Anyone seen this before

[JohnW2]

I think they all have misinterpreted the regulation; the same as Eric frequently does in stating that ring spurs similarly have a maximum length of three metres.

I think that the infamous OSG trumps Eric for 'interesting' made-up regulations. Can anyone see any sense in (let alone regulatory basis for) ....

As a rule of thumb for rings, unfused spur lengths should not exceed 1/ 8 the cable length
from the spur to the furthest point of the ring.
The total number of fused spurs is unlimited but the number of non-fused spurs is not to
exceed the total number of socket-outlets and items of stationary equipment connected
directly in the circuit.

 

[morqthana]

Can the DNO alter physics to get you to install an identical fuse that will protect them?

No, but it's their equipment, so they can say how people may or may not use it. Doesn't matter what you or the authors of the Laws of Physics think.

 

[JohnD]

I think that the infamous OSG trumps Eric for 'interesting' made-up regulations. Can anyone see any sense in (let alone regulatory basis for) ....

The word "should" rather than "must" tells us the author did not think it was a regulation.

 

[EFLImpudence]

No, but it's their equipment, so they can say how people may or may not use it.

How does that work?

Doesn't matter what you or the authors of the Laws of Physics think.

Nonsense.

 

[Taylortwocities]

How does that work

Might be written in the T&Cs of the Supply Contract.

EDIT

I can find a reference to this in a guide from National Grid. https://www.nationalgrid.co.uk/downloads/2686
In this they just “recommend” a maximum length of 2 metres.

 

[EFLImpudence]

Might be written in the T&Cs of the Supply Contract.

No - I mean how do they programme their fuse to ignore the installation faults that they do not want it to cover and for which the customer has to install his own fuse?

I can find a reference to this in a guide from National Grid. https://www.nationalgrid.co.uk/downloads/2686
In this they just “recommend” a maximum length of 2 metres.
View attachment 384795

Care to speculate why?

That does not say another fuse must be added.

 

[JohnW2]

The word "should" rather than "must" tells us the author did not think it was a regulation.

Maybe- but (a) regardless of the precise wording, many people seem to think that anything in the OSG is a requirement AND, more to the point, .... (b) can anyone make any sense of the thinking behind the bits I quoted, even if they were only intended as 'recommendations'??

 

[JohnW2]

I can find a reference to this in a guide from National Grid. https://www.nationalgrid.co.uk/downloads/2686
In this they just “recommend” a maximum length of 2 metres.

True, but that comes from a document which presents a diagram of "the different parts of a domestic electrical installation" which shows nothing downstream of the "Fuse Unit". That might make EICRs very quick and easy

 

[morqthana]

How does that work?

By having something in the Terms & Conditions which you agree to when you become a customer.

Nonsense.

It's not nonsense from the POV of whether they are allowed to have, and "enforce", a rule which says that you can't have meter tails over a certain length without your own fuse.

Their fuse is theirs, the cables from the meter are yours. They don't have to let you use their fuse to protect your cables if they don't want to.

 

[AndyPRK]

Is no one talking about why the MK CU has no MCB ?!

I'm more worried about the SWA than the long tails

 

[pete01]

My meter tails are 4m long and I don't have an additional fuse....why? Why? I hear you all ask.....well because I don't need one

 

[jelliottelectrical]

Is no one talking about why the MK CU has no MCB ?!

I'm more worried about the SWA than the long tails

I did mention it when I posted the pic, it’s obviously a concern and will be replaced next week

 

[jelliottelectrical]

My meter tails are 4m long and I don't have an additional fuse....why? Why? I hear you all ask.....well because I don't need one

Straight to jail, do not pass go, do not collect £200

 

[EFLImpudence]

By having something in the Terms & Conditions which you agree to when you become a customer.

Do you have to sign and promise that only some of your electricity will used their fuse?

It's not nonsense

Of course it is.

from the POV of whether they are allowed to have, and "enforce", a rule which says that you can't have meter tails over a certain length without your own fuse.

But - how does it work and how does their fuse know.?

Their fuse is theirs, the cables from the meter are yours. They don't have to let you use their fuse to protect your cables if they don't want to.

But - how do they prevent it being used?

 

[JohnD]

But - how does it work and how does their fuse know.?

It sometimes knows if someone puts a drill or nail in the cable, which is less likely if it is short and adjacent to the meter and CU