Concentric Neutral & Spliter Box

[Train]

So we're out on a farm and have wanted to put all our overhead wire, underground. Power company is planning on redoing the main line out on the road and one of there guys said now is the time to do it because they'll move the transformer and clear all their lines at no charge to me. He suggested bringing the secondary from the transformer to a splitter box, and from there split of to the house, the shop and then the rest of the yard.

Now looking at the materials, I'm wondering how it works with concentric neatral running into the metal box, being that there's no insulation on it. Do you just make sure it's not contacting the box as it goes to the lugs, or does it need to be insulated somehow?

 

[Charles (in GA)]

You would not be using any kind of cable with a bare neutral or ground, in an underground installation.

Charles

 

[Train]

Look up USEB. You'll see what I'm talking about.

 

[Charles (in GA)]

Look up USEB. You'll see what I'm talking about.

You didn't tell us you were in Canada.

Alcan Cable’s USEB90 cables are specifically designed to connect the secondary side of the transformer to the meter base of your residential dwelling, light commercial, or specialized industrial application. USEB90 cables are comprised of two parallel cross-linked polyethylene insulated NUAL® conductors, a layer of concentric copper wires, and a PVC covering.

Features

Meets the requirements of CSA Standard C22.2 No. 52 and are prescribed by the Canadian Electrical Code
Can be buried directly or installed in ducts
90°C conductor temperature rating
Minus 40°C low temperature rating

 

[Train]

Thanks Charles, but all that I'm aware of. My question (which I'm having trouble wording) is when the concentric is twisted together, how is it taken care of within the box since it has no insulation.

Yes we're in the great white North. I should add that to my profile. So is this cable not allowed in the U.S.?

 

[canbug]

Twist the bare wires together and then give them a wrap of white tape. The wire will be bonded to ground in your panel.

Tim.