Recent content by nrg

Thanks, anyone know where you can buy constant force springs?

Thanks for your suggestions I'll get it sorted ASAP. I didn't know if there was some kind of band that could be used like a bonding clamp to achieve this. What do distributors use on TNS systems where the lead sheeth is the means of earth?

Explain please, do you mean run a new cable?

Hi All I need some advice, I have been to look at a job for a mate who has moved into a new house. Basically he wants a new garage cu installing. There is a 4mm 3 core SWA going from a 32amp mcb in the house but the swa amour has not been connected to earth and the armour strands have been...

Hi Guys Thanks or all the suggestions, can I clear a few things up. * It's not a new installation it's about 8 year old. I queried that the whole system was covered by a 30mA RCD but having checked with my old man he said that's the way it was done by some sparks way back then !!! * The RCD...

Hi Guys I have a customer that is having constant random tripping of their RCD. After quite a lot of investigation I have found two things. 1) There is a lighting track in the kitchen that has LED gu10 style fittings that glow slightly even when the light is switched off. It is a track system...

Hi All Just to let you know it was the RCD inflating the reading somewhat ! I swapped the ring onto the non RCD side and the Zs fell from 0.84 to 0.52 swapped back and got 0.85. Changed the RCD and still got in the 0.8's. Very strange !!!! Hope this is of interest to you ? Anyone else had this...

The figures are well under the max Zs for the circuit, I'm just curious as to why they have increased significantly with the addition of a new board and a larger main earth cable. I'll let you know once I have been today.

All Thanks for all your suggestions I am there again tomorrow to connect up the cooker, so I will triple check the connections etc etc. Also Might do my dead test again an make sure everything adds up. What a mare, I saw the board and thought oh, thats a nice straight swap out in a nice, easy...

Hi fletchflash Yes all the calcs add up roughly and yes the Zs before the change was on a board without an RCD. I changed the main earth from 10mm to 16mm so would have presumed the Zs would have gone down not up. Anyway it's still within the limits and everything seems to be functioning...

Thanks for the quick reply. Unfortunately not, Basically the customer wanted the CU replaced and a new cooker circuit running. No other work has been carried out on her property apart from that. :|

Hi all Can anyone give me a suggestion as to why the Zs has increased since changing the consumer unit ? Before I changed the board the Zs was 0.51ohm on a particular ring (several sockets checked) but after it was 0.84 (checking same sockets) Any suggestions ? I have checked all the CPC's in...

Hi All a customer is wanting a ring in their garage (They can't explain why a radial won't suffice) so I