Splices Preference

[Alwayslearningelec]

I have some existing larger size feeders coming into a distribution panel.

They want the panel interiors demoed and use the backbox as a splice box proving a new cover.

I then need to extend these feeders about 30'.

Spec aside, what would be your preferred method/material of splicing #4/0, #2/0 and #3 copper THHN. Compression, mechanical?

 

[Alwayslearningelec]

This is what spec calls for...

 

[infinity]

IMO if they're willing to accept a split-bolt they'll accept just about anything.

We would likely use a Polaris style connector to join the conductors together.

 

[don_resqcapt19]

It is it up to me it would be long barrel compression lugs with heavy duty heat shrink. If I write specs, they will require exactly that.

 

[Tulsa Electrician]

Parrelle sets?
Just curious.

 

[masterinbama]

It is it up to me it would be long barrel compression lugs with heavy duty heat shrink. If I write specs, they will require exactly that.

Same for me, but I like the cold shrinks better than heat shrinks

 

[Alwayslearningelec]

It is it up to me it would be long barrel compression lugs with heavy duty heat shrink. If I write specs, they will require exactly that.

Just curious. So something like this but for properly sized for the conductor?

 

[Alwayslearningelec]

Parrelle sets?
Just curious.

Nope.

 

[Tulsa Electrician]

Thanks

Nope.

 

[don_resqcapt19]

Same for me, but I like the cold shrinks better than heat shrinks

I like the heat shrink better, unless I am outside on a very cold day. In that case I will use a cold shrink, but in good weather or inside it will always be heavy duty heat shrink with the internal glue/sealant for me.

 

[electrofelon]

Spec aside, what would be your preferred method/material of splicing #4/0, #2/0 and #3 copper THHN. Compression, mechanical?

I would probably use Blackburn H-taps. They are super cheap and quick, have optional snap on plastic covers. 7 connector program does almost any combination up to 2 250's with just two dies.

Blackburn® WR179 Type WR Wide Range Compression H-Tap Connector, H, 3 to 1/0 AWG Main/Run, 6 to 4 AWG Tap, Aluminum | SMC

Blackburn® Compression H-Tap Connector, Type WR Wide Range, H, 3 to 1/0 AWG Main/Run Size, 6 to 4 AWG Tap, ACSR/Aluminum/Copper/Solid/Stranded Conductor, O Die Code, 0.266 to 0.398 in Dia Conductor Main, 0.162 to 0.266 in Dia Conductor Tap, 2-Conductor, 90 deg C, Aluminum, 1-7/8 in L

www.smcelectric.com

 

[tom baker]

It is it up to me it would be long barrel compression lugs with heavy duty heat shrink. If I write specs, they will require exactly that.

Exactly that is the best

 

[Alwayslearningelec]

Thanks everyone.