4-prong plug into 3-prong outlet


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Old 11-08-18, 09:15 PM
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4-prong plug into 3-prong outlet

This new cooktop (240V, 30A) came with a 4-prong NEMA 14-50 plug; the kitchen outlet is only a 3-prong 10-50.

Was wondering if it is always possible to replace the cord that came with the cooktop by a cord with a 3-prong plug (like many people do for electric dryers) bridging the Grounded Screw and the Neutral Terminal with a jumper? Or is it only possible if the installation manual specifically says so?

Would greatly appreciate any comment and suggestion! Thanks, h.
 
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Old 11-08-18, 11:35 PM
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is always possible to replace the cord that came with the cooktop by a cord with a 3-prong plug
That
is the only acceptable way. The connection at the stove will need to be modified according to your stoves manual.
 
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Old 11-09-18, 08:09 AM
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Thank you, Ray! Yes, will see if the manufacturer allows any rewiring.
 
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Old 11-09-18, 10:55 AM
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Some of the high tech ranges like induction cookers do not allow rewiring, but every standard range I've seen allows cord replacement and bonding of the neutral and ground inside the range wiring compartment.
 
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Old 11-09-18, 11:52 AM
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Thanks, ibpooks! You are right! I've got it wrong: the cooktop cord has three wires -- red, black, and green and no plug; it should be ready as is for a three-prong outlet. The wall oven, however, has a four-prong plug. I will consult with the manuals tonight to see if any tampering with the factory cord is allowed.
 
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Old 11-09-18, 03:02 PM
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Check the manual and see if it mentions anything about 3 prong or rewiring the cord.
Most ranges and dryers don't come with cord attached because they have no way of knowing which receptacle the customer has.
Most cooktops and wall ovens come with just a whip so the customer can wire in 3 wire or 4 wire depending on what they have.
 
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Old 11-12-18, 10:57 AM
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This new cooktop (240V, 30A) came with a 4-prong NEMA 14-50 plug
The cord with plug obviously didn't come from the factory or it would be a 30 amp cord and not a 50 amp cord. I'd ask the store where you bought the cooktop who put the wrong cord on it and why did they do it? My guess is the installation instructions call for it to be hardwired.
 
 

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