Rewiring house questions

[dannym]

Hi everyone, I've rewired my first house by myself - I havnt done a great deal of domestic work, mainly industrial and commercial. But I've got a few of questions that I havnt been able to find answers for. I think I know how to do them but would just like some conformation to boost my confidence with it lol.


1. On one lighting circuit I've taken the feed to 3 different rooms, and they are feeding 2 pendant lights and one extract fan and in the kitchen - 10 led downlights. My question is will these 10 downlights be ok on one switch? Or will it overload the circuit?

2. The external shed requires a feed. The shed is approximately 25m away from the consumer unit. My idea is to run a 2 core 6mm SWA to an IP rated adaptable box on the side of the house and connect a 6mm t and e into this and run it back to the board. Would this be acceptable? I know that I need an earth stake near the shed.

3. The board is moving the meter to an external location (the consumer unit has also been moved). But is over 3m away from the meter. I was going to use a KMF switch that would be boxed in somehow and use an SWA out of if to an IP rated adaptable box and then feed the consumer unit. Does this sound ok or does anyone have any other suggestions? I've never dealt with the electricity company directly before and the customer has spoke to them so I'm not sure what they'll leave me with.


Many thanks,

Danny

 

[joe.ninety]

Regarding No 2 on your list, have a read of this before you do anything...

http://electrical.------.org/wiring-matters/16/elect-inst-outdoors.cfm?type=pdf

 

[shanky887614]

surely 2 would be easier using a 3 core swa?

 

[dannym]

Sorry I meant to say I'd put the feed into an RCD consumer unit in the shed

 

[dannym]

Thanks joe.ninety, I may add it to the ring circuit then.
Shanky I don't think your supposed to have the same earth connected to the board so was going to use 2 core and then the steel as the earth and and use an earth rod at the garage point.

 

[wozz]

surely 2 would be easier using a 3 core swa?

Depends on where you are, around here 2 core is far more expensive than 3core. And you would have a wait on it aswel, so may be no easier.

 

[wozz]

1. Does the manuf recommend anything?

2. Ok

3. Think I understand, only concern would be connecting the swa to the kmf would need the be with a enclosure if I have read it correctly.

 

[DPG]

Has a new consumer unit been fitted? If so, what layout is it? Daz

 

[DPG]

And as Glenn would say...... what's the earthing arrangements here then? Daz

 

[shanky887614]

Depends on where you are, around here 2 core is far more expensive than 3core. And you would have a wait on it aswel, so may be no easier.

I meant opening posts 2.

 

[dannym]

Wozz -

1. the customer hasn't decided on what lights yet but I'll try and convince them to get low energy ones as I'm guessing that would be better.

3. I was thinking of clipping the SWA externally around/ up to the adaptable box, gland it in and then feed the consumer unit back entry.

Not yet Daz, the location has been chosen a and I've wired most of the cables to this location (it's in a porch). And don't know about the earthing arrangement ATM and I havnt spoke to the board.

thanks

 

[Octopus]

Wozz -

1. the customer hasn't decided on what lights yet but I'll try and convince them to get low energy ones as I'm guessing that would be better.

3. I was thinking of clipping the SWA externally around/ up to the adaptable box, gland it in and then feed the consumer unit back entry.

Not yet Daz, the location has been chosen a and I've wired most of the cables to this location (it's in a porch). And don't know about the earthing arrangement ATM and I havnt spoke to the board.

thanks

I think he meant what type of fuseboard are you using?

Re the SWA stuff manybe ring your scheme and ask them?

 

[telectrix]

what's this nonsense about banging in a rod at the shed when you'll most likely have a perfectly good TN system at the house? and 3 core SWA is the way to go. your only concern would be with extraneous in the shed if it's TNC-S. you'd then need a 10mm bonding cable back to the MET.

 

[uksparks]

Dannym, sorry of this sounds a little rude, Im not in one of those funny moods, but you say...

