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Yep I've done everything that everyone suggested the first time around.I am doind the Ze at source(consumer unit)connected and un connected my earth stake is fine I'm getting 63 ohms. I'm going back tomorrow to try and see if I can solve this prob I'll keep you all posted!

Yeah the installation is energised and working.I haven't done R1+R2 yet it would be a be unreal that every circuit had bad continuity(I know its poss!) There are 15 circuits on this board so the house is large!One circuit I have just put in is a shower and it is still reading 200 ohms(I have...

This is the first time I've done a test on a TT system and I'm a bit stuck on the readings I am getting for loop impedence. My Ze reading is 9.7 ohms which I think is ok(pretty sure I'm reading regs ok saying 21 ohms max) The only thing is every reading I am getting from every circuit be it...

thanks for getting back!The tests are just done on a ring main on an average 3 bed house(grnd ring.1st floor ring and kitchen)I've made sure nothing is plugged in and all switched spurs are off!It sometimes takes a rediculous time and sometimes it will just hover at 400 and just keep beeping!

I have just started doing testing and trying to find my way with a Fluke(can't remember model number)It's a combined loop/meggar/rcd. When I am doing insulation resistance I believe I'm supposed to test at twice nominal voltage(ie 240 volts set it to 500) If it is clear and nothing is damaged...

Thanks to the guys for replying on the diversity question! Next question is I've done my calculations for another job and it is way way over 100amps.Now do I have to get 415volts into this house(seems far too excessive)Or just assume that most of the installation isn't to be used(only two...

Hopefully someone can help me on this I'm trying to work out diversity on the following circuits,not sure if I'm calculating correctly- I have 3 ring mains each protected by 32 amp breakers One is the kitchen ring with the usual microwave/dishwasher/washing machine/and two extra doubles so...

To give more detail on what I wrote- Four of the 6 amp circuits are -one is an alarm spur(normal house alarm supply)Two are for velux window supplies can't remember the load not a lot though!The other is a supply for a digital reading on a shower! I had to wire a lot of these back to the CU...

I'm working on this guy's house in London and we are coming to the end of the job and my foreman thinks we have too many circuits for a 100amp supply! We have a CU containing fifteen- 6 amp MCB's(all lights with no more than 10 on circuit) The above is on one consumer unit the rest here is on...