External Power

[AP1984]

Hi,

New to the forum but fairly competent DIY enthusiast.

I have recently moved into a house which already has an external circuit in the basement (protected by a circuit breaker, max load 40a) powering 4 external double sockets, this is run off the main RCD protected circuit board for the house.

I also have a currently unpowered detached garage about 30m from my house which I'd like to run power too, just a simple tube light and a couple of sockets for a small heater and general power tool usage, possibly some basic gym equipment in future. I am also about to start building a pond so would like another double socket in the garden about 15m from the house to run a UV pond filter and pump.

So, my question is - can I simply run an external fused spur off one of the existing sockets that can power both the pond requirements and then a spur from that socket running to the garage? Do I need another fused switch after the socket in the garage to run to the light switch?

Planning to do all outdoor power runs in SWA clipped to fence.

Is the above acceptable, or could you give me a better way of doing things?

Thanks, in advance!

 

[Deleted member 105166]

They are all on one ring circuit but sorry, it's actually 2.5 - twin and earth. MCB protecting it is 40amp

For a ring final circuit in 2.5mm T/E, a 32A protective device should be fitted.

 

[Spoon]

They are all on one ring circuit but sorry, it's actually 2.5 - twin and earth. MCB protecting it is 40amp

As above mate. Hope you don't have a ring main using 2.5mm protected by a 40A breaker..

 

[MJPD29]

The basement has it's own circuit panel - the max load stated on the labelling in 40a. That's via SWA from the main house board (as it runs out of the house, around the building and back down into the basement). This feeds 4 external double sockets via 1.5mm cable.

I get what you mean now. Presumably it is 2.5 to the sockets. Double check this to be sure

 

[Kidsolo]

This feeds 4 external double sockets via 1.5mm cable.

What is this black magic that you speak of? 2.5 mm protected by a 40 amp breaker? the cable will melt before the breaker trips.
If the basement supply cable is large enough, make a mini sub board where it enters the basement and have a circuit for basement outlets and one for the garage. Run a cable to the garage. To get away with a lower cable rating and breaker size, you make it all a power circuit in the garage by putting your light fitting on a lead and plug and situate it so it plugs into a power point instead of it's own switch (you just switch it via the power point). To take it a step further you can add a breaker or isolating switch where it enters the garage.
It all relies on the size of the cable that is feeding the basement.

 

[DPG]

What is this black magic that you speak of? 2.5 mm protected by a 40 amp breaker? the cable will melt before the breaker trips.
If the basement supply cable is large enough, make a mini sub board where it enters the basement and have a circuit for basement outlets and one for the garage. Run a cable to the garage. To get away with a lower cable rating and breaker size, you make it all a power circuit in the garage by putting your light fitting on a lead and plug and situate it so it plugs into a power point instead of it's own switch (you just switch it via the power point). To take it a step further you can add a breaker or isolating switch where it enters the garage.
It all relies on the size of the cable that is feeding the basement.

An FCU feeding the light would be better than it being on a 13A plug.

 

[Deleted account]

edit: duplicate post
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You may want to think again on the size of the cable for a 30M run. dependant on load that could be quite a volt drop. And total disconnection times ( loop impedance) will need checking to ensure the overcurrent device will disconnect in the required times in the event of a fault.