DoItYourself.com Community Forums > Electrical, AC & DC. Electronic Equipment and Computers > Electrical - AC & DC

220

Thread Tools

Search this Thread

05-21-03, 12:53 PM

Pulldigm

Visiting Guest

Posts: n/a

220

I need to help a friend install a 220 circuit for a welding machine. It has been a long time since I did this kind of wiring. If someone can give me a refresher.
He has a 100amp breaker box. I need to put in a 220 breaker and put that direct to a 220 receptacle. Do I need a seperate fuse between the breaker and the receptacle.
If someone can tell me where I can find a wiring diagram on line it may help.
Please respond here or direct to pulldigm@yahoo.com.
Thanx.

Upvote

05-21-03, 02:57 PM

John Nelson

Member

Join Date: Sep 2000

Location: United States

Posts: 17,733

Upvotes: 0

Received 1 Upvote on 1 Post

A 240-volt circuit is installed pretty much the same as a 120-volt circuit. The rules for wire size, type, securing and protection are the same.

What's different?

You need a double-pole 240-volt breaker instead of a single-pole 120-volt breaker.
You attach black and white to the breaker, and nothing to the neutral bar.
You need to reidentify both ends of the white wire with black marker.
You need to use a 240-volt receptacle.

All else is the same. Choose the amperage rating of the breaker and receptacle based on the requirements of the welder, and choose the wire gauge based on the amperage rating of the breaker and the distance from the panel. These latter considerations are also done in the same way for 120-volt circuits.

Upvote

Thread Tools

Search this Thread

Show Printable Version

Email this Page

Electrical - AC & DC
Current Service

T

TOM498 on May 21, 2003

I'm looking at some options on my current service and have a couple of questions. 1.) How do I tell if my current service is 100 A or 200 A? It looks like there's 2 feeder lines coming in to 2 main breakers with 100 A on each. If this is 100 A, what's involved in upping it to 200 A (new feeder lines, panel, etc.)? 2.) There's no room for additional breakers in my panel. There's 2 breakers with 2 circuits wired in which I'd like to put on separate breakers and I'd like to add a couple of circuits. Do I have to put in a new panel, a sub panel or can I replace the existing breakers with 1/2" wide breakers and get more on the existing bus?
Electrical - AC & DC
outdoor lampost

D

domer on May 20, 2003

Why is the so many different color wires in the lamp post n how do you hook it up. I purchased a new light....basic black, white , n copper wires came with it. When I removed the old lampost there were also red and green wires......which goes where.....totally confused here...HELP!!!!!!!!:confused:

Ask a Question