Supply to Pub Flat

[bigd]

Asked to upgrade a fuse box, which supplies a domestic dwelling in a Pub.

3-phase supply, and one of the phases supplies the flat on its own meter (The other 2 phases supply the pub)

At the moment the meter tails go to an old switched disconnector and then 6mm T&E supplies the consumer unit in the pub (Oh dear!)

I want to replace all this, but as I normally only do domestic its not something I normally come across.

I need a distribution circuit to the consumer unit/fuse box in the flat and need some advice on the best way to go about it.

My thoughts are meter tails to 63A fuse switch disconnector, SWA to the flat and then the usual consumer unit. The choice of switch disconectors is quite bewildering. I was thinking of the below.

Has anyone got any advice or recommendations?

 

[Guest55]

nothing wrong with it :-/

explain again why the existing sub mains needs to be replaced ??

 

[bigd]

The meter tails go into a unfused switch disconector and then abour 30m of 6mm T&E to the fuse box in the flat.

 

[Octopus]

The meter tails go into a unfused switch disconector and then abour 30m of 6mm T&E to the fuse box in the flat.

Do you mean isolator? Are you sure its not fused?

 

[Guest55]

ok , replace the old switch.
still dont understand why the cable needs to be replaced.

in fact what exactly has the pub landlord called you in to do ?

 

[MDJ]

in fact what exactly has the pub landlord called you in to do ?

"Asked to upgrade a fuse box" I assume that means Distribution Board

 

[Guest55]

"Asked to upgrade a fuse box" I assume that means Distribution Board

and this upgrade was decided upon due to

a. theres nothing on telly
b. its windy outside
c. the landlord wants to spend money he cant really afford
d. he was given a load of duff info.

??

 

[MDJ]

and this upgrade was decided upon due to

a. theres nothing on telly
b. its windy outside
c. the landlord wants to spend money he cant really afford
d. he was given a load of duff info.

??

My money is on D

 

[Specialist]

Should maybe stick to domestic.

 

[bigd]

Should maybe stick to domestic.

The landlord wants the old Bakerlite fuse box, with re-wirable fuses, replaced with a modern consumer unit with RCD protection. he also wants a 40amp final circuit for a shower he's installing in his new bathroom, in addition to the circuits already in the flat.

The existing fuse box is fed by 30m+ of 6mm T&E from the 'isolator' next to the meter in the cellar. The isolator is not fused and very old. The meter tails go directly into the isolator, which is best described as a large metal switch!

No forgive me if I'm missing something but this isn't safe and needs replacing with something more appropriate. As it stands the max current carrying capacity of the 6mm T&E is about 47A but, as this cable is not fused at the isolator, is subject to potential fault currents from the supply.

In addition I don't think 6mm is sufficient for the potential load

Finally I could be wrong but 6mm T&E may be getting to its limits at 30m in terms of voltage drop.

Maybe I should stick to domestic?

 

[MDJ]

The landlord wants the old Bakerlite fuse box, with re-wirable fuses, replaced with a modern consumer unit with RCD protection. he also wants a 40amp final circuit for a shower he's installing in his new bathroom, in addition to the circuits already in the flat.

The existing fuse box is fed by 30m+ of 6mm T&E from the 'isolator' next to the meter in the cellar. The isolator is not fused and very old. The meter tails go directly into the isolator, which is best described as a large metal switch!

No forgive me if I'm missing something but this isn't safe and needs replacing with something more appropriate. As it stands the max current carrying capacity of the 6mm T&E is about 47A but, as this cable is not fused at the isolator, is subject to potential fault currents from the supply.

In addition I don't think 6mm is sufficient for the potential load

Finally I could be wrong but 6mm T&E may be getting to its limits at 30m in terms of voltage drop.

Maybe I should stick to domestic?

No maybe you should give the information in the opening post, you would have been given plenty of help, we are not psychics

 

[bigd]

Sorry boys. Should have been more detailed.

Effectively I have a single phase supply in the cellar and a fuse box 30m away in the flat.

Now as a domestic installer this wouldn't normally cause me a problem as the consumer unit would be next to the meter in a house and I would just route the meter tails into the consumer unit.

Maybe I am getting a bit out of my depth, but I didn't think it would too far from my abilities to install a distribution circuit from the meter to the flat which would be a lot safer than the existing 6mm T&E.

There's no 3 phase distribution board in the pub. Just a hotch potch of fuse boxes and consumer units on each of the phases of the supply. Each supplying different areas of the pub.

 

[atm84]

You seem to have it all wrapped up. You haven't done anything wrong. Crack on I say.

 

[Octopus]

The landlord wants the old Bakerlite fuse box, with re-wirable fuses, replaced with a modern consumer unit with RCD protection. he also wants a 40amp final circuit for a shower he's installing in his new bathroom, in addition to the circuits already in the flat.

The existing fuse box is fed by 30m+ of 6mm T&E from the 'isolator' next to the meter in the cellar. The isolator is not fused and very old. The meter tails go directly into the isolator, which is best described as a large metal switch!

No forgive me if I'm missing something but this isn't safe and needs replacing with something more appropriate. As it stands the max current carrying capacity of the 6mm T&E is about 47A but, as this cable is not fused at the isolator, is subject to potential fault currents from the supply.

In addition I don't think 6mm is sufficient for the potential load

Finally I could be wrong but 6mm T&E may be getting to its limits at 30m in terms of voltage drop.

Maybe I should stick to domestic?

Some of which do have cartridge fuses inside!

 

[ipf]

Sorry boys. Should have been more detailed.

Effectively I have a single phase supply in the cellar and a fuse box 30m away in the flat.

Now as a domestic installer this wouldn't normally cause me a problem as the consumer unit would be next to the meter in a house and I would just route the meter tails into the consumer unit.

Maybe I am getting a bit out of my depth, but I didn't think it would too far from my abilities to install a distribution circuit from the meter to the flat which would be a lot safer than the existing 6mm T&E.

There's no 3 phase distribution board in the pub. Just a hotch potch of fuse boxes and consumer units on each of the phases of the supply. Each supplying different areas of the pub.[/QUOTE]

Pretty much the norm for the vast majority of pubs that I've come across.

And they tend to be a general pain in the butt to work on/in.

 

[GLENNSPARK]

My money is on D

nonsense...everyone knows its option A...

 

[telectrix]

what extraneous metalpipework is in the flat? where's it bonded to? what's the earthing system? that'll give you an idea of what you need to replace the 6mm T/E.

 

[GLENNSPARK]

Some of which do have cartridge fuses inside!

some of which also have BS3036s inside...