Blackburn U 1 N 11 INSUL AL SERV COMP SPLICE No10 No10

The U 1 N 11 is sized for #10 to #10 conductors, one run in each end. It is a two-conductor compression splice, so it joins one wire to one wire rather than tapping multiple runs into a single barrel. If your conductors are a different gauge on either side, this is the wrong body and you need the U-series barrel matched to those sizes.

It comes insulated, with a brown cap over the connector body, so the splice does not need to be taped or shrink sleeved after crimping. Colour coding matters on the job: brown identifies this particular die and conductor range, so crews standardising on a kit can pick the right barrel by cap colour at the truck.

It is built to ANSI C119.4, the standard covering connectors used between aluminum and copper conductors. That is the reference an inspector or a spec writer looks for on a service entrance splice, and it is stated on the product itself rather than inferred.

The connector body is 3-1/4 inches long overall. Add your crimp tool head clearance on top of that when you are working inside a meter socket, a pedestal, or a shallow gutter, because the tool needs room around the barrel, not just the barrel itself.

Compression is the right choice where the splice will be buried, direct-sealed, or otherwise not accessible for retorquing, since there is no screw to loosen over thermal cycling. The trade-off is that it is permanent and you need the matching crimp die and tool. If the connection has to be opened again later for troubleshooting or reconductoring, a mechanical set screw connector in an accessible enclosure is the better call.

Blackburn catalogue number U 1 N 11. That is the number to quote for the insulated aluminum service entrance compression splice rated #10 to #10, brown cap.

It is sold each, so quantity on an order is a straight count of splices, not boxes. That suits both a single service repair and a bulk pull for a multi-unit job where you are counting exact terminations. It is made in the United States.