120v from 240v panel

[ItsFrank]

Hello all, please forgive my ignorance but I want to know if you can branch out 120v circuits from a 240v 3 phase panel? I’m installing duplex receptacles (120v) but on the only panels available are 240v not 120/208v

 

[ptonsparky]

Do you have a hi leg?
Do you have meter?
Are you an electrician?

 

[ItsFrank]

To be honest, I’m not sure. The print I was given only has the layout and the reference to the panel which say “ PNL B 240v”
I’ll be able to look in the morning. I Will circle back tomorrow. Thank you

 

[ptonsparky]

Take pictures.

 

[ItsFrank]

Absolutely

 

[Seven-Delta-FortyOne]

How long you been an electrician for?

Can your J-Man help you out?

 

[ItsFrank]

Too long to have asked the question that’s for sure But sometimes you forget simple things. At least I do. Lol

I realize now I need to check phase to neutral and two of three should read out 120v with the high leg being 240v… right?

 

[ItsFrank]

…I should get 208v… I’m going to bed

 

[roger]

I agree with post #6 ask your on site supervisor to help you.

 

[ItsFrank]

 

[ptonsparky]

That tells us ...not much.
Need cover off. Back up so we can see the whole enclosure.
and as you know voltage to ground.
Those are 277 volt single pole breakers so I question it being fed 240 volt.

 

[ItsFrank]

 

[ItsFrank]

View attachment 2563963

 

[ItsFrank]

No power so it’s hard to take a good pic at the moment

 

[roger]

I realize now I need to check phase to neutral and two of three should read out 120v with the high leg being 240v… right?

Have you done this yet and no, the high leg will not be 240V

 

[ItsFrank]

I have not, there is no power to check. They demoed it back to the utility. I have to restore it.

 

[roger]

You will need to contact the POCO if you cannot somehow determine what the existing voltage is. Is the panel the service or is it fed from a feeder?

 

[ItsFrank]

 

[ItsFrank]

I’m supposed to branch out of panel “A”

 

[ptonsparky]

Black, red, blue would have been typical marking for a 208/120 in this area. Doesn't mean anything if you are starting over. POCO is who you need to call.