Consumer unit tails - maximum length

Danny Pross · Jan 21, 2010

Hi
Can anyone confirm what the maximum length is for consumer unit tails?
I wasn't aware that there was any set maximum - but I have heard elsewhere that there is a maximum of 3 metres ???
Is this the case, and can anyone tell me where to read up on it.

Is it actually in the regs somewhere?

Is it a matter of voltage drop???

Thanks in advance

D

acat · Jan 21, 2010

Yes it is 3 mtrs cant think of the reg at the moment but its normally set by the DNO.

Chris

marksparky · Jan 21, 2010

your tails can be longer than 3mts as long as you protect them with a switch fuse at the source can think of reg will post if come ac

ross

Spudnik · Jan 21, 2010

The DNO generally states that its 3M internal or 4 external.

They apparently will provide fault protection on these lengths only

R-fur · Jan 4, 2020

Reg 433.3.1 (iii) Allows the tails to be unfused with the DNO's agreement. The DNO stipulates the max length.
Reg 434.3 (iv) requires additional protection ie trunking or DI tails.

Midwest · Jan 4, 2020

R-fur said:
Reg 433.3.1 (iii) Allows the tails to be unfused with the DNO's agreement. The DNO stipulates the max length.
Reg 434.3 (iv) requires additional protection ie trunking or DI tails.

Holly thread resurrection Batman.

Spoon · Jan 4, 2020

Midwest said:
Holly thread resurrection Batman.

Its only 10 years old mate. Nothing compared to the age of us old fogies.

R-fur · Jan 4, 2020

Sorry didn't see the date, it was in my what's new box. And yes I am an old fogie.

davesparks · Jan 4, 2020

Yes these olds threads keep appearing in the new posts feed, I guess there's a bug in the forum.

westward10 · Jan 4, 2020

Google searches often pop up old threads and people post on them without realising the thread date. This one had a response which showed no content, I deleted but it has showed it as an active thread in the current forum.