New Build. Consumer Unit 7 mtrs from Supply Box Installation Advice Required

[GHDirect]

Hi all
I am retired but needed a project so self building our new bungalow on an existing plot with power.
I have Part P but limited experience on a totally new supply installation.

The main supply and meters will be into my new white box on outside wall at 100amp and this has been agreed with Western Power.

My consumer unit is approx 7 mtr away in a cupboard within the new build.

The property design has a concrete block & beam floor which once laid is not accessible so I need to ensure I install any channel or duct prior to thread cable through later in build.


Earth will be a new spike and I will install this near the box to take a 16mm earth cable into the build.

I'll need an 80amp fuse within supply box for my feed.

I need to install a duct or conduit under the floor to thread supply cable.

1/ Should this be plastic or metal?

2/ Should I use SWA or just shielded cable within the duct or conduit?

3/ What size cable for 100/80 amp supply is recommended?



Regards

 

[Knobhead]

I have Part P but limited experience on a totally new supply installation.

Welcome to the site GHD...and take the grumpy git's comments above with a pinch of salt!

Festive greetings.

Why, the guy isn’t an electrician and so should employ someone who is.

Festive greetings, Bah Humbug!

 

[Knobhead]

night nurse???

View attachment 27293

Oi! You keep away from my Pink Minx, I need her.

 

[polo1]

night nurse???

View attachment 27293

Jeez, what a rip off. Boots only gave me a brown bottle with a green liquid in it.

 

[trev]

That night nurse is a lot more expensive mate. She could cost you as much as your wife, your kids and your home.

 

[Knobhead]

That night nurse is a lot more expensive mate. She could cost you as much as your wife, your kids and your home.

I know, but it’s fun all the same.

 

[Octopus]

"I have Part P"

WTF.

Are you registered? do you have upto date regs books etc? calibrated tester?

 

[not clever]

Do it anyway you like, with 3rd party sign off on it's way (according to my Nicey assessor) somebody will check & sign it off.

 

[ferg]

Ask the DNO what they want.

Then provide it.

If the site already has power where is it in relation to the new build?

 

[uksparks]

I don't believe that no PME is available, sounds a bit odd to me. Whenever I speak to WPD they always tell me that everything is PME now.

 

[trev]

I don't believe that no PME is available, sounds a bit odd to me. Whenever I speak to WPD they always tell me that everything is PME now.

There's no PME available round our way mate so it does happen. However, given the info I'd be surprised if the OP really has much of a clue

 

[davesparks]

If it was my own house I was building I would be installing earth electrodes too even if it was a PME supply.
To my mind it is a perfectly sensible idea, and if I'm footing the bill then why not?

Plus there are many areas without PME available, plenty of areas around here don't have it available

 

[pennychew]

That night nurse is a lot more expensive mate. She could cost you as much as your wife, your kids and your home.

Sounds like a canny swap to be honest!

 

[atm84]

If the tails are over 3 mtrs which in this case it is then you will need to install a switch fuse unit at the intake which will protect the cable to your CU. Now this is a DNO requirement and not a BS 7671 regulation contrary to what some ppl may tell you. Some DNOs stipulate that tails over 2 mtrs require a switch fuse.

 

[Octopus]

If the tails are over 3 mtrs which in this case it is then you will need to install a switch fuse unit at the intake which will protect the cable to your CU. Now this is a DNO requirement and not a BS 7671 regulation contrary to what some ppl may tell you. Some DNOs stipulate that tails over 2 mtrs require a switch fuse.

And EDF don't allow them at all meaning the CU must be within 3m of the main fuse

 

[SPARTYKUS]

That night nurse is a lot more expensive mate. She could cost you as much as your wife, your kids and your home.

a few seconds of ecstasy for......