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Thanks for the replies! that has made it a lot clearer now

This has probably been already answered but i just wanted to confirm that zs values on tt systems are acceptable upto 200ohms? as disconnection times cannot be met, are we totally relying on the rcd? i ask because, i done all my dead tests on a socket circuit which were acceptable, i found that...

zero the meter for no trip loop test?

Thanks ADS, what you have said makes total sence to me now. Thats all i needed to know!!

Quote:ADS I'd do a bit more reading and revision if I were you - before you start running around with your new meter It was information in a book that lead me to belive this in the first place, Maybe i have just missinterperated this information: Taken from book Brian Scaddan (insepection...

From a cpc at the socket to a copper pipe of a central heating system

hi, no haven't done a ring test yet. Only had a quick play with the fluke on rcd test and no trip loop test. After all your replies, i will start from scratch do all my cipper tests and hopefully identify the problem. just out of interest (as im still learning) i just wanted to know if...

thank you so much for your replies, will check ze and r1 + r2 values. What if after finding that it is a bad earth but cannot locate where the problem lies (say a broken earth on one of the legs) What would you do, just out of interest? would you bond to the cpc of the socket?

supply is tns will have to check ze (haven't opened up c/u yet, will check) yes it's rcd protected (checked tripping time, 16.6m/s @ 5 x) do you think it might have something to do with the supply earth? have you ever come across anything like this before?

Hi, i have just bought a fluke 1652 and thought i would have a quick go around the house. Whilst testing efli (z's) i found on the sockets it measured at 5.48 ohms. I checked in the onsite guide and discovered it should be a maximum of 1.24 ohms for a 30 amp mcb type 2 circuit breaker. I know...

is that the lever type of pushwire connections? just had a quick look on there site. Thanks for the replys, I think i will do it as Batty described!!

where can i get wagos and what type do you use?

thanks for the replies, yeah i have had a look under the floor boards and the cable is from the wrong direction and there is not much slack, typical.

I need to move a socket roughly 0.5m horizontally to the right, looking behind the accessory the cable runs directly up from the floor. Whats the best way of extending the cable? didn't really want to use a standard type junction box as they need to be accesable for maintainance (regs) and i...

Thanks for the reply's. its so frustrating not knowing if you have passed or not, think i will keep up the revision just incase! not being from an electrical backround its been extremly hard to revise so many different topics from basic terminology to earth fault loop paths, earth electrode...

Hi, just wondered if anyone knows what the pass mark is for 2391? (the actual pass mark not the pass rate) i managed to pass the practical first time but struggled with the theory exam. Also how long does it take to get the results back?

Hi, i understand how to test for PEFC and PSCC, and that the highest reading is recorded. It might be a silly question, but i don't understand the reason i am testing for it. The maximum breaking capacity of say, a 16amp type b circuit breaker is 6000amps and i get a reading for pscc of 0.45ka...

the only thing that was in the coments box was 'all sockets on radials and single cores used from consumer unit to first lighting point. To be honest i have gone around sleeving the earths on socket points etc. replacing broken sockets and it all looks in good condition from what i can see. what...

He has put all the radials for the sockets on a 16 amp mcbs. The single cores are only from the consumer unit to the first lighting point the rest is 1.5 t+e between light fittings

Hi, i was asked to look at a family members house the other day regarding a rewire. An electrician had fitted a new consumer unit from an old 3036 to a new split load board and upgraded the bonding. He had also rewired the lights, cooker and sockets in the kitchen. Before he left he said 'he...