New sub board for shed swa advice.

[Jcamerz]

Hi guys new to the forum after bit of advice. My family are installing a new shed in the garden and require a lot of power ie few sockets, lights. I am planning of running a swa fed from 32a mcb from the main board to a sub board.
Have a question-
Shall I install the new 32a mcb in the main board on the RCD side or main switch side?
Thanks

 

[bigbob1]

Is this still going ?? Sorry I've been away from here since last night, doing a shed supply,TNCS earthing.

Fingers crossed for you Dave.

 

[Ian1981]

Open circuit pen conductors only really an issue on TNCS arrangements tho isn’t it?
An accident can occur with that whether you have extended an equipotential zone to an outbuilding or if it’s just located in the one building containing the installation earth, the point being that the touch voltage should be lower than if you hadn’t provided protective bonding at all.
Show us evidence of this section 24’d site if you please?

 

[Leesparkykent]

Yep totally acceptable. Let me guess hdpe pipe? Metal shed extend it.
Use the armour as the cpc....oh no you have to use armour glands ahh a 4 core SWA? Baring in mind that’ll cost more than an earth rod honest to god comedy gold.
#E5

Sorry @bigbob1...I don't want to come across as rude but could you please put that in English that can be understood? Thanks.

 

[Ian1981]

Sorry @bigbob1...I don't want to come across as rude but could you please put that in English that can be understood? Thanks.

Basically he is right and we have being doing it all wrong for all these years!

 

[Toneyz]

Why is this?

As I posted before his just on here to wind up and insult everyone.Why does the IET who publish the regs show in their guidance notes you can export the earth? These E5 members seem to have clubbed together had a badge made (had to redesign it as not to be sued by TFL) to look down on high at us electricians to tell us we are all doing it wrong. For some reason, this Bob thinks he is all above us but no substance. The only one in this group that has got my respect is this Ninger bloke who does some very well presented and explained youtube videos.
Pete, I think that I have an earth rod if you want one.

 

[netblindpaul]

It should only be an issue with open circuit PEN/CNE conductors, but even on presented TN-S supplies these days they are often TN-C-S further upstream.
They annoying thing is the extents that the paying customer (& thus the spark) has to potentially go to so that the DNO's can get away with a lack of maintenance and investment in their networks, so that they can make more profit. Whilst sparks get a bad reputation for being accused of trying to rip off the punter because of the upgrading to earthing and bonding needed.
Eventually the public pays and the DNO's get away with it and make more profit that they can siphon offshore.

 

[ipf]

I don't really get all this, using the example from 2007, or whenever, to back up an argument for not extending a supply from a tncs system. It's not even an example of a neutral failure in such an installation (which is basically the argument for not extending). That is generally a problem caused by DNO ineptitude and, as such, should be down to them.

 

[Ian1981]

As I posted before his just on here to wind up and insult everyone.Why does the IET who publish the regs show in their guidance notes you can export the earth? These E5 members seem to have clubbed together had a badge made (had to redesign it as not to be sued by TFL) to look down on high at us electricians to tell us we are all doing it wrong. For some reason, this Bob thinks he is all above us but no substance. The only one in this group that has got my respect is this Ninger bloke who does some very well presented and explained youtube videos.
Pete, I think that I have an earth rod if you want one.

Sparkyninja he is a member on here widdler is his forum name.
Well informed YouTube videos , educational and a fellow north easterner!

 

[netblindpaul]

As I posted before his just on here to wind up and insult everyone.Why does the IET who publish the regs show in their guidance notes you can export the earth? These E5 members seem to have clubbed together had a badge made (had to redesign it as not to be sued by TFL) to look down on high at us electricians to tell us we are all doing it wrong. For some reason, this Bob thinks he is all above us but no substance. The only one in this group that has got my respect is this Ninger bloke who does some very well presented and explained youtube videos.
Pete, I think that I have an earth rod if you want one.

There is not necessarily a problem with exporting an earth if it's done correctly.
I think that there is some misunderstanding with regard to this, and yes there is a lot of guidance on doing this.
I think that the discussions with regard to the exporting earths has been quite vociferous and also, I think that the issue of exporting a PME earth is distracting from the rest of the thread, because it was not originally anything to do with exporting earths, merely about earthing of SWA & where.
Now that applies even within an equipotential zone.

Can we get an understanding that HASAWA and EAWR apply to domestic works when they are being done, and the installation that is left behind afterwards, now that it seems the legal case has brought enlightenment?

I would like to bring this to a close, but, until the application of the law is understood and agreed, then I don't see how this can be done.

 

[Colin33]

If so, what's it got to do with an external supply?
Just bad workmanship, surely, giving someone the opportunity to screw through a cable in such circumstances.

Ah, but some trades like to use 100mm screws when a 20 is all that's required ;-) I once had a fault while testing a new installation, turned out to be the fault of the plasterers who picked up the Paslode and fired 50mm brads into my cables while fixing edge bead.

 

[Colin33]

[QUOTE="
I can find publications from The IET and Stroma describing how to export the installation earth to outbuildings.
There is even a video by John Ward detailing how to export the earth.
That’s without really trying.

You on the other hand are unable to find anything at all to back your claims.

Why is this?[/QUOTE]

I can go one better. I've exported the suppliers earth AND stuck in an earth stake just for good measure! I must've killed countless innocents during the past 30 years of meddling with electrics! Hang on, is that the police at my door?

 

[Deleted member 26818]

They can refuse to provide an earth connection.

ESQCR section 8 first paragraph.
But it’s okay for you to use their earth?! It’s not a bad thing because when their neutral goes and someone dies they just go ‘he didn’t have permission from us’!!! I can show you a whole estate that was section 24’d because of supplies to garages done by a part P wonder. You are either a really sh*t troll or you genuinely think what you proclaim, which is worrying.

Oh yeah, of course.
8.—(1) A generator or distributor shall ensure that, so far as is reasonably practicable, his network does not become disconnected from earth in the event of any foreseeable current due to a fault.

 

[Deleted member 26818]

This is from Section 24 of ESQCR:
“(4) Unless he can reasonably conclude that it is inappropriate for reasons of safety, a distributor shall, when providing a new connection at low voltage, make available his supply neutral conductor or, if appropriate, the protective conductor of his network for connection to the protective conductor of the consumer’s installation.”
That’s a statutory requirement, the DNO must by law allow a consumer to connect their installation earth to the network neutral or in the case of TN-S the network CPC.
Yes the DNO can refuse connection, but only if the installation does not comply with BS7671 or for safety reasons or if it will disrupt the network.
An Installation that complies with BS7671 is deemed to be safe for connection.

 

[HappyHippyDad]

I expect members to get a bit cross and even a bit rude with other members who clearly don't know what they are talking about, sometimes we just can't help it! However, I would be really disappointed if the mods allowed their emotions to get the better of them and take sides against the (albeit silly in this case) minority (no names mentioned).
Good on you mods for remaining impartial so far in this thread

 

[ipf]

I can go one better. I've exported the suppliers earth AND stuck in an earth stake just for good measure! I must've killed countless innocents during the past 30 years of meddling with electrics! Hang on, is that the police at my door?[/QUOTE]



Aye, all sorts of bugs whilst staking, I'll wager..