Shed Electrics

[Rob72]

Hi all. I had a sparky in to look at my shed for electrics he said get a wylux 40amp mcb for spare space in house CU this CU has a main switch Rcd. Run 6mm T+E from there to shed in heavy duty conduit (along fence) armoured out of price range I'm afraid. In shed I have CU 100 amp Rcd with separate mcb for lights and sockets. Will have 3 double sockets 2 lights and spur off socket for outside flood light would this be right. Shed about 30m from house

 

[Essex1]

What is the question?

 

[apprentice87]

Armoured would have been cheaper.......

john..

 

[ProDave]

Yes what's the question?

If the house CU only has one rcd for everything that's not ideal. You would then have two rcd's covering the shed and if you do anything dodgy in the shed you could trip the whole house. So there are better ways of doing it.

 

[Essex1]

100mA S type RCD will sort it. Haha

 

[Doc Hudson]

A lot of this will depend upon what actual load you are having in the shed. Its sounds a bit overkill to me for 3 sockets and 2 lights. But then the design spec will need to be acceptable to whoever is testing certifying and notifying the new circuit to LABC.

Doc H.

 

[Essex1]

I suspect a porkie is being told. No electrician would recommend conduit and T&E over SWA due to cost and if you get an electrician in to advise you and quote you but you trust him so little that you need to check with a bunch of strangers on-line then something is not right. You are doing this yourself aren't you?

 

[Doc Hudson]

I thought you were a dab hand at threading 30m of 6.0mm down a conduit?

Doc H.

 

[NozSpark]

I once put about 30m of 16mm earth down some 20mm copex... :shakehead

 

[binky]

just shoved 60m of 10mm 3 core swa down 50m of 25mm copex - fortunately it was down a steep hill from a small castle

I suspect a porkie is being told. No electrician would recommend conduit and T&E over SWA due to cost and if you get an electrician in to advise you and quote you but you trust him so little that you need to check with a bunch of strangers on-line then something is not right. You are doing this yourself aren't you?

 labour is probably dearer than swa. Heavy duty conduit - what for? expecting vandals?? Conduit, white maybe for decoration, but beyond that swa everytime.

 

[HandySparks]

just shoved 60m of 10mm 3 core swa down 50m of 25mm copex...

Why would you need to put swa inside copex? Just curious.

 

[Andy™]

Hi all. I had a sparky in to look at my shed for electrics he said get a wylux 40amp mcb for spare space in house CU this CU has a main switch Rcd. Run 6mm T+E from there to shed in heavy duty conduit (along fence) armoured out of price range I'm afraid. In shed I have CU 100 amp Rcd with separate mcb for lights and sockets. Will have 3 double sockets 2 lights and spur off socket for outside flood light would this be right. Shed about 30m from house

6mm T&E in 30mtr of conduit... this could be interesting...

not looked at the cable prices, but SWA instead of T&E would cost about an extra £30. but then you wouldnt need conduit so would save a bit there so overall it wouldnt cost much extra for the cable designed for the job instead of bodging the wrong cable into some conduit...

 

[Murdoch]

Hi all. I had a sparky in to look at my shed for electrics he said get a wylux 40amp mcb for spare space in house CU this CU has a main switch Rcd. Run 6mm T+E from there to shed in heavy duty conduit (along fence) armoured out of price range I'm afraid. In shed I have CU 100 amp Rcd with separate mcb for lights and sockets. Will have 3 double sockets 2 lights and spur off socket for outside flood light would this be right. Shed about 30m from house

Hum..... are you really sure about this?

 

[Blue Duck]

Not to say its wrong as of course there is nothing wrong with it but will be a right PITA and you will spend more time on it! :lol:

 

[Rob72]

One thing the sparky did say that I forgot to mention that the sparky told me. As house CU is at front of house. He said I could have 6mm T+E from there through house to the back and have it put into a separate fused cooker switch and then from there up to the shed CU therefore I could use 6mm swa from shed to back of house then the 6mm t+e through house. Does that make sense would not be able to run swa from shed direct to house CU as layout is wrong for this

 

[Andy™]

if you can get 6mm T&E through the house, then SWA isnt much harder. and no need for a 'cooker switch' either

i think you need to find a better sparky

 

[Doc Hudson]

Good practice in these sorts of situations is to get three independent quotes from different electricians. There is always more than one way to achieve the required final result. (maybe your first 'spark' has a bit of a DIY mentality and doesn't like working with armoured, thinking Twin & Earth is easier). As a general rule the number of joints in any circuit should be kept to a minimum. As a joint in any cable is a weak spot where future problems could arise if not correctly terminated. Without seeing the actual physical arrangement it is difficult to recommend the best solution. Get a second and third opinion and see what other solutions & costs are suggested. 

Doc H

 

[Rob72]

Any sparkys in Norwich willing to come and give me a second quote

 

[Rob72]

I think he suggested 40amp fused cooker switch incase something happens to cable from house to shed then it wouldn't trip house it stops at switch but I'm not a sparky so I don't know think I need someone to come and have a look

 

[Lurch]

It's difficult to definitively state what should be done but your existing electrician sounds somewhat inexperienced and seems to be randomly guessing at what should be done and what goes where. It does not sound like he is the man for the job.