Domestic Supply ?

[Abruno]

Hi all, Any ideas why there are 4 x 60 amp fuses on the DNO'S supply intake in a domestic house? Any one came across this set up? Its a TN-S Supply. Picture below cheers.

View attachment 35188

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[Pete999]

Maybe the N is a solid link

 

[Abruno]

Neutral has its own separate Terminal to the right of the four fuses?

 

[westward10]

The cable doesn't look big enough to be three phase, could have originally supplied four single phase, or that's all they had on the van 50 odd years ago.

 

[7029 dave]

IMO that could be 3 phase, but hey only 1phase tapped off, why do you ask.?

 

[sparksburnout]

It is a bit odd. I have a 3P supply into my place, cable looks identical to be honest. Would the DNO supply 4 SP supplies with the common neutral block? Dunno, I would give them a ring, they are really good round here (WPD), I have the local teams number and they are only too happy to come out and have a look. They might even make you a nice bacon butty in their custom built kitchen/van. They have a nasty habit of leaving seals lying about as well.....

 

[gutterball]

Quite common around here. loop feed 1 supply to 4 adjoining houses. our old house was a semi with the loop to next door on our service head.

 

[Lucien Nunes]

Cable could easily be 4c and yes looks like a relic of looped services. Probably too old to have been put in for electric wet CH, although if someone did request a TP+N supply for some reason (I've seen it in a house that was used for some kind of war work) the pup fuse might have been a looped service or to take the existing SP+N supply on a separate meter. Not ideal that the present supply is off the pup, IIRC UKPN limits them to 60A although that tends to assume there's also a service running on the parent. New S7 pups are limited to 30A max partnered with 60A.

 

[polo1]

"Pup fuse" - can you explain L? Haven't heard the expression before. Cheers.

 

[gutterball]

 

[sparksburnout]

"Pup fuse" - can you explain L? Haven't heard the expression before. Cheers.

Yes I am a bit confused as well Lucian, how it it looped if the fuses are not terminated? Or are they just using the I/C side of them to daisy chain the next one?

 

[westward10]

I assume the "pup" fuse is the left one as it seems to be an add on.

 

[7029 dave]

I assume the "pup" fuse is the left one as it seems to be an add on.

Yes, that's how I see it and have seen it, the DNO just leap off the phase to add one more.And it's always L1

 

[gutterball]

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[Lucien Nunes]

A pup is an additional fuse mounted next to the main one, fed from the second terminal on the incoming side via a U-link. The service cable termination in the main fuse has to carry the current for both.