Re: CHOOSING WIRE SIZE AND WELDING

Posted by kencombs on October 19, 2022 at 11:05:38 from (108.208.32.113):

In Reply to: CHOOSING WIRE SIZE AND WELDING posted by John T on October 19, 2022 at 09:46:09:

JohnT, I understand completely that there are standards that an engineering firm would adhere to as a matter of principle. Better than code is never a bad thing.

But, my installation mentioned earlier conforms to the NEC articles governing wiring for welding machines, and only welding machines.

I would never wire a general purpose outlet to that standard. As stated earlier, dedicated welder outlets should be labeled as such. If I plugged one of my big electric heaters into my dedicated welding outlet, breaker would trip before damaging anything. Because, I follow the 'golden rule', breakers are to protect the wiring. So, my 30a would open before the 10ga wire overheated and certainly before the 50a recpt was damaged.

Below is copied for Geo's post and is what informed my choice of methods.
[quote=CVPost-Geo-TH,In](quoted from post at 16:57:22 10/18/22) The duty cycle of the 225 lincoln is 20%.

Table 630.11(A) Duty Cycle Multiplication Factors for Arc Welders
Duty Cycle Multiplier for Arc Welders
Nonmotor
Generator Motor
Generator
100 1.00 1.00
90 0.95 0.96
80 0.89 0.91
70 0.84 0.86
60 0.78 0.81
50 0.71 0.75
40 0.63 0.69
30 0.55 0.62
20 0.45 0.55

So what does this mean?? I'm not a lawyer or an educated electrician.

Does it mean you multiply 50 amps By .45 = 22.5 amps?

If so, 10g wire and a 30 amp breaker are good to use and in compliance with .NEC code ??

The power cord is 12g wire and 12g wire is rated at 20 amps.[/quote]

That is right out of the NEC. And he interpreted it correctly.

Not intended to be argumentative at all, just informative.

Each and everyone of us should practice code compliant and safe methods.

Replies:

• Re: CHOOSING WIRE SIZE AND WELDING John T 12:46:04 10/19/22 (0)

Add a Reply! You must be Logged In to Post Name: E-Mail: Subject: (avoid special characters) Comments: Optional Link URL: Link Title: Optional Image URL: Optional Video Title: Optional Video Embed: Advanced Posting Options Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks. No political comments, hate speech or bigotry of any kind will be tolerated. Violations will be removed and posting privileges may be permanently revoked without notice.   Advanced Posting Tools   Select Gallery Photo  Attach Serial No List  Return to Post  Upload Photos/Videos Choose Files from your local computer Upload one or more videos to your post. Photo and video filesizes should be less than 5MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.

TRACTOR PARTS	TRACTOR MANUALS

We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]