is my wiring plan to the sheds ok?

Question

for this the consumer unit is to far away and awkward to run from so i was going to run a spur from a socket using 2.5 twin and earth via an rcd and a fused switch unit then the 2.5 will run through plastic pipe underground to the front shed approx 14m away. then a junction box to an exterior shed light and inside the shed another fused switch unit to a single socket, light switch and light. the rear shed elecs will run from a 30 amp mcb in the consumer unit then using the same plan as above, then in addition another two exterior lights will be directly linked together using 1.5 mm twin and earth approx 6m from the 1st to the 2nd then 10m from the 2nd to the 3rd. will both of these set ups be ok..

yeh hi, this is a u.k question.

Answer 1

The basic idea is right.

If you are using plastic pipe this should be run above ground - about 300mm - screwed to a fence or something.

Underground you should use Steel wire armoured cable with the correct glands onto metal boxes.

Using a spur via an RCD form the house is fine so long as you also use a double pole isolator. you would be better running 4 mm cable from the house to the shed though.

remember though, sheds are outside wiring and not in the exemption list of the new part P regulations. So you will need to follow part p guidelines and its associated risk assessments & council notifications.

Answer 2

Wiring to a shed or detached garage etc.. needs to be installed or inspected by a qualified Part P electrician. You will find that the wire colours will be new so if there's a problem in the future, your insurance company will know to ask for the certificate.

The wire to the shed needs to be armored, fuse box and correct rating to sockets, lights etc,, fitted with correct wire.

Have you considered a college course? Or get an electrician.

Answer 3

Seems mostly reasonable to me peter d. Although I don't understand why it's difficult to get to the front shed from the consumer unit, but ok to get to the rear one, (that's how I've read it anyway) Also the supply should be splitting when it reaches the shed. The fused switched unit mentioned there could be used to reduce the fuse rating for lighting down to 5amp so that the socket remains fused at 13amp (in fused switched connect unit at spur) The rear shed you say will be supplied from consumer unit, 30 amp mcb. If single length of 2.5 is used I would suggest a 16 or 20 amp mcb not 30 amp.

Answer 4

What you are proposing will leave you with no way to independently isolate the shed from the mains which is very bad practice.

Whilst you can still do whatever you want - it is worth considering that you should still observe good practice. Whilst you are introducing MCN to act as isolation points - these are not considered as true isolation points - they are failure protection devices.

In order to disconnect the shed you would have to disconnect the socket ring main. This is not independent isolation.

Do the job properly and you will be happier with it in the long run - so will the Fire Brigade when you don't over load the ring main.

Answer 5

NO! As soon as you leave your house the cable needs to be mechanically protected! What happens if someone puts a spade thru it?! -Plastic conduit goes brittle when exposed to the elements
You need to run a 6mm SWA (Steel wire armour) from your fuse board to the shed with CW glands and mount a seperate fuse board in the shed with its own seperate earthing via an earth stake.

Answer 6

The simple answer is NO NO NO.
This is not a job for a DIYer.
Get an electrician in, there are more issues here than meets the eye and need to be addressed before work can commence.

It will be cheaper and safer for you in the long run.

Answer 7

most people are right . you are breaking the law if you do this as you have to be part p registered to carry out any electrical work outside, this also includes , kitchens , bathrooms and any new circuits.get an electrician

Answer 8

12,000 Shed Plans & Designs : http://www.GuideInfos.com/Guidance

Answer 9

your best bet is to get a qualified electrician,because under the new guidelines any work carried out by yourself will not be insured.so any damage to your property or to persons will be your personal liability

Answer 10

Please identify your country; state or province, etc. Regulations differ from province to province, state to state, and definitely country to country.

Sound like you are from the UK but not sure.