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Compressor hookup?


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Ok so I fianlly got everything moved into the new house. One of the first things I want to do is to hook up my compressor. You know before all the boxes are unpacked I need the comprssor hooked up. Anyway, the compressor has black, white and a green wire. At the old house I just hooked these up to a three wire dryer cord and went to town. The new house has a 4 pronged plug in the wall. I bought a new cord but, it has black, red, green and white. What do I do with the red wire?

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You need to be careful. I take it your compressor is 220V. In this case, chances are, the black and white wire on the compressor will connect to the black and red house wires. What I am uncertain about is whether your green compressor wire should hook up to the green or white house wire. It will make a huge difference, since doing it wrong could tie your ground and neutral wires together at a point away from the main breaker box.

 

Check through some of the old threads on this topic and PM the guys who said they were electricians.

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Pop N Wood:

 

You are indeed correct, the Black and Red wires are the two wires to connect for power, the ground would go to green, as the white wire is the neutral, which is the "return" for the 110/120/125 volt circuit in newer dryers. This also follows the standard for any 110/120/125 volt circuit of one hot wire and a neutral wire.

 

The only difference here of course is the extra hot to provide 220/240/250 volts.

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http://www.passandseymour.com/pdf/U077.pdf

http://www.passandseymour.com/pdf/U013-U020.pdf

 

http://www.sigmasystems.com/Techdoc/Tech_Docs/SigmaPowerPlugs.htm

http://leviton.com/pdfs/d-503/d-503T.pdf (see page 21)

http://www.danielwoodhead.com/pdf/139-172/163.pdf

 

http://techpubs.sgi.com/library/tpl/cgi-...i_html/apb.html

 

 

btw this may help, most garages need a welder or a lift, sooner or later so youll more than likely need a 220 volt outlet (30-100amp)

 

this wiring stuffs not hard to do, but use the correct gauge wire and the correct plugs and sockets for the application and ID strongly suggest useing a MINIMUM of 10ga wire for 110volt and 3/4" metalic conduit (use the correct single breaker rating for the application on the 110 volt)

110 v outlet end

black/power to the gold screw

white/neutral to the silver screw

green/ground to the green screw

 

110v at the box

black/power to breaker

white/ neutral to neutral bar

green/ ground to ground bar

 

and 4 GA on the high amp 230 volt applications,like WELDERS, little 230volt stuff like compressors and lifts get along fine with (4) 10 ga wires (use the correct dual breaker rating for the application on the 220 volt)

 

220v at the outlet

red feed to one hot

black feed to one hot

green to ground on plug

(optional but HIGHLY RECOMENDED)

second green to the conduit ground screw

 

220v at the box

red to one side of DUAL breaker

black to one side of DUAL breaker

green/ ground to ground bar

optional green/ ground to ground bar

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