25mm Tails in Trunking

[Specialist]

Hi all: Not got Regs book here & can't for the life of me remember the max length of Run for 25mm tails installed in trunking to feed a CU.

 

[spark 68]

If it is from the service head, then max 3M

 

[topquark]

If you need longer than 3M from the service head, install a switch fuse. The limit is the DNO suggesting that their fuse will only protect up to 3M.

 

[micknew]

Pretty sure its not in the IEE regs, its a supply authority regulation.

 

[Specialist]

Cheers guys: The old age is getting to me lol, damned if I could remember. It was a question I was asked by someone who wanted to do a 15m run of tails from the Head to a CU.
Appreciate the answers.

 

[ackbarthestar]

Pretty sure its not in the IEE regs, its a supply authority regulation.

Try 433.2 and 434.2. In both cases 3m is given as the maximum allowable length downstream of the service fuse. However some DNOs specify 2m as a maximum length.

 

[Specialist]

Cheers ackbar.

 

[cakey]

Is it a requirement to run tails in trunking then? Or just a preference?

 

[topquark]

Is it a requirement to run tails in trunking then? Or just a preference?

Just a preference, they're double insulated. It's just giving a bit more support to them.

 

[netblindpaul]

top,
they are not "actually" double insulated.
They are technically insulated & sheathed.
The "grey" covering on T&E & tails is not classed by the cable standards, nor the cable makers as insulation!

 

[topquark]

top,
they are not "actually" double insulated.
They are technically insulated & sheathed.
The "grey" covering on T&E & tails is not classed by the cable standards, nor the cable makers as insulation!

You are of course correct. I stand corrected Sir.

 

[cakey]

Have had Dno before refusing to fit new meter until the 1m tails (insulated and sheathed) were all boxed in. Told him it was nonsense... Maybe he had a point.

 

[D Skelton]

top,
they are not "actually" double insulated.
They are technically insulated & sheathed.
The "grey" covering on T&E & tails is not classed by the cable standards, nor the cable makers as insulation!

Proper ----!!! I think you and I could become very good friends

 

[telectrix]

top,
they are not "actually" double insulated.
They are technically insulated & sheathed.
The "grey" covering on T&E & tails is not classed by the cable standards, nor the cable makers as insulation!

buy the same argument, T/E is not double insulated either. it is also insulated and sheathed.

 

[D Skelton]

Exactly