OP
moggy1968
reg 411.5
Discuss Was this the right decision? in the Solar PV Forum | Solar Panels Forum area at ElectriciansForums.net
I would recommend talking to Sibberts. I would say fitting a 100ma time delayed type B RCD might do the trick but your going to have to cut the meter tails and put them into a henley block in order to seperate it from the household electrics.
Good choice for your first one!! Welcome to the vertical learning curve society:banghead:
Thats why I suggested talking to Sibberts as this is a bit beyond my level. I would think a type B but am quite happy to be proved wrong!I dont believe it needs to be type b as its an isolating transformer not transform-less inverter
Vertical learning curve sounds about right. Thrown in at the deep in is another way of putting it. In my defence I do at least try and get things right and safe even if it doesn't always work out that way!
So I take it the issue is the fact that a fault current of 100ma or more would effectively knock out both RCDs simultaneously or that any fault current from the PV could stop the 100ma RCD from tripping under fault conditions? Just trying to picture the chain of events but if i'm honest I cant figure it out in this loaf of mine.
Ok thanks for the replies, I see what you are saying now and it makes sense regarding a type B RCD. As for earth size, OSG (green) table 4.4ii, beneath this table it states
Notes:
1 assuming protected against mechanical corrosion by a sheath
2 The main protective bonding conductors shall have a cross sectional area at least of not less than half that required for the earthing conductor and not less than 6mm
Am I interpratating that wrong then?
Thanks in advnce
Thanks Moggy, is the 2.5mm CSA main earth OK then? If you notice I quoted a couple of lines out of the OSG in a previous post, could you just verify that I am wrong, or if I have misunderstood that sentence from the OSG?
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