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The tray is only in the communal area of a block of flats and will not enter any flat. So are you saying that it is not necessary to earth it at all???? Surely it would need some degree of earthing?

Ok earthing then. So what would csa of the earth cable depend on? The pyro has a pvc sheath so not directly in contact with the tray.

Hi, Just a quick question. i'm running some 10mm piros on some traywork. Is the bonding to the tray main bonding of supplementary bonding? The head is 3 phase rated at 200A but the piros are from a 3 phase ryefield board with 60A single phase supplies leaving to supply flats. I was advised by...

Yes corrosion, good point. Should it be 35mm like the incoming earth or will a smaller earth be adequate?

I'm fitting an isolator board which will have piro's terminated into it (with earth concentric pots) which feeds submains upto flats. This is fed via a ryefield board etc. I'm taking the concentic pots into the earth bar and the main earth coming in (35mm) onto the bolt which is directly onto...

Thanks RF. Its Rewiring submains to an old block of flats. Why it has to be piro I don't know, I'm pressuming the building is maybe listed? Its what our consultant specified just to make my life harder. Still I'm learning a lot. Any tips on straighening piro? (other than keep is straight...

Work gave me one of these rotary strippers yesterday and I had so much trouble with it I gave up. I put a new blade in it and it worked fine for a bit but then I had trouble getting it going again. Am I doing something wrong? Any tips for using it? I ended up stripping them all with my side...

I've been terminating a some Piro yesterday and just had a quick question. I'm new to terminating this cable so it was taking me ages yesterday but seems to be going to plan so far. My question is, I'm terminating 10mm 2core into an isolator board with an adaptor box and need about 600-700mm of...

Joke!!!!

Whats wrong with flex - isn't that what it does? flex ....

Evening. Looked at a job yesterday as some lights not working. Found that one of the 4 chanels on this clipsal cbus unit wasn't working. There was a spare way in the unit so i transfered the lights onto this and they work fine but only using the button on the actual unit. The system needs re...

Yes of course it could be, sorry. I'm going to check exactly what they want today. But in the mean time, if its TNS or TNCS it does not need an RCD to cover the sub mains, correct? I know that TT systems always have RCD's but I just can't understand why they are requesting them to cover the...

I don't know why they have asked for it to be honest as i'm not dealing with them personally. I will have to find out. Its not a TT supply its a TNCS from what I have been told. Its only a farm out in Wembly so there is still an under ground supply there (not over head) Like I said, all there...

Hello, I have a friend who works on a farm and has had some work done on adding/changing the metering to various buildings. The supplier has requested RCD's for the 3 supplies. There is a 3 phase 100a head feeding 3 SWA's, which have the meter and isolator in line before the swa. I have...

Had the same the other day. Did a PIR on a house and got a dead short on the boiler radial when the boiler was isolated. When i looked into it i found it to be connected the same as your pic, live and load in same terminals. Bloody plumber... :wink:

If u want to operate it by one PIR use a contactor in the circuit to switch the load

No idea, they may do.. Can you fit a small 2 way board to the side with RCD. More work but worth it. Its up to you. I would, but like we said there isn't any requirement. So do it before july if u don't want to fit one..

Can u fit an RCBO what board do u have?

Its up to u as there is no regs to suggest to. But I would use one...

got there b4 me streetlighter :evil: