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I did twig!

I do appreciate everyones advice! But my backround is being given drawings with circuit references and installing containment to accomodate! I am perfectly capable of connecting circuits up in a board and testing. But not fully clued up with the main earthing!

It is a TN-C-S system. I am proposing to install an 8way 30mA dual RCD Wylex board.

thanks sercurespark ill look it up tomorow! Dont habve the regs handy!

This forum is for advice not to slag others off! I am a spark! Not everybody knows everything!

and its a terraced house!!! cant go round!

its a listed building with concrete floors and ceilings! All newly decorated with the CU at one end of building and gas and water at other end!!

I am a fully qualified spark! I am new to domestic work as only worked on commercial projects from drawings with a large company! So basically your saying that regardless of the situation I must bring a 10mm earth from MET to gas and water??

can you explain RF lighting?? Sorry for my ignorance!

I see your point but what difference would it be to a TT system?

Im installing a new consumer unit in a property, but it is nearly impossible to get a 10mm earth to gas and water without trunking around skirting boards which would look hiddious!! Is there anything that would stop me from installing an earth rod and running earth from there to gas and water...

Im doing a pereodic test tomorow and I know that there is no main earth to the gas or water. Would it need a 10mm earth pulled in to ensure a pass? Or would it go down as a code 4?? Any advice appreciated!

Thanks Coljak

How much do crabtree RCBOS cost from wholesalers approx??

I may be being a bit simple but can u explain?? If all circuits are protected by an RCD and circuits are split correctly between the 2 then how is it taking shortcuts?? Regards

Why do alot of sparks fit seperate RCBOS instead of a dual RCD board apart from making the installation almost nucience free??? As far as im aware this is a much more expensive way of installing????

Yes it is TN-C-S system and tails are 25mm! Thought that was the case! Thanks

If I replace the conusmer unit in domestic premises the main earth has to be upgraded to 16mm but do I have to upgrade the earth to Gas and Water to 10mm too?

Good answer lol