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greater

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  1. J

    End to end test r2 greater then r1 & rn

    Hi, Just a quick one, tested a ring today after new install, 2.5 singles in conduit. When i cam to do the end to end test i had these results:- Flat ring r1 = 0.44 rn = 0.44 r2 = 0.36 Kitchen ring r1 = 0.23 rn = 0.23 r2 = 0.15 Not sure why the r2 was lower on both circuits if all are the...
  2. R

    Protection for cables suppling Consumer Unit, due to distance greater than 3 Metres.

    Hi Folks, I'm currently doing a full re-wire to the Mother-in-Law's bungalow which she has just bought. The bungalow was built around 1960's so needs a complete over-haul with both electrics and other building works. The earthing system is TT. Currently, the supply meter is indoors in the same...
  3. spud1

    No RCD protection for socket outlets rated 32A or greater

    Hi Guys, Can somebody shed any light on why socket outlets rated at 32Amps or greater do not require RCD protection under BS7671? Presumably theres some maths behind it? And presumably the only exception is in a TT earthing System? Cheers chaps
  4. P

    Slightly high Zs on large ring circuit

    Hi all, I did a PIR yesterday at a largeish house (150m2). there is only 1 ring final circuit for all house sockets. Zs was 1.25ohms, vs 1.16 permitted maximum value. there is an RCD so additional protection in theory although the RCD did not disconnect at 5x 30 ma test. I will obviously...
  5. N

    Job situation around the greater Manchester Area

    Hey all im hoping for some help here from people living in the greater Manchester area. Im moving over there from Ireland in jan and have been applying for job after job for a month now without much luck. Im just wondering what the job situation for sparkys is like in the area and UK in general...
  6. Y

    RCD problem

    Hi All, I am having problems finding a fault and would appreciate any ideas, I have got an RCD on a ring main and on some sockets all tests are great but on some sockets the RCD is tripping at greater than 40 ms on 5x test any ideas?
  7. A

    Single phase inverters greater than 7kWA

    Hi all Hopeing someone may be able to help out, in short I'm trying to locate manufactures which produce inveters greater than 7kWA for a single phase only. Thanks all Tony
  8. P

    Hi from Greater Manchester

    Hi ! my name is John White , please be gentle, I am a newbie not only to this sight but also to this Industry. I live in Leigh nr Wigan / Bolton and work as a Mobile Dj however I am just starting a new business In - Service Inspection and Testing of Electrical Equipment, but prefer PAT Testing...
  9. J

    help with testing

    hi guys! im doing testing in work with my boss in preperation for my am2. when i do insulation resistance test on my lighting circuit it comes back with a test result of greater than 500 megohms but when i reconnect the circuit into the mcb and earth and neutral into the terminals i then tested...
  10. B

    Max neutral/earth voltage

    Hi guys, It's been 10 years since I was a sparky so I am out of date with current regs. Can anyone tell me the max permitted neutral to earth voltage at a spur. I think it is 1.25v. Please help!

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