30A 250v plug

[Brushhill dave]

Thanks

 

[Rock knocker]

Please note: I am not an electrician or an electrical professional. Please defer to electricians who disagree with me on this topic.

One thing to keep in mind is that the NEC allows you to derate the wire gauge that feeds a receptacle if the receptacle is only ever used for an intermittent-use appliance like a welder. This is because the welder's duty cycle is less than 100%, so the heat that it puts into the wiring will be less than if it was something like an electric motor, which is basically 100% duty cycle. The relevant table of the NEC is 630.11(A):

View attachment 313446

Wow, the chart references motor generators! I'll bet there aren't too many of those running anymore. In fact, I bet there aren't too many on this board who've ever seen one in action (Shield-Arc and Arcweld excepted).

Five points to the first poster who knows what a motor generator is

 

[CNC Dan]

Wow, the chart references motor generators! I'll bet there aren't too many of those running anymore. In fact, I bet there aren't too many on this board who've ever seen one in action (Shield-Arc and Arcweld excepted).

Five points to the first poster who knows what a motor generator is

AC eletric motor coupled to a DC generator.

 

[k0ua]

Wow, the chart references motor generators! I'll bet there aren't too many of those running anymore. In fact, I bet there aren't too many on this board who've ever seen one in action (Shield-Arc and Arcweld excepted).

Five points to the first poster who knows what a motor generator is

In my old line of work, long long ago (yes I have a white beard). we had motor generators, for mobile applications that had a DC motor that shared a common shaft with an AC generator that generated various AC voltages that were rectified and turned back into various DC voltages. This is before the invention of the transistor. and transistorized power supplys for high voltage applicaions.

james K0UA

 

[woodlandfarms]

We had a motor generator (small, portable) that ran on 12V DC and made 120AC. You used it to power OLD studio movie cameras on location as they all ran on 120AC.

 

[Shield Arc]

I know I've used several different types of motor generators made by Lincoln. But refresh my memory, did Miller ever make any?:confused3:

 

[Rock knocker]

AC eletric motor coupled to a DC generator.

Your points are in the mail

 

[Rock knocker]

I know I've used several different types of motor generators made by Lincoln. But refresh my memory, did Miller ever make any?:confused3:

You're asking us? Wow!

I think so, it's been a real long time, but I remember us owning a dinosaur poop encrusted motor-generator where I used to work. It was painted blue, and came from either Utah Power and Light, or Lechenby Corp. from Harbor Island.

 

[Brushhill dave]

Well it turns out power is not a

Problem. I have a 200amp service panel and it feeds my 3 power locations in my yard so I have ample power for most any machine I want.

 

[Arc weld]

I don't believe Miller ever made a DC generator. All their portables were 3 phase alternator based with rectifiers to convert it to DC. For other than welders DC was used because it easier to control the speed with DC and still have full torque. If you look at draglines, only relatively recently have they gone to AC drive. If you look at a machine like Big Muskie that was the biggest dragline ever made, it had at least 6 5000 HP AC motors powering DC generators for the motors that operated the machine functions and propel hydraulics.