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extension. will have footing then 3 blocks flat on footing, then will have 2 blocks upright going to dpc. my question is that once i have put 50mm of sand then my dpm on the floor, when i get to the blockwork can i cement this into the nearest mortar joint. i was thinking of putting a few blocks...

this is hypothetical. but i now understand there is no need for the extra mcb as there is already over current protection at main cu.

ah i understand. IR testing whole circuit isn’t possible due to rcd and neon indicator, take both legs out of rcd test them individually, do the same with neon indicator and they should be all pass. also rcd doesn’t mess with r1+r2 readings do they? this makes sense now, i don’t have to take...

so you are saying i could have a small cu with only a 30ma rcd and nothing else? and i’m guessing they put the 40a mcb in with it as if you were tapping into the tails or main switch as you said? how would you write down the tests on a form as how would you split the cable and put in down as on...

i am a little confused about mostly testing of sub circuits this is what i get so far and i am basing this off of a shower sub circuit that has a shower cu with a 30ma rcd and a 40a mcb ;; also at the original board there is also a 40a mcb.: you have to test ze at origin of board, then you...

thank you very much this forum is the only one to actually reply. I have usually seen the brown and green 2 lead to do ze on meter etc, so i was confused when i saw this. and i will have to put the blue lead onto the live neutral on the dp switch not the neutral bar? and you think this will not...

problem is that the 3 leads that come with the tester are all in one block that has to be connected to the meter all at once, it’s not like a normal one where you can plug in brown and green if you want. I’m guessing it is better to use the neutral in a zs to prevent tripping the rcd, but when...

Slight confusion with this tester. when you do a zs it asks for the brown and green to be connected and has the half sign to show that the neutral would be better to connect, obviously connecting this would be better for the rcd zs? anyways when doing ze, do i have to connect the neutral as it...