Hi helio007 , I think they have used a different calculation but your answer would also be right.
They seem to have used the 0.15 value,
0.15 x 60 x 1.2 (70 degrees ) = 10.8v,
Hi , if you use the resistance values from cable manufacturers like Batt cables then the resistance of 35mm is 0.524 and the resistance for the armouring is 2.1 .
So 160 x 0.524 x 1.2 (70 degrees ) /1000 =0.10
160 x 2.1 x 1.18 (60 degrees ) / 1000 = 0.39
therefore 0.10 + 0.39 = 0.49
Was the fault on the ground floor ring due to the neutral bar being linked ie as soon as a load was put onto the ring then the rcd tripped.
Has the circuit ever worked ?
Have you carried out your insulation resistance tests with the cpc connected to the means of earthing.
Your line conductor may be shorting to a piece of earth metalwork.
Code 3 for lack of rcds , recommend either rcbos to sockets and showers or fit dedicated rcd sockets to ground floor flats where they can supply anything for use outdoors.
The regs are not retrospective.
You could use an MK 1523WHILV which looks like a normal white dimmer but is capable of dimming LEDs at min 4w and max 70w.
Have done a few and have had no probs.
Before that I used to use a 1000w Varilight dimmer which worked very well.
I have had this discussion with a BC inspector before I was able to self notify and he assured me that if the DNOs earth is sweated on then it is the suppliers responsibility.
I had the case of what looked like a 4mm bare piece of cable sweated on .
I kept this as short as possible and...
Hi chaps , first post so hello to everyone.
One explanation could be a neutral to earth fault and the tester is picking up a reading through the connected load.
Not all switched spurs are double pole and can leave the neutral connected in which case if there was a neutral to earth fault then...
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