Replies

1. 
   JeffinPA | Mar 01, 2009 06:44pm | #1

   Code now requires a 4 wire installation.

   The old way was Black-black, red-red, ground-white.  (The ground wire coming from the panel was used as the neutral)

   Now you are required to run a 4 wire back to the panel so that you have both a neutral and a ground wire connected to the cooktop.

   I wont suggest that you hook it up otherwise.

1. 
   gfretwell | Mar 01, 2009 08:51pm | #4

   Actually the neutral was used as the ground. (a subtle difference)
   The code only requires the 4 wire circuit if you are running a new one. You can still hook up to the 3 wire.
   There wasn't really a body count tied to the code change in 1996. It was just done for uniformity.

1. 
   edwardh1 | Mar 01, 2009 08:59pm | #5

   Check the size wire required on the new cooktop- mine - a GE required a switch from the old 10 ga 30 amp to a 8 gage 40 amp. even tho it waas just barely into 8 gage ampacity

2. 
   Dam_inspector | Mar 01, 2009 07:14pm | #2

   I wouldn't connect the white and green together.

3. 
   MrBill | Mar 01, 2009 08:45pm | #3

   Cabin,

    

    I am not an electrician so you can take this as you like but.....

    Read the instructions. Code does require 4 wires IF you are running a new circuit, but if you already have a three wire run, you tie the neutral to the ground at the cooktop. I just did this exact thing when we replaced our oven about a year ago. The installation instructions made the procedure very clear.  There was a terminal supplied in the range to tie the two together.

   Bill Koustenis

   Advanced Automotive Machine

   Waldorf Md

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   Edited 3/1/2009 12:47 pm ET by MrBill

   
   

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   Edited 3/1/2009 12:47 pm ET by MrBill