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so how much is it going to set me back to get a sub main installed in the garage with 1 32 ring and a lighting radial? roughly speaking. Assume the swa channel is already chased.
 
so how much is it going to set me back to get a sub main installed in the garage with 1 32 ring and a lighting radial? roughly speaking. Assume the swa channel is already chased.
Get an Electrician in ti give you a quote, simples.
 
A little harsh davesparks the OP is only asking. OP, the only real way in any case, to get this work done is by a qualified competent electrician, its a bit more than putting up some lights you've got from B&Q. Think Pete suggestion is the way to go.

PS your electrician might suggest you doing some labour work, like trench/chasing for your supply cable, which may save you some pounds.
 
what's the point of ------footing around. davesparks is right. nobody can give a more accurate estimate without physically seeing the job and pricing up equipment and estimating a timescale.
 
what's the point of ------footing around. davesparks is right. nobody can give a more accurate estimate without physically seeing the job and pricing up equipment and estimating a timescale.

It was actually quite mild reply from davesparks, but I kinda sensed the next few wouldn't be. Anyway, whichever your viewpoint the OP seems to have taken on-board the advice :)
 
HI
I am aiming to install a garage CU that extends a circuit between the main CU to a new garage CU. The new garage CU will be used on three circuits
a) I have run 50m of 6mm 3 core SWA between the garage and shed A. This is to feed a couple of sheds that will both have lights and sockets. I am to install a garage CU with 30mA RCD in each shed to run the light cicrcuit and sockets. Shed A will also serve a 32a circuit for shed B
b) seperate 2.5mm SWA on 6a circuit to run 6/7 LED lights in the garden. Will run off the new garage CU
c) seperate 2.5mm SWA on 20a circuit to run a water feathure in the garden

Now my question is it ok to have
Main CU connected to garage CU with 6mm SWA cable (this Tenby unit has dual RCD and non RCD). The new garage CU will have RCD protection
a new garage CU is installed in shed A and also has RCD protection
finally another garage CU Is installed in shed B that also has RCD protection

All because I cannot find an adequate garage CU that does not have RCD protection
 
Thank you for your prompt responses.


Can I ask what sort of ducting would be ideal to run the SWA in and why I need the ducting if its SWA?


Do I need RCD protection if I am less than 50mm but in SWA?


In terms of zoning I am struggling to find info as most diagrams show wall and ceiling wiring zones. I am simply going through the hall and lounge floor to the outside.


My house is a new ish one using TN-C-S earthing


Regards,
Dont forget if you are running 16mm T and E the earth will be too small. 10mm earth required.
 
Dont forget if you are running 16mm T and E the earth will be too small. 10mm earth required.
That's only if there's a requirement to bond services back to the MET, if there's no bonding requirement then the earth is sized accordingly depending upon the result of the adiabatic equation.
 
HI
I am aiming to install a garage CU that extends a circuit between the main CU to a new garage CU. The new garage CU will be used on three circuits
a) I have run 50m of 6mm 3 core SWA between the garage and shed A. This is to feed a couple of sheds that will both have lights and sockets. I am to install a garage CU with 30mA RCD in each shed to run the light cicrcuit and sockets. Shed A will also serve a 32a circuit for shed B
b) seperate 2.5mm SWA on 6a circuit to run 6/7 LED lights in the garden. Will run off the new garage CU
c) seperate 2.5mm SWA on 20a circuit to run a water feathure in the garden

Now my question is it ok to have
Main CU connected to garage CU with 6mm SWA cable (this Tenby unit has dual RCD and non RCD). The new garage CU will have RCD protection
a new garage CU is installed in shed A and also has RCD protection
finally another garage CU Is installed in shed B that also has RCD protection

All because I cannot find an adequate garage CU that does not have RCD protection
In bold, depending upon your intended load for the garage and sheds 6mm SWA on a 50m run is not suitable for voltage drop requirements. Depending upon the loads and distances for the next two sheds you'd be looking at either 10 or 16mm to supply the garage.

Also depending upon load and distance you could possibly use 1.5mm SWA for the lights and water feature.

All of the above is also reliant upon installation method, i.e. buried/clipped to a wall etc.

I would urge you to consult a local electrician to have this designed correctly and depending upon your location there's also Part P notification to be considered.
 

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