Garage power (high load)

[Kyran]

Hi All


Any other thoughts, ideas/whys of legally doing it. I have client that wants to rewire his large/double garage as he wants to put his kilm and potters wheel in it plus run whats there and power for a new electric garage door (13a plugged one). currently theres lights, fridge/freezer power down to green house running heater.


So he want to power
kilm 3kw
potters wheel 400w
minimim heater 1 kw for him self
fridge/freezer
lights
garage door
green house heater.


He currently has a 2.5 t&E fuse down off his living room ring.


What i have quote to run a 6mm from a new supply (split tails) due to old board that is currently there. Garage CU in the garage that would run 6 10w led floods, 6 sockets around different parts of the garage, three circuits. intergreat the green house power in to new board. all cabling in conduct. The garage is 7m by 5.3m wide the 6mm armoured is about 20m long.


He does not want to pay to do and want to to requite to take the power off the ring, which i have said its to much and he would end up running out of power as the kiln takes to 3kw and even if you just have the kiln and fridge it will blow.


Any other ideas.

 

[sparksburnout]

It's quite correct what you believe as reflected in 537.1.4
A main linked switch or linked circuit breaker shall be provided as near as practicable to the origin of every installation as a means of switching the supply on load and as a means of isolation.

Just because the guidance gives permission to define an installation as any assembly of circuits, and that multiple installations may exist within a dwelling or building thus mangling regulation 537.1.4 into meaninglessness does not mean it's the best course of action to take.

Always best to have a single main isolator in my book too Tel. If it's a single DB then the main switch is fine. If it's Henley blocks with multiple DBs then I'd like an isolator before the split tails.

I can see the benefit of a single point of isolation, but it is useless unless it is VERY clearly labelled as such so that it can be easily identified in an emergency. The average user will naturally go for a fusebox/CU otherwise.

 

[UKMeterman]

I have a contactor supplied by the metering supplier that switches my E7 load, how can I have a "single point of isolation" when the henleys have been sealed by the energy supplier? The installation is designed to have "two supplies"

 

[davesparks]

I have a contactor supplied by the metering supplier that switches my E7 load, how can I have a "single point of isolation" when the henleys have been sealed by the energy supplier? The installation is designed to have "two supplies"

By installing a four pole main-switch

 

[sparksburnout]

I have a contactor supplied by the metering supplier that switches my E7 load, how can I have a "single point of isolation" when the henleys have been sealed by the energy supplier? The installation is designed to have "two supplies"

Does it matter if the henleys have been sealed by the supplier? Why should they seal a henley block it's downstream of the meter and nowt to do with them.

 

[telectrix]

Does it matter if the henleys have been sealed by the supplier? Why should they seal a henley block it's downstream of the meter and nowt to do with them.

snip...

 

[sparksburnout]

snip...

Or just wait for the fairies