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Old 01-07-2011, 07:43 PM   #16
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Wiring for new 220V Dryer question


My point was
A) You are in NYC, and
B) You are in a multi-family dwelling.

Two things that preclude you from doing any electrical work there. From what I am reading that does not seem to matter to you. You seem intent on doing this yourself anyway.

Just so you know. No, I am not in NYC. No, I have absolutely no vested interest in anyone working in NYC.

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Old 01-07-2011, 09:42 PM   #17
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Wiring for new 220V Dryer question


One point here that no one has made:

IF you are using "Armored Cable" or type AC cable, then you only need 10/3. The grounding connection is made by the armor itself. Notice that all the other circuits in your place utilize this method of grounding, since there are no green wires present on your ground bar.

BUT, if you use type MC cable (metal clad), then it can have a green conductor present. THAT will need to be connected to the ground bar.

In either case, you need 10/3. Proper connection to the metal enclosure of your load center, and at the receptacle box are required to ensure a good ground.

If you buy 10/4, then it will have an additional blue conductor in it, which you won't need. And you will have wasted a bunch of $$$ paying for it.
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Old 01-07-2011, 11:21 PM   #18
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Wiring for new 220V Dryer question


Yeah... small note about cabling nomenclature. 10/4 means you have 5 wires in it. The ground wire isn't counted, 10/3 is what you're looking for (assuming 10 gage is appropriate) to have 2 hot wires (black and red), 1 neutral (white) and 1 ground (bare copper).
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Old 01-08-2011, 12:15 AM   #19
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Wiring for new 220V Dryer question


Quote:
Originally Posted by WillK View Post
Yeah... small note about cabling nomenclature. 10/4 means you have 5 wires in it. The ground wire isn't counted, 10/3 is what you're looking for (assuming 10 gage is appropriate) to have 2 hot wires (black and red), 1 neutral (white) and 1 ground (bare copper).
Thanks for your input KB & Will,
in doing a little more reading on the Dryer I'm considering, the manufacturer is saying that if the distance from the box is more than 15 feet, they want you to use #8 wire. does that not seem a little excessive? I mean I think the main run up to the apartment is #6.
The BX that I've come across here in NYC doesn't have a bare ground. 12/2 is just 2 #12 (black & white) conductors in steel armor, which is the ground conductor. Could that be a regional thing? I did see the MC cable at Home depot a while back, and it does have the green insulated ground wire inside. The guy there said that was because the Metal Cladding is aluminum as opposed to steel and contractors may use it because it's lighter.
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Old 01-08-2011, 12:30 AM   #20
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Wiring for new 220V Dryer question


What is your system voltage there? I'd be willing to bet you are on a 208 Volt service. Keep in mind that this will affect your heating wattage.

Electric dryers are typically rated at 5000 watts ... on a 240 Volt source. Connect the same dryer to a 208 Volt source, and your heating will only be 3750 watts. Might take longer to dry a load ...

As for upgrading to a #8, unless it's a really long run (over 100 feet) I wouldn't worry about it.

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