Fine stranded DLO cable

[dm9289]

In looking over an install in the factory that I work. The contractors ran 4/0 DLO finely stranded essentially RHW2. They connected to a circuit breaker by using the hex head screws to smash/connect the wire. I was trying to look at the cut sheet and did not see anything prohibiting it but it just seems wrong help!

 

[LarryFine]

You need lugs suitable for fine-stranded wire.

 

[dm9289]

You need lugs suitable with fine-stranded wire.

Yep that’s m 95% sure they are not I’m trying to get lug kit number

 

[LarryFine]

You should also be able to find adapters or sleeves.

 

[dm9289]

You should also be able to find adapters or sleeves.

As a general rule I don’t believe this type of lug is meant for stranded. Cannot take cover to get kit number

 

[infinity]

They make a copper wrap for those fine strand condcutors that I've seen used with standard terminals.

e

 

[LarryFine]

They make a copper wrap for thos fine strand condcutors that I've seen used with standard terminals.

That's what I meant by sleeves. And there are pin terminal adapters.

 

[kwired]

As a general rule I don’t believe this type of lug is meant for stranded.

Not meant for fine stranded. Pretty much everything larger than 8 AWG is typically going to be stranded. Some grounding/bonding conductors being the exception.

 

[dm9289]

That's what I meant by sleeves. And there are pin terminal adapters.

I was thinking that direction

 

[dm9289]

They make a copper wrap for those fine strand condcutors that I've seen used with standard terminals.

View attachment 2569523e

Wow! That’s new to me

 

[Speedskater]

Industrial systems use ferrules when fine strand wire is used under screw terminals.

 

[dm9289]

Industrial systems use ferrules when fine strand wire is used under screw terminals.

That’s what I expected to see. But ……

 

[Birken Vogt]

Cummins generators use wraps of ordinary copper on DLO or similar cables into normal lugs. I carry sheets of it on the truck, cut it with scissors.

 

[petersonra]

Many mechanical lugs these days are listed for use with fine stranded wire.

Imo, wrapping the fine strands in heavy copper foil is a perfectly safe solution but I don't know that it is accepted by UL.

Camlok connectors with set screws seem to generally come with copper foil.

 

[ptonsparky]

Sleeves for fine stranded can be ordered. Brand specific of course,
(They appear to work well in competitors lugs and probably would rank right there with cu foil)

 

[garbo]

Wow! That’s new to me

I installed 1/0 fine stranded wire on 200 amp rated single wire plug in plugs for the six portable 100 KW portable 480 volt loads banks that were supplied with maybe 3/4 to 1" wide copper strips that were wrapped around the fine strands. During yearly generator PM'S we ran Diesel generators with load banks for 3 to 4 hours. Would have to use a FLIR camera on connections every hour and they were never more then maybe 2 to 3 degrees above room temperature.

 

[kwired]

Lugs rated for fine stranded conductors usually have a plate that presses against the conductor. Think the main thing is not to have the screw binding on the fine strands and potentially damaging them, so not knowing what listing standards actually are a sleeve or even copper foil very well might be acceptable for same reasons.

 

[don_resqcapt19]

Many mechanical lugs these days are listed for use with fine stranded wire.

Imo, wrapping the fine strands in heavy copper foil is a perfectly safe solution but I don't know that it is accepted by UL.

Camlok connectors with set screws seem to generally come with copper foil.

There is or was one lug manufacturer that had that in their instructions. Absence a manufacturer's instruction saying you can use the copper foil and finely stranded conductors with a lug listed for Class B and C stranding, I would see that as a violation.

 

[Todd0x1]

Here are some 4/0 Ferrules, and the crimper isn't bad around $100

N1200032 - 4/0 AWG Non Insulated Wire Ferrules, 32mm Pin, UL Recognized, 25 Pieces

NON INSULATED WIRE FERRULES A Wire Ferrule is a connector used to terminate stranded wires (sometimes referred to as a cord end terminal or bootlace ferrule). Traditionally a wire ferrule is crimped to a stranded wire using a crimping tool (compression, ratchet, or pneumatic mechanism), thus...

www.ferrulesdirect.com

 

[LarryFine]

Here are some 4/0 Ferrules, and the crimper isn't bad around $100

I would think the crimper isn't needed for a terminal lug capable of tightening onto the wire.