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  1. sparky1508

    Investigation on massive electricity bills

    Hi all, This morning I visited a new client who needs me to find out why there bills are so high. At the moment I can only give a quick rundown of the installation as it was just a general chit chat about the issue. I will be going back to do some proper investigation in a week or so. This is an...
  2. sparky1508

    No RCD on entire installation

    Hi all, I have done a small job of installing a radial circuit and adding a spur to a ring final circuit. I am not too sure about the existing installation. It is in a commercial premises office type with a single phase CU. I have an issue with the fact that there is not an RCD