DIY Forum

 

Ultimate HandymanUltimate Handyman on Pinterest

 

DIY Forum/Home improvement advice forum

 

 

A-Z CONTENTS | DISCLAIMER | DIY VIDEO | HOME | SAFETY FIRST | FORUM RULES

It is currently Mon Aug 20, 2018 10:12 pm
Visit Hilti


Time zone: Europe/London [ DST ]




 

 


Post new topic Reply to topic  [ 7 posts ] 
Author Message
PostPosted: Tue May 29, 2018 12:20 pm 
Offline
Newly registered Member

Joined: Tue May 29, 2018 12:17 pm
Posts: 2
Has thanked: 0 times
Been thanked: 0 times
Hi everyone, first post so be gentle :-)

Firstly, I'm not an electrician and realise the work I require is covered by Part P and notifiable. I will therefore be getting a sparky in to do the actual work, but I like to research my requirements, understand the work and decide whether to buy the hardware myself if cheaper. So this is advice to help with that, not to complete the full job myself.

I have a 5 year old house with external garage. The garage came with power supplied, via a large SWA from the house, to a consumer unit on garage wall with 2 MCB's, one for lighting (single bulb) and one for sockets (1 double socket). I have photos of the house consumer board and garage consumer board attached for more info on fusing etc. In the house, the garage MCB is a B16 alongside a 80A RCD. In the garage itself, the lighting MCB is B6 ad socket MCB is B16, with a main switch (63A).

I want a double external socket fixed to outer wall of garage, conveniently the same wall as the garage consumer unit, only 2-3 metres away. There is a spare (blank plate) in the garage consumer unit which could be used. My question is around connecting a IP66 double socket (13A) to the outside of the garage wall, hopefully coming through the wall to inside the garage and up to the consumer unit.

My questions:

1) Is there enough capacity on the system (house and garage consumer units) to take an additional double socket?
2) What size MCB would be preferred in the garage consumer unit, to connect the double socket?
3) What size wiring would be preferred to run from garage MCB to outdoor socket?

House consumer unit picture: https://drive.google.com/file/d/1MjNVYsMOMPN6shikxluD9jDL6ei4O43u/view?usp=sharing
Garage consumer unit picture: https://drive.google.com/file/d/1Fuf5bHh5RrN0CyF355gva2KR8B899s9D/view?usp=sharing

Thanks in advance!


Share on FacebookShare on TwitterShare on DiggShare on DeliciousShare on Google+
Top
 Profile  
Reply with quote  
PostPosted: Tue May 29, 2018 2:30 pm 
Offline
Senior Member
User avatar

Joined: Tue May 10, 2011 3:43 am
Posts: 2648
Location: North Wales
Has thanked: 64 times
Been thanked: 541 times
It is a lot easier if we can view pictures on the same site.ImageImageThere is nothing to stop you adding an outside socket.

However personally I would want an outside socket on a RCD which will not effect other circuits in the house, so I would move the garage supply to the non RCD protected side of house consumer unit and add a RCD to the garage consumer unit, so any water ingress will not effect other circuits in the house. But that is not required, just a good idea.

Why anyone fits a 16A MCB supplying a 16A and 6A MCB I don't know, seems pointless so the electrician may also change the MCB size once he has completed tests.


Top
 Profile  
Reply with quote  
PostPosted: Tue May 29, 2018 4:33 pm 
Online
Senior Member

Joined: Sat Sep 01, 2012 7:03 pm
Posts: 7707
Has thanked: 44 times
Been thanked: 1307 times
ericmark wrote:
so I would move the garage supply to the non RCD protected side of house consumer unit and add a RCD to the garage consumer unit,



Nice idea, one small problem.

Image

House board has Two RCD's (so there is no NON RCD protected side of consumers unit.

_________________
Take it easy, a forum is only a collection of opinions. Above, are mine.

Which is correct? Metre or Meter? Click the link. to find out more.

No such thing as "Thou shalt put this wire here, Thou shalt put that wire there" .............Take a picture BEFORE you do the job.

If gloom had a voice, it would be me. :mrgreen:

:idea1: How to post a picture on this forum Click here


Top
 Profile  
Reply with quote  
PostPosted: Tue May 29, 2018 4:45 pm 
Online
Senior Member

Joined: Sat Sep 01, 2012 7:03 pm
Posts: 7707
Has thanked: 44 times
Been thanked: 1307 times
infaddict, ericmark is saying that if there is an "earth fault" in your garage (or anything you plug into your garage) then it will be the house that trips so you will lose the smoke alarm burglar alarm, some lights and some sockets. ericmark's way round it is to move the garage supply to the non-rcd side of your consumers unit...........but it hasn't got a non RCD protected side.

