel View Post
Wouldnt this REQUIRE a 4 wire ckt...?
Not necessarily. A 120/240 volt stove can legally be connected to an existing three wire circuit, as long as the three wire circuit was legal at some point. This is just like a dryer.
 
  #7  
Old 01-25-08, 11:28 AM
Unclediezel's Avatar
Member
Join Date: Dec 2006
Location: Northeastern PA.
Posts: 2,230
Received 0 Votes on 0 Posts
Not necessarily. A 120/240 volt stove can legally be connected to an existing three wire circuit, as long as the three wire circuit was legal at some point. This is just like a dryer.
So the four wire is only "SAFETY" compliant? no other 'functional " differences?

I was lead to believe that 4 wires (120/240) were introduced to operate the newer style of electronic controls, and timers/clocks, as well as the "Safety " upgrade to older 3 wire systems.
 
  #8  
Old 01-25-08, 11:32 AM
Member
Join Date: Sep 2003
Location: Central New York State
Posts: 13,973
Received 0 Votes on 0 Posts
New installations are required to be four wire for stoves and dryers where the unit requires 120 and 240 volts.

Older installations were permitted to be three wire and existing older installations are grandfathered.

Clearly a four wire setup is safer and whenever possible three wire setups should be replaced.
 
  #9  
Old 01-25-08, 11:37 AM
Unclediezel's Avatar
Member
Join Date: Dec 2006
Location: Northeastern PA.
Posts: 2,230
Received 0 Votes on 0 Posts
"This is why I love this place"---thanks Bob..
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: