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Class 2 does not require an earth i guess 

Hello i have got a question about old house wiring its at my nannas and sisters houses on the downstairs and upstairs lights.They have no earth cable within the pvc at all ,my gut reaction was this is a code the lights will need rewiring.I am on with my nannas at the moment, i cant remember...

in my experience when in a domestic house when the supply cable is inside the house directly near the fusebox it normally is a tns system and its easy to see off the sheath of the supply cable in to earth block etc.A house i went to exactly the example i mentioned it had an old earth wire looked...

THere is no gas pipe in the garage or water pipes so no need for a 10 mm earth a get you the armour is fine as an earth all thats in there is socket and switched spur for lights got there finnally yes the 4mm is fine for the supply but on the other hand if there is gas meters water stop taps yes...

I Was going to use the armour as an earth for a 2 core 4mm on a 16 amp breaker off the house board glanded off in to a garage socket next to it fused spur for the lights at the moment.but at a later date change put a garage board in the garage when i get hold of one people on the forum have been...

Andy your saying look at 544.1 to me thats main protective bond 10mm so run a separate 10mm earth with a 4 mm 2 core armoured. Just doesnt seem right

I dont know andy i said to my mate id give him the 2 core 4mm armoured he is doing the job not me to be honest i dont know clearly im missing something here

RIght andy i test houses with no garage supplys what so ever all i have to know is whats a main protective bond a supplementary bond and thats it a dont know is my answer an earth equipotential bond ?or can it be worded main equipotential bond 10mm ?

4Mm or 6mm 

On an answer previously im just saying it was mentioned that the armour as an earth wouldnt be big enough for a 4mm 2 core thats if any equipotential parts in the garage.Im thinking why not surely the armour is equal to a 4mm core that would of been there if the armoured i was using was a 3 core

WHat about using an armour as the earth as i say ive happen to have 2 core armoured 4mm that i will be giving my mate to do the job i mean an earth is an earth isnt it just as long as its stated on test sheet (armour)  ideally yes 3 core is this perfectly fine with the 2 core i know i ask a lot...

I Read a good section in the on site guide 7.2.5 its mentioning socket circuits and cables withouta metal covering need rcd an armoured has a metal cover  so an armoured doesnt need it.manator your post what a coincidence you mentioned 2 core i was going to give my mate the armoured to do the...

A Tncs binky

Had a brief look in bs7671 found nothing ill look in on site guide tomoz b easier to locate

OK i will read up on my bs7671 under locations in a garage 

Forget about the total separate tails with db1 and db2 nothing wrong with it worked it out myself .As far as the armoured from house board in to garage definetly rcd protection cheers for your little or no help on this one its like getting blood out of a stone when i ask something !

The reason why im asking is my mate is doing work on his garage plus the electrics i havent done many garages the ones at my work just get cut off because they arnt private houses.i would say yes the armoured does need rcd protection its like when you dont do them often im its like ill just rcd...

Sorry i honestly wasnt thinking at all industrial sub mains are not rcd protected so why is it any different for a domestic sub main its being on domestic i just thought sub mains had to be rcd protected with the armoured being outside or underground aswell thats how ive been doing them so...

WHen installing cables from new i know obviously they need to be rcd protected.When i put garage armoureds in as a  off the house board i go off the rcd side in to the garage board obviously the circuits are protected by rcd in the rcd fuse box my question is does the sub main armoured cable...

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