New Stove, Old Wiring

[JohnDS]

Hey guys, i'm sure you heard this question before but i can't seem to find the answer. My question is, if you have a new stove and you want to connect it to your old wiring, is it allowed to wire the 2 hots and ground to your 4 wire stove terminals on the new stove by bonding the ground to the neutral? I'm confused because i heard arguments on the matter time and time again with the old code and the new code. Please help.

 

[celtic]

250.140 addresses this question.

On the back of the NEW stove, there *should* be a bright orange sticker that also states this information and that the change was made sometime in the 90's ('93 or '96...I forget)

Section 250.140(4) applies only to existing branch circuits supplying the appliances specified in this section. The grounded conductor (neutral) is no longer allowed to be used for grounding the metal non–current-carrying parts of the appliances listed in 250.140. Branch circuits installed for new appliance installations are required to provide an equipment grounding conductor for grounding the non-current-carrying parts.
Caution should be exercised to ensure that new appliances connected to an existing branch circuit are properly grounded. An older appliance connected to a new branch circuit must have its 3-wire cord and plug replaced with a 4-conductor cord, with one of those conductors being an equipment grounding conductor. The bonding jumper between the neutral and the frame of the appliance must be removed. If a new appliance is connected to an existing branch circuit without an equipment grounding conductor, where the neutral conductor was previously used for grounding the appliance, a bonding jumper must be installed at the appliance terminal to connect the frame to the neutral.

(Commentary following 250.140 '02 NECH)

 

[Towzzer]

I believe most stoves come set for 3-wire already, They bond the body of the machine to the ground(neutral) terminal. If you were doing 4 wire you would remove this connection.

 

[JohnDS]

thanks guys.

 

[LarryFine]

John, when placing a new appliance on an existing circuit and receptacle, the proper method is to install matching a 3-wire cord'n'plug, being sure to bond the EGC and neutral together.

 

[frenchelectrican]

250.140 addresses this question.

On the back of the NEW stove, there *should* be a bright orange sticker that also states this information and that the change was made sometime in the 90's ('93 or '96...I forgot )

it was enforced in way back in 93 code cycle but there were few local area did have addmented dated way back more further

Mobile Home is one of them
Chicago been in the local code for very long time i am not sure when they did enforce that one i think way back in 60-70's era

that two item i know of it will stated clear

the mobile home was in NEC sec 550 [ i may be wrong in the numbers ]

Merci , Marc

 

[celtic]

John, when placing a new appliance on an existing circuit and receptacle, the proper method is to install matching a 3-wire cord'n'plug, being sure to bond the EGC and neutral together.

...but ONLY if the existing system is 3 wire

 

[Jim W in Tampa]

The old 3 wire system was 2 hots and a neutral,it was not a ground.NEC is about premises wiring not appliances.Simply replace the cord.Do not forget to bond the frame to the neutral.