3 Phase??

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Alwayslearningelec

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NJ
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Estimator
I getting a temp panel with breakers in it. One for the welder. THe 3 Phase is throwing me off. Would that mean the panel needs to be 3 phase or the breaker. But it says 220V??

"In the temp panel iron workers welder needs a breaker... 30 Amp – 220 V – 3 Phase"
 
I’m not exactly sure what you’re asking. Are you saying you have 3phase loads that need to be fed and need to know or not if your temp panel needs to be 3phase?

What power source is available at the location?
 
Dsg319 said:
I’m not exactly sure what you’re asking. Are you saying you have 3phase loads that need to be fed and need to know or not if your temp panel needs to be 3phase?

What power source is available at the location?
Click to expand...
He's saying 3 phase but also 240v. That's what's confusing me? So the panel would need to be 3 phase or the breaker for his welder?
 
Alwayslearningelec said:
I getting a temp panel with breakers in it. One for the welder. THe 3 Phase is throwing me off. Would that mean the panel needs to be 3 phase or the breaker. But it says 220V??

"In the temp panel iron workers welder needs a breaker... 30 Amp – 220 V – 3 Phase"
Click to expand...
It looks like the welder wants to see a 30A 240V delta supply. Three phase panel and breaker, and the service voltage needs to be 3P 240V.
 
Alwayslearningelec said:
He's saying 3 phase but also 240v. That's what's confusing me? So the panel would need to be 3 phase or the breaker for his welder?
Click to expand...
You have to have a 3phase panel to serve a 3phase load.

3phase 240v delta as mentioned is a normal but not all to common power source.

I’m unsure of operating a 220v welder at 208v nominal I’m sure it would work fine.

You need to know the power supply source configuration before getting the panel and breakers. If you have 240 delta high leg service certain care needs to be taken on placing line to neutral loads throughout the panel.
 
On a side note. Any of you guys ever install "drops" out of a panel for tools etc. to plug into? What "cable" do you use for this tail? Romex or some other cord?
 
3 phase can be any voltage at all.

You are used to seeing 208/120V wye as a common 3 phase system. And the welder might work fine with it.

But you were told either 220 or 240V 3 phase, which is a higher voltage.

The previously mentioned 240V delta is probably the most common way to get 240V three phase. This could be 240/120V 'high leg delta'.

Less common is 240/139V wye.

1) what voltage systems are available at the facility?

2) What is the actual welder nameplate info?

Jon
 
Alwayslearningelec said:
On a side note. Any of you guys ever install "drops" out of a panel for tools etc. to plug into? What "cable" do you use for this tail? Romex or some other cord?
Click to expand...

I've seen and done this. Never liked it. When I've seen it it has often been SO cable with incorrect cord grips. You really want to use proper strain relief.

IMHO far better to have a 50A receptacle mounted next to the panel, and use that to feed 'spider boxes' for the tools.

-Jon
 
I have done a lot of welders. Guessing can be a bad thing.
If they will not supply specs let them know what you can supply with a disclaimer.
 
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