Splice to Extend 4/0 and 2/0 feeder conductors

[solarken]

I need to extend some 4/0 line conductors and 2/0 neutral of an underground feeder about 6 feet. The conductors currently terminate on feed thru lugs of a meter-main outside, I will probably cut the conduit, pull the conductors out the bottom, and pull thru the wall inside to a junction box, and extend from there. Should I use a mechanical splice and heat shrink like this, or should I consider something else?

 

[LarryFine]

I have used them successfully many times. I suggest using a little compound and tightening it very well.

 

[marmathsen]

I have used them successfully many times. I suggest using a little compound and tightening it very well.

How do you tighten it? I typically would use a pair of channel locks to hold the connector while I torque it down

Rob G - Seattle

 

[LarryFine]

I typically would use a pair of channel locks to hold the connector while I torque it down

Eactamundo. The bigger for both, the better.

 

[ptonsparky]

I torqued a bit, moved to the other, torqued it the same, moved the connection around torque a bit more, repeat until suggested value obtained.

Or crimp a butt splice even better.

 

[electrofelon]

I need to extend some 4/0 line conductors and 2/0 neutral of an underground feeder about 6 feet. The conductors currently terminate on feed thru lugs of a meter-main outside, I will probably cut the conduit, pull the conductors out the bottom, and pull thru the wall inside to a junction box, and extend from there. Should I use a mechanical splice and heat shrink like this, or should I consider something else?
View attachment 2574409

I like those. What I like a bit better is the version that has two sets screws per side. A crimp would be best if you have the crimper for it. Personally I would put a layer of rubber tape then several layers of 88, them a heat shrink over it. Good for 100 years

 

[Seven-Delta-FortyOne]

Why not just a straight Polaris? I keep a dozen or so on the truck.