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#69791 - 09/19/06 02:18 PM Oven hook-up (3 - 4wire)
aldav53 Offline
Member

Registered: 08/22/01
Posts: 547
Loc: Chandler, AZ USA
This is old subject, but still can't figure out why on a new oven ckt, the manufacturer says you can use a 3 or 4 wire ckt. The oven controls must be 120v, which would mean you'd be tying the neutral to the ground at the oven (cause they are 4 wire) and the ground would then be part of the current carrying path back to the panel on a 3 wire ckt. Is this code for new ovens?
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#69792 - 09/19/06 02:41 PM Re: Oven hook-up (3 - 4wire)
iwire Offline
Moderator

Registered: 01/05/03
Posts: 4343
Loc: North Attleboro, MA USA
The code used to allow us to install 3 wire range and dyer outlets in certain locations.

 Quote:
which would mean you'd be tying the neutral to the ground at the oven


No the code did not allow that, what they did allow was using the neutral as the grounding means.

You say 'hey thats the same thing'. It's close to the same thing but it requires that the conductor be insulated.

Now the code will not let us install 3 wire range and dryer outlets. But existing ones can remain so when the customer gets a new range they need to buy a power cord that fits the outlet they have and they have to either bond or un-bond the neutral to frame.
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Construction & Maintenance Electrician
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#69793 - 09/19/06 02:50 PM Re: Oven hook-up (3 - 4wire)
aldav53 Offline
Member

Registered: 08/22/01
Posts: 547
Loc: Chandler, AZ USA
Which one would it be, bond or not bond the neutral to the frame.
Thanks,
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#69794 - 09/19/06 03:02 PM Re: Oven hook-up (3 - 4wire)
iwire Offline
Moderator

Registered: 01/05/03
Posts: 4343
Loc: North Attleboro, MA USA
If the outlet is 3 wire you must bond the neutral to the frame of the appliance

This is done by a jumper at the point on the oven where the supply cord connects.

If it is a 4 wire outlet you want to make sure to lift the bond.
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#69795 - 09/19/06 05:48 PM Re: Oven hook-up (3 - 4wire)
Celtic Offline
Member

Registered: 02/26/05
Posts: 367
Loc: NJ
Here's a tangent to this...

We recieved a delivery of electric ranges...the order stipulated that the ranges have the cords attached...the ranges have a 4-wire cord attached...the range itself has a the jumper still installed between N-G.
These ranges are being installed in new construction.

Who would say is responsible for checking that connection?
- The Appliance Co. where they were ordered from
- The GC that ordered them
- The EC that installs them
- Check the contract

[This message has been edited by Celtic (edited 09-19-2006).]
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#69796 - 09/19/06 05:54 PM Re: Oven hook-up (3 - 4wire)
ShockMe77 Offline
Member

Registered: 06/11/05
Posts: 823
Loc: Rahway, New Jersey
^^

I would say it's the responsibility of the EC.

Why?

Because you are the professional electrician who knows the importance of when to bond and when not to. And if we don't do it, who will? I like to think of as having some integrity.

That's my opinion. Perhaps the legality of it is something different all together.

[This message has been edited by ShockMe77 (edited 09-19-2006).]

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#69797 - 09/19/06 06:54 PM Re: Oven hook-up (3 - 4wire)
HLCbuild Offline
Member

Registered: 12/05/04
Posts: 206
Loc: Herndon,Va USA
Cord or no cord, I'll bet there are installation instructions that tell you if you are using a 4-wire configuration then you must remove the jumper. So the installer is responsible to follow the manufacturers instructions.

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#69798 - 09/19/06 08:05 PM Re: Oven hook-up (3 - 4wire)
Celtic Offline
Member

Registered: 02/26/05
Posts: 367
Loc: NJ
The installer being the EC who installs the appliance or the installer who installed the cord?
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~~ CELTIC ~~
...-= NJ =-...

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#69799 - 09/19/06 08:38 PM Re: Oven hook-up (3 - 4wire)
ShockMe77 Offline
Member

Registered: 06/11/05
Posts: 823
Loc: Rahway, New Jersey
The electrical contractor.

If the cord comes with the appliance (wich it seldom does), the installer at the factory has NO IDEA if the range is going into a new home or into an existing home as a replacement. My experience has been to bring both type cords with me to save on those pesky trips to the suppy house.

Speaking of the supply house, I have to get to mine in about 7 hours so time to get some sleep!

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#69800 - 09/19/06 08:56 PM Re: Oven hook-up (3 - 4wire)
gfretwell Offline

Member

Registered: 07/20/04
Posts: 9045
Loc: Estero,Fl,usa
They do ship with cords attached if you order them that way. I can't imagine a builder ever ordering anything but 4 wire corded appliances. There should never be a 3 wire range or dryer plug in new construction. If the jumper is installed it is a factory problem.
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