Transformer subpanel question

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mmiller

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I have a 480 delta to 240v delta transformer with a lighting tap.

Can I run 3 phase and 1 phase breakers in the same loadcenter (subpanel)

I would bring in the x4 lighting tap to an isolated neutral bar, that would be bonded to the ground bar.

obviously I would have to look out for the high leg for my 120 volt taps

thanks
Mike

Also I'm under 10' from transformer to panel, so I the primary OCPD would be all I need ? Or do I need a main breaker in the subpanel ?
 
I know of no reason you could not bring all conductors to one loadcenter.
Something you might want to keep in mind. I believe any transformer with this configuraton will have a severe limit on the load that can be placed on the neutral.. normally around 5% of the kva rating as I recall.

240.(4)(F) will require you to have secondary overcurrent protection.

Bonding and grounding electrode conductor connections shoud be at one location, either at the transformer or at the panel
 
Thanks

Thanks

The lighting tap will only be used for small auxillary equipment.....part counting scales and a radio....the essentials for the workers.

Mike
 
Orange tape it, high Leg on B phase

Orange tape it, high Leg on B phase

Thanks......

I was going to start looking for that info in my Ugly's book

This forum is so great.

I've learned so much here so far.

I absolutely won't touch anything hot ever, and my company thinks this is just fine and dandy. It's just worth it to me, and the company feels the same.

Unless I have figured out 100% what I have going on I won't do it.
 
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