16mm Tails feeding next door?

[SMG]

Hi, I have just had a new consumer unit fitted, RCBO`s & surge protected, new 25mm tails, & also a separate isolation switch 100A. My incoming service head has 2 fuses & 2 outlets, 1 for my home & 1 for next door. (Semi Detached). A few years ago, the electric board fitted 2 100A fuses into the head. The electrician explained the layout to me, & expressed concerns about the size & age of next doors cable, probably fitted in 1935 when the houses were built.

Next doors cables run from my service head, about 30 foot from my electric cupboard, through metal pipe, & under my floorboards (Fixed to the Joyce). My concern is that their cable is very old & only about 16mm. The new home owners have put a double extension on their home, & plan to use all electric for their heating, they also have an electric car. I`m very concerned that the cable is not powerful enough to meet their needs, my son recently had a fire at his service head, the power went off & the head had to be replaced. Can anyone advise me please.

 

[Old Salt]

Ask the DNO for advice

 

[Guitarguy]

It is a standard looped supply that feeds you and next door, their supply will be a maximum of 60a. If they want to have a car charger fitted then the installer will most likely insist on them having their own dedicated 100a supply and won’t fit the charger.
If they get a charger fitted and run all electric heating on it as it is then the 60a fuse will blow in no time.

I’d get the DNO to safety check it for peace of mind

 

[333rocky333]

100A stamped on the Fuse holder just means the maximum, it may indeed have a lower rated fuse inside, possibly 60A as the post above suggests.
It is NOT advisable to pull it out to check, sometimes there is an extra sticker on it with the actual fuse size that is fitted.

 

[SMG]

Thank you guy`s, the fuses are 100A, I remember the electric company fitting them & putting a new label on. I will contact the DNO & see what they say.

 

[Simon35]

Hi, I have just had a new consumer unit fitted, RCBO`s & surge protected, new 25mm tails, & also a separate isolation switch 100A. My incoming service head has 2 fuses & 2 outlets, 1 for my home & 1 for next door. (Semi Detached). A few years ago, the electric board fitted 2 100A fuses into the head. The electrician explained the layout to me, & expressed concerns about the size & age of next doors cable, probably fitted in 1935 when the houses were built.

Next doors cables run from my service head, about 30 foot from my electric cupboard, through metal pipe, & under my floorboards (Fixed to the Joyce). My concern is that their cable is very old & only about 16mm. The new home owners have put a double extension on their home, & plan to use all electric for their heating, they also have an electric car. I`m very concerned that the cable is not powerful enough to meet their needs, my son recently had a fire at his service head, the power went off & the head had to be replaced. Can anyone advise me please.

Poor woman, not much of a life.

 

[ericmark]

I would rescue Joyce from under the floor boards, and call the DNO, as @Guitarguy says looped supplies should not be used for EV charging, however there is nothing to stop an EV car owner fitting a 32 amp socket and using a portable charging lead seems there is a loop hole in the regulations, only the fixed charge point needs the DNO to be told.

16 mm PVC i.e. thermal plastic as you say is not really good enough when not cooled by direct contact with the ground. The DNO guy should have never fitted a 100 amp fuse. This house as many others has a 60 amp fuse, in the main as the fuse box when it was fitted had an isolator only rated at 60 amp. The old Wylex fuse box was only 60 amp, so the DNO guy should have gone next door to check the distribution unit fitted could take 100 amp.

 

[SMG]

Ericmark, The cables are the old "Woven cover

type", Picture enclosed.



Sorry guys, Joist, not Joyce..

 

[flameport]

Those cables are life expired and should have been replaced several decades ago.
Your neighbours need their own separate supply direct into their property.

 

[Harry Bloomfield]

Ericmark, The cables are the old "Woven cover

Called VIR - Vulcanized India Rubber..

 

[333rocky333]

Called VIR - Vulcanized India Rubber..

I think the proper name though was VRI, Vulcanised Rubber Insulated

 

[Harry Bloomfield]

I think the proper name though was VRI, Vulcanised Rubber Insulated

It was known as both, called either.

 

[SUNRAY]

Called VIR - Vulcanized India Rubber..

That's the only term I'd heard of until I came on this forum.

I think the proper name though was VRI, Vulcanised Rubber Insulated

I've heard of Vulcanized India Rubber tyres but never Vulcanised Rubber Insulated tyres... if it helps at all.

 

[JohnW2]

I've heard of Vulcanized India Rubber tyres but never Vulcanised Rubber Insulated tyres... if it helps at all.

I believe that the stuff used for tyres usually has carbon in it to make it a bit conductive. If that's true, it would not be very good at rendering anything "Insulated"

Kind Regards, John

 

[SUNRAY]

I believe that the stuff used for tyres usually has carbon in it to make it a bit conductive. If that's true, it would not be very good at rendering anything "Insulated"

Kind Regards, John

That may be very true but still known as VIR.