Running Cables to the Garage

[walec]

Hello All,

Been asked to replace power to a garage, there is exising power but it is exposed 10mm T&E and has been there years, it is clipped to a length of tube 2.5M overhead over a short distance of 1.5M
My problem is how to replace it.
The CU being on the same side of the bungalow as the garage, is RCD protected and has spare ways but I think it may be better to fit a seperate 40A main switch having split the tails and use 10mm SWA, (supplying 6 double sockets and lights) problem is, the bungalow floor, the path (1.5M) and the garage floor are all concrete and thick stuff as well.
The path will have to come up but I would like ideas on how to from inside the house to inside the garage. Overhead is not really an option as I think it has to be above 3M and the bungalow is not that tall and that cancels out the existing route..
The garage also has water and gas so I will have to put a TT system in as well when connecting in the garage (house is PME), there is currently no earthing in the garage. I will put an RCD board in the garage.
Thanks

 

[james king]

Hello All,

Been asked to replace power to a garage, there is exising power but it is exposed 10mm T&E and has been there years, it is clipped to a length of tube 2.5M overhead over a short distance of 1.5M
My problem is how to replace it.
The CU being on the same side of the bungalow as the garage, is RCD protected and has spare ways but I think it may be better to fit a seperate 40A main switch having split the tails and use 10mm SWA, (supplying 6 double sockets and lights) problem is, the bungalow floor, the path (1.5M) and the garage floor are all concrete and thick stuff as well.
The path will have to come up but I would like ideas on how to from inside the house to inside the garage. Overhead is not really an option as I think it has to be above 3M and the bungalow is not that tall and that cancels out the existing route..
The garage also has water and gas so I will have to put a TT system in as well when connecting in the garage (house is PME), there is currently no earthing in the garage. I will put an RCD board in the garage.
Thanks

surly if u take a new feed from the house in swa u can pick up a earth from there as long as u go back into the board. using the outer sheeth or one of the cores as earth

 

[Des 56]

A 3 and half meter highth doesn't usually become a problem
It should be lower than the bungalow I would have thought

If there are hight restrictions,can you mount an angle iron or such to increase that highth
The pathway route,I cut a groove in the concrete and plate it over flush

The garage does not have to be TTd
You can run a main bonding conductor for the services in the garage along with the swa

Splitting the tails for independant supply to the garage would be my option also

 

[walec]

Thanks guys, I will earth the SWA at the MET end but I was sure that if there is a seperate water supply then a seperate earth is required i.e.TT.
Anyway if I go for the overhead (height 2.3M) then it makes the cable 20M long and I think a TT would be the best option.