Also the sockets in the garage are protected by a 16A mcb, but the supply to the garage is also protected by a 16A mcb, its not ideal. I would mention all the above to the electrician who does your job.

It will no doubt be cheaper if you buy all the kit for the job, but here in lies the problem. If it fails you will blame the electrician as he fitted it, but its YOU who supplied it so its your fault, not his. Also if you buy some "cheap rubbish" and it fails you will want the electrician to fix / repair it FOC, but he won't as it was YOU who supplied it, best let him get all the right kit for the job.

_________________
Take it easy, a forum is only a collection of opinions. Above, are mine.

Which is correct? Metre or Meter? Click the link. to find out more.

No such thing as "Thou shalt put this wire here, Thou shalt put that wire there" .............Take a picture BEFORE you do the job.

If gloom had a voice, it would be me. :mrgreen:

:idea1: How to post a picture on this forum Click here


Top
 Profile  
Reply with quote  
PostPosted: Wed May 30, 2018 8:59 am 
Offline
Newly registered Member

Joined: Tue May 29, 2018 12:17 pm
Posts: 2
Has thanked: 0 times
Been thanked: 0 times
Thanks for all the helpful replies guys. Gives me some useful info to talk to the electrician about.


Top
 Profile  
Reply with quote  
PostPosted: Wed May 30, 2018 1:49 pm 
Offline
Senior Member
User avatar

Joined: Tue May 10, 2011 3:43 am
Posts: 2648
Location: North Wales
Has thanked: 64 times
Been thanked: 541 times
Sorry missed the second RCD, there are ways around it, I did not work in domestic so the consumer unit type tested board was not used much by me, however some will take RBCO's and some there is not enough room, using RCBO's one RCD could be removed so you could have it so fault in garage does not trip house, but more expensive.

The get electrician to do all is good advice. I was in one job on the other end of this, the auto electrical place I worked in both sold to trade and general public, an alternator trade price at that time was around £18, the retail price around £25, we would fit customers alternators if they wished, so they could go to trade counter, buy an alternator for £18 then walk to garage section and pay £5 to have it fitted. Or they could simply say fit me a new alternator. So cost £23 or £30 for same job.

However if it went wrong, for £30 we would replace the alternator FOC, but for £23 we would charge £5 for replacing it, they were still getting it for less than the £30 however the amount of arguments over the £5 charge was unbelievable.

In your case worse, you buy stuff and it goes wrong, likely you did not get trade discount to start with, and you will need to pay for it to be replaced, and likely when you take it back the outlet will claim it was damaged by the electrician.

The electrician has more clout in the whole sale outlet, they want to sell him more stuff, so unless rather clear it was electricians fault, they will change it.

Offer to drill holes, dig trenches, and make good after he has finished to reduce costs, but not buying the gear.

I know my son was very wary of the customer helping after being caught out. He marked walls for chases and where holes should be drilled, and it was agreed all would be done by Thursday, however on Thursday it was not done, so either my son did it himself or he would loose a days work, so instead of 8 hours he was there 12 hours, but the guy did not want to pay extra, so son vowed never again. I think most electricians have been caught out like this, so many will allow you to make good, but not prepare for them.


Top
 Profile  
Reply with quote  
PostPosted: Wed May 30, 2018 7:24 pm 
Online
Approved Electrician

Joined: Sun Apr 24, 2011 7:01 pm
Posts: 2641
Location: South Yorkshire
Has thanked: 165 times
Been thanked: 571 times
You can always supply the outside socket via a double pole switch inside the garage. If the switch is left off when you go on holiday etc then even if water gets into the socket the RCD will not trip and the contents of your freezer will be fine.

A 16A MCB feeding a 16A MCB is not important in this case.


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 7 posts ] 


Similar topics
   

Time zone: Europe/London [ DST ]


Who is online

Users browsing this forum: tigertiger and 0 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Visit Solent plastics


 

 

 

News News Site map Site map SitemapIndex SitemapIndex RSS Feed RSS Feed Channel list Channel list
ultimatehandyman privacy policy

Contact

 

Powered by phpBB® Forum Software © phpBB Group

phpBB SEO