delta 3 ph high leg, use the 208v single pole for lighting ?

[Stevenfyeager]

A friend's church has every 3 rd space empty because 208 to ground is rarely used. But his question:> "since LED commercial lighting fixtures are rated for 120-277 v, he is thinking on using those spaces for some lighting. If that is advisable, does he use 208 single pole breaker as he hopes to?

 

[tortuga]

I would not use it, you would need a single pole straight rated breaker for 240V.
In a 240 Delta building, with a large parking lot, I'd do a 3 pole 240V breaker to the parking lot lights and wire them for 240 L-L, no neutral needed.
That way you can use all 3 phases evenly. However you have to carefully size the circuit.

 

[LarryFine]

You should not use the high-leg-to-neutral 208v as a source.

There is a longer thread discussing this now.

 

[Stevenfyeager]

You should not use the high-leg-to-neutral 208v as a source.

There is a longer thread discussing this now.

I see that, thank you. We both started yesterday. I will stop here.

 

[ptonsparky]

You could rearrange some loads to free up an adjacent spaces and use a 3 pole breaker as Tortuga suggests. A three pole 20 will feed a lot of LED fixtures.

 

[TwoBlocked]

You should not use the high-leg-to-neutral 208v as a source.

There is a longer thread discussing this now.

Oh! Got a link to that thread?

 

[ptonsparky]

It's in the Education unit

 

[Little Bill]

Oh! Got a link to that thread?

120/240V 3PH 4WIRE (DELTA)

I have an industrial lead melter that requires 208V-1PH which I can take from the disconnects center high phase leg to ground. Question: what happens to the equipment ground should it stay connected or does it have to be disconnected?

forums.mikeholt.com

 

[Little Bill]

I will close this thread as it's almost the same as the link posted above.