Power distribution question

KTOKTO

Member
2014-09-06 11:36 pm
Hello,

I have a question regarding AC power distribution, bear with me here as I don't know much of anything about AC power.

We have an upcoming show with access to 220 AC power with this 14-50P receptacle.

[IMGDEAD]http://i63.tinypic.com/k12a2v.jpg[/IMGDEAD]

I need to find a reasonably affordable solution to break this out to a set of 110 AC outlets.

I am doing some initial researching on amazon and am wondering if the following will work.

Start with this 14-50 male to 14-30 twist lock connector

https://www.amazon.com/Conntek-14335-1-5-Foot-Adapter-Connector/dp/B001TO1D1G/

then from from the 30a twist lock connector in to this distribution box

https://www.amazon.com/CEP-Construction-Electrical-Products-6503GU/dp/B000KL4I2K/

I believe this distribution box is taking 220v in and splitting in to the two 110 breakers.

Does this look like a sound idea? Thank you in advance.
 

wg_ski

Member
2007-10-10 5:21 pm
You're lucky you have that outlet and not something like a dryer plug (where you can't easily make it legal). Don't use a bunch of adapters. Go directly from that plug to a proper distribution box. Put that plug on the end of a #6/3 with GND and run into a standard breaker box. Run as many 120V outlets as you need (within reason, the main outlet will only let you average 50 amps per side), each with its own 15 or 20A breaker. Or 30A twist lock if some of your equipment uses those. Use grounded metallic conduit to enclose and run everything, with proper surface mount boxes. No plastic homeowner grade junk. No smurf. Mount everything to a sturdy surface. If it's going to be outside in the open and not under cover, use outdoor rated weatherproof boxes with hinged covers (and you may as well use GFCI's). And inside your panel, use separate ground and neutral busses - this is the big one. And what''s it cost? Another $5 to add the other terminal block?

Yeah, a small 4 outlet rig is likely to cost a little over $100. But if you build it right an inspector probably won't shut you down the instant they see it, and it won't give you any trouble.
 

KTOKTO

Member
2014-09-06 11:36 pm
You're lucky you have that outlet and not something like a dryer plug (where you can't easily make it legal). Don't use a bunch of adapters. Go directly from that plug to a proper distribution box. Put that plug on the end of a #6/3 with GND and run into a standard breaker box. Run as many 120V outlets as you need (within reason, the main outlet will only let you average 50 amps per side), each with its own 15 or 20A breaker. Or 30A twist lock if some of your equipment uses those. Use grounded metallic conduit to enclose and run everything, with proper surface mount boxes. No plastic homeowner grade junk. No smurf. Mount everything to a sturdy surface. If it's going to be outside in the open and not under cover, use outdoor rated weatherproof boxes with hinged covers (and you may as well use GFCI's). And inside your panel, use separate ground and neutral busses - this is the big one. And what''s it cost? Another $5 to add the other terminal block?

Yeah, a small 4 outlet rig is likely to cost a little over $100. But if you build it right an inspector probably won't shut you down the instant they see it, and it won't give you any trouble.

Thanks for the reply. I was hesitant to go with a home made breaker box because I though that is what inspectors are going to bark at. I do have the ability to build a breaker box like you mentioned, I just thought that was the "no no" and why I was leaning towards the 30a box and the dog bone in the first post.

Thanks for the info.
 

KTOKTO

Member
2014-09-06 11:36 pm
You're lucky you have that outlet and not something like a dryer plug (where you can't easily make it legal). Don't use a bunch of adapters. Go directly from that plug to a proper distribution box. Put that plug on the end of a #6/3 with GND and run into a standard breaker box.

I just purchased a distribution box like in my original post with the correct 50a plug.

Thanks again.