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

 

[netblindpaul]

And how many of us have , or have ready access to all of these ?

Murdoch, the only one of those that you don't have free access to is GN5.

 

[Deleted member 26818]

Not sure that the difference between a MET and an EMT has any significance?
Regulation 8 of the EAWR is not particularly complicated, though it is a bit contradictory.
Tells us to earth all conductors not intended to be live, which obviously contradicts Regulation 9.

 

[Dave OCD]

Is BigBob1 NetblindPaul in disguise ? They're equally good at generating irrelevant posts, never being wrong and avoiding the answers to very simple questions by spouting an abundance of waffle.

 

[Deleted member 26818]

As it happens I have access to all of the listed publications, though my copy of GN5 is probably out of date.

 

[Strima]

I'll be back in a minute, getting low on popcorn and beer.

 

[bigbob1]

yes consult the DNO. It is their Earth not yours. It’s their TX not yours. It is their engineers that calculate where and when a neutral can be used as CNE.

No if you ask them for permission and they say ‘yes’ then you can. Obviously.

‘
With TT systems, the consumer must provide his or her own connection to Earth, i.e. by installing a suitable earth electrode local to the installation. The circumstances in which a distributor will not provide a means of earthing for the consumer are usually where the distributor cannot guarantee the earth connection back to the source, (IET)

IET. Guidance Note 5: Protection Against Electric Shock, 7th Edition.

That means you are guaranteeing it! But it’s not yours! ESQCR 24 you will be in jail.

installations supplied from TN-C-S (PME) systems, in view of the risk of danger in the event of an open circuit neutral fault on the distributor's low voltage network. ESQCR Regulation 25(2) prevents a distributor from providing a PME supply to premises (IET)
IET. Guidance Note 5: Protection Against Electric Shock, 7th Edition.

ESQCR 25 (2). Taking a DNO supply and provided earthing arrangement out of their specified equipotential zone. Jail.

You do understand that out of all the documents electricians ‘use’ BS7671 is the last one! And it starts with EAWR 89 and ends with ESQCR....with HASAWA and CDM regulations in between...

 

[Octopus]

Murdoch, the only one of those that you don't have free access to is GN5.

Are you EVER going to quote a BS 7671 reg that states clearly that SWA must be earthed at the supply end ?

 

[bigbob1]

I’ll let you in on a little known secret....

While the publisher and contributors believe that the information and guidance given in this work is correct, all parties must rely upon their own skill and judgement when making use of it. The publisher and contributors do not assume any liability to anyone for any loss or damage caused by any error or omission in the work, whether such error or omission is the result of negligence or any other cause. Any and all such liability is disclaimed. (IET)

IET. BS 7671:2018 Requirements for Electrical Installations, IET Wiring Regulations, 18th Edition.

 

[bigbob1]

ditto. Being a member of the IET and registered with the engineering council has its perks.

 

[bigbob1]

Are you EVER going to quote a BS 7671 reg that states clearly that SWA must be earthed at the supply end ?

Are you going to ignore ‘manufacturers instructions’? And are you going to let us all know what ‘SWA glands’ are produced for if not to go on SWA cable?
SWA is an extraneous conductive part......go back to college.
134.1.1

 

[bigbob1]

I’m guessing any MI you come across gets put through a stuffing gland!

 

[Deleted member 26818]

It is a requirement of ESQCR (Reg 24 I believe) for the DNO to provide consumers a connection point to either the network neutral or protective conductor, for connection of the installation earth.
Regulation 25 allows the DNO to refuse this connection only if the installation fails to comply with BS7671, or could pose a danger or cause an interruption of supply.

 

[bigbob1]

‘I don’t have to do a risk assessment because it doesn’t say so in the regs’ Said the domestic installer.

114.1

 

[Deleted member 26818]

ditto. Being a member of the IET and registered with the engineering council has its perks.

Does it?
Can’t say I’ve really noticed.

 

[Dave OCD]

I rest my case.