NICEIC Certification Scheme NICEIC registration & Rewire to a shed And supply

[Sintra]

sorry to jump in guys so on a TN-C-S supply
on a SWA to a shed
at the db you wouldnt provide a 30 mA RCD to protect the SWA as its mechanically protected is it ok as he suggested to fix the SWA to fence does it need protecting with conduit or should it be buried in sand at a depth of 450mm ?? in Ducting and marked with tape

No need for RCD at supply end providing Zs of sub main is adequate.
SWA does not require protecting in conduit.

but deffo would provide one at the shed ccu for socket outlets
and would you not have to provide a Earth Electrode does it depend on the distance of the run

Yes RCD required at shed cu. No need for electrode unless main bonding is required to extraneous conductive parts.

is it ok to use 3 core armoured and use the 3rd core as the CPC
and do you still have to banjo the armouring of the swa at the Main DB/ccu

Yes & yes

sorry to jump in but i to am doing this at my brothers and using for my ELECSA assessment as well as changing the existing ccu and existing fuseboard in the house for 1 17th edition compliant ccu just so i know wether to get dual rcd split board or 3 way spit board with 2 rcds and couple of unprotected circuits sorry for all questions but just want to get it right

Hope that helps.

 

[Sav]

Hi,
I would not clip the swa to the fence, as a fence is classified as a temporary structure which can be moved.

Best to put in the ground, with tape on top. I had some of those heavy duty troughs you put in the driveways to collect the water.
I turned them upside down and put on top of the swa with the yellow warning tape.
Best regards,
Sav

 

[brucelee]

Hope that helps.

Once again thanks very much Sintra always good information and advice and straight to the point as usual its good to be able to get advice from someone as knowledgable as your good self thankyou

a few questions more for same job if thats ok

my brother also wants garden lighting he is sick of the solar ones

if he chooses Low Voltage then should i run armoured round the garden and then use waterproof Junction boxes to come off for individual lights he may choose wall mounted and some installed in the borders can you recommend best method what type of cable is acceptable from the JBs to the lights and does this need mechanical protection wher it comes from underground to the lights
like the gu10 mains voltage type

if he chooses extra low voltage low voltage like the pre wired CE sets do these also need mechanical protection do they have to be run underground or is it ok on surface???

only wiring i ever done in the garden was for new build showhomes with floods in the borders shining on the showhomes on timers using armoureds with flex to floods and the through boxes filled with the brown waterproof compound????

r is it acceptable to fix SWA along the fence line as he said he may want some lighting on the concrete posts is this also acceptable

sorry for all questions mate just want it all to be right for elecsa registration and assesment
on that note do i still need to notify labc as well as elecsa before carrying out this work because i will be using this work for first assesment ???????

 

[Sintra]

Sorry mate but it's a bit late for all answers now. Hopefully some of the other members can advice you tomorrow.

 

[ezzzekiel]

can you point me to the regulation in the brb that says so?

 

[b-spark]

This would only apply if there were any services in the outbuilding which required main bonding....if a TNCS earth was used those services would have to be main bonded right back to the MET which would means a rod would be more practical.
As long as there are no services in the outbuilding requiring bonding TNCS can be used and the earth conductor sized in the normal way in relation to the line and neutral conductors.

We work closely with YEB / CE ELETRIC. on alot of UPS systems. They dont like export of a tncs earth system of anything above 25m (I think).If it has to be done they want rods in place. Might be different for other DNO's
Dont ask me why you get different answers all the time. But even the subby's crank on about it. Freedom and the like.

 

[Deleted member 9648]

We work closely with YEB / CE ELETRIC. on alot of UPS systems. They dont like export of a tncs earth system of anything above 25m (I think).If it has to be done they want rods in place. Might be different for other DNO's
Dont ask me why you get different answers all the time. But even the subby's crank on about it. Freedom and the like.

Interesting....I dont doubt you,but I go by the BRB which does not restrict the use of a TNCS system to supply outbuildings which is good enough for me.......Why 25m I wonder??....maybe you should ask them to justify their demands. I've said it on here before and I'll say it again, those who insist that exporting a TNCS to an outbuilding is bad practice and yet will happily install outside lights and sockets on the same system around the main building need to have a think about the logic of their argument....just my opinion