Hi everyone, I've rewired my first house by myself - I havnt done a great deal of domestic work, mainly industrial and commercial

Ok fair enough, so the fact that you are doing industrial and commercial should suggest you know your stuff inside out, and have vast knowledge as will be more than likely be working with 400v 3 phase etc, motors and lots of different lighting systems etc.

On one lighting circuit I've taken the feed to 3 different rooms, and they are feeding 2 pendant lights and one extract fan and in the kitchen - 10 led downlights. My question is will these 10 downlights be ok on one switch? Or will it overload the circuit?

Are you sure about the first part of your post...? As this just doesn't seem to add up to what I would expect from someone who is working on installations that, well, frankly are normally a lot more complicated and require more knowledge etc. You are asking if 10 LED lamps will overload a light circuit? Come on, clearly not... this seems like a very basic strange question from someone who has only been doing industrial and commercial work....

The external shed requires a feed. The shed is approximately 25m away from the consumer unit. My idea is to run a 2 core 6mm SWA to an IP rated adaptable box on the side of the house and connect a 6mm t and e into this and run it back to the board. Would this be acceptable? I know that I need an earth stake near the shed.

Sorry but this again doesn't add up from what you have fed us in your opening statement. What sort of supply is it? TNS or PME, is there any extraneous metal work in the remote end? How big are your tails as if you connect the earth and extend the zone to the shed, then stritcly speaking you would need a 10mm main protective bonding going to the shed.... (correct me if I'm wrong)

Sorry if I sound like a bitch, but this is basic stuff here which you SHOULD know if you are working in the places you suggest.

 

[uksparks]

what's this nonsense about banging in a rod at the shed when you'll most likely have a perfectly good TN system at the house? and 3 core SWA is the way to go. your only concern would be with extraneous in the shed if it's TNC-S. you'd then need a 10mm bonding cable back to the MET.

Well bugger me, I just saw your thread once I posted mine, so that confirms my thoughts are correct about the 10mm earth, well that's nice to know I'm not that thick!

 

[telectrix]

some years ago, it was common for training to stress that you could not take PME outside the house, e.g. to a shed. this misconception has now been mostly discredited, but some industrial sparks may have heard the old wives tale second hand and, not being used to doing domestic, believe it to still be true.

 

[uksparks]

some years ago, it was common for training to stress that you could not take PME outside the house, e.g. to a shed. this misconception has now been mostly discredited, but some industrial sparks may have heard the old wives tale second hand and, not being used to doing domestic, believe it to still be true.

That's no excuse, the BGB is there for a reason, people should read it and take it in.... right, so where did I put it, I know its round here somewhere.

Am I the only sad bugger on here who actually takes it to bed and reads it?

 

[dannym]

Murdoch - I havnt chosen a consumer unit yet.

Sorry but I've only recently finished my apprenticeship, completing the course in July so havnt been doing it for years and years. Talking about earth rods - I've heard that you shouldn't take the earth from the shed all the way back to the MET, but if that's old news then I thank you for the information. I heard it could cause nuisance tripping inside the house. There is no extraneous parts in the shed that need bonding

 

[Octopus]

Murdoch - I havnt chosen a consumer unit yet.

Sorry but I've only recently finished my apprenticeship, completing the course in July so havnt been doing it for years and years. Talking about earth rods - I've heard that you shouldn't take the earth from the shed all the way back to the MET, but if that's old news then I thank you for the information. I heard it could cause nuisance tripping inside the house. There is no extraneous parts in the shed that need bonding

So which scheme are you a member of?

 

[Octopus]

Murdoch - I havnt chosen a consumer unit yet.

Sorry but I've only recently finished my apprenticeship, completing the course in July so havnt been doing it for years and years. Talking about earth rods - I've heard that you shouldn't take the earth from the shed all the way back to the MET, but if that's old news then I thank you for the information. I heard it could cause nuisance tripping inside the house. There is no extraneous parts in the shed that need bonding

Which will ALWAYS be the case if the shed is supplied off an circuit or a "shared" RCD.