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Posted by Percival P. Cassidy on April 3, 2008, 3:10 pm
On 04/03/08 03:08 pm DerbyDad03 wrote:
>>> I was in Lowes last night and I noticed that none of the electric
>>> dryers had electric cords on them. Is that how they all do it?
>>> Reason why I'm asking is because a friend of mine needs a new dryer
>>> outlet, and it's the 3 prong style. I was wondering if I should put
>>> in a 4 prong in it's place so when that dryer goes the new one will
>>> just plug in. after my trip to the store, I'm more inclined to think
>>> that since maybe new dryers don't come with cords, maybe I should just
>>> put in another 3 prong plug since that's what the existing dryer has
>>> and any potential new dryer would need a new cord installed anyway.
>>> Can someone verify that?
>> The three-prong connectors (or hardwired connections) for dryers and
>> ranges is an old scheme that involved connecting ground to neutral
>> inside the appliance. It saved copper but is now regarded as unsafe,
>> and is against code in many places, certainly around here (where
>> dryers and ranges are sold with cords). Under certain circumstances, a
>> fault in a circuit or other appliance anywhere in the house could
>> result in the entire metal cabinet of the appliance carrying a 120V
>> charge, just as you're standing on the basement floor loading wet
>> laundry into it.
>>
>> Even if local code doesn't require it, I'd say put in a 4-prong outlet
>> (14-30R for a dryer, 14-50R for a range, and of course you'll need to
>> run new 4-wire cable of suitable gauge) and have such a cord installed
>> on the appliance. If the appliance is being converted from a 3-prong
>> setup, make sure the neutral-to-ground jumper is removed.
> er: the entire metal cabinet of the appliance carrying a 120V charge,
> just as you're standing on the basement floor loading wet laundry into
> it.
I don't think so: a properly installed 4-prong setup will have a
separate ground conductor to which the cabinet of the washer will be
connected. AIUI, it is not permitted to have the ground and neutral
connected anywhere other than at the main panel.
Perce
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