Busbar connections

[chris day]

Hello People

Currently within a carpentry workshop the old main 200a 3 phase isolator needs replacing which currently supplies an equity as old main busbar chamber and in doing so i have to replace some old VIR main tails. (complete birds nest)

I am not sure on the best way to connect my mains tails to the old busbar (35mm wide), i am going to be using TR750 50mm tri rated singles cabling for the supply between the new isolator and busbar, i have attached images of how the old tails are connected and my initial thinking is how can i get a nice connection onto the aluminium busbar?

 

[westward10]

Sweat the old conductors out and reuse them.

 

[chris day]

Sweat the old conductors out and reuse them.

I cant as they are burnt on the other end and appear to be crusty VIR

 

[westward10]

I don't understand the lug seems fine.

 

[James]

Can you drill and tap the bus bar and bolt connect a crimped eye to it?

 

[hasel5]

Be very surprised bid they are aluminium

 

[snowhead]

They'll be Tinned copper.
The "Lugs" for the VIR look like they maybe a well engineered, given it's age, clamp.
It's an angle bracket with the end threads of a bolt showing.
It may be there's a lug on the bottom of the bracket or it may just clamp the bare end of cable.
At worst it would mean unbolting the bracket and bolt a lug on in it's place with the new 50mm Tri in.

 

[westward10]

That is a soldered lug.

 

[snowhead]

On close inspection it is.
With a strand wrapped around the core to thicken it out, just like we used to do.

 

[ipf]

It'd be interesting to know what some of those smaller cables are feeding and how far they are travelling, being on a 200amp supply.
It just looks like a 3 phase pick up point.

 

[chris day]

They'll be Tinned copper.
The "Lugs" for the VIR look like they maybe a well engineered, given it's age, clamp.
It's an angle bracket with the end threads of a bolt showing.
It may be there's a lug on the bottom of the bracket or it may just clamp the bare end of cable.
At worst it would mean unbolting the bracket and bolt a lug on in it's place with the new 50mm Tri in.

thank you for the response, what nut and bolt set up would give the best contact and should i use spring washers or anti slip washers?

 

[chris day]

They'll be Tinned copper.
The "Lugs" for the VIR look like they maybe a well engineered, given it's age, clamp.
It's an angle bracket with the end threads of a bolt showing.
It may be there's a lug on the bottom of the bracket or it may just clamp the bare end of cable.
At worst it would mean unbolting the bracket and bolt a lug on in it's place with the new 50mm Tri in.

thank you for the response, what nut and bolt set up would give the best contact and should i use spring washers or anti slip washers?