http://www.csgnetwork.com/wiresizecalc.html
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 using a MINIMUM of 10ga wire for 120volt and 3/4" metallic conduit (use the correct single breaker rating for the application on the 120 volt)
120 v outlet end
black/power to the gold screw
white/neutral to the silver screw
green/ground to the green screw
120v at the box
black/power to breaker
white/ neutral to neutral bar
green/ ground to ground bar
and 6GA-4 GA on the high amp 230 volt applications,like WELDERS, little 230volt stuff like compressors and lifts get along fine with (3 or 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 RECOMMENDED)
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
Paste the link above in a new tab, and there is an illustration.
This will help you figure out how to attach them to the panel. Each outlet is different based on ampacity. I think there is a 30A 220 shown
This is for a 220V receptacle without a neutral path (Two prong with ground)
The red and black are power wires that attach to the terminals marked either x or y individually
for example:
Black wire = x (Brass screw)
Red wire = y (Brass screw)
bare / green = G (green screw)
This is for a 220V receptacle with a neutral path (Three prong with ground)
The red and black are power wires that attach to the terminals marked either x or y individually
for example:
Black wire = x (Brass screw)
Red wire = y (Brass screw)
White wire = W or N (Silver screw)
bare / green = G (green screw)
A QUICK NOTE ON WIRE GAUGE: 10 gauge wire is heavier than 12 gauge wire, 8 gauge is heavier than 10 gauge and so on
How 220v works with 4 wires: (one wire to each)
1 Black wire carries 120v
1 Red wire carries 120v
1 White wire acts as a common
1 Green wire acts as a ground
How 220v works with a 3 wires:
1 Black wire carries 120v
1 Red/White wire carries 110v (if you use white flag it with red electrical tape)
1 Green wire acts as a ground/common


120 volt

220 volt



most guys will want a 30 amp two pole 220 volt rated switch controlling the outlet


LINKS THAT MAY HELP
http://www.csgnetwork.com/wiresizecalc.html
http://code.necplus.org/sample/document ... cs70-300.5
http://www.nojolt.com/Understanding_240 ... uits.shtml
http://www.ehow.com/how_5614909_wire-22 ... utlet.html
http://www.xomba.com/how_to_wire_a_220v_wall_outlet
http://www.selfhelpandmore.com/home-wiring-usa/
http://www.mlec.com/Homeown.htm
http://www.passandseymour.com/pdf/U077.pdf
http://techpubs.sgi.com/library/tpl/cgi ... l/apb.html
http://www.homedepot.com/Electrical-Bre ... ogId=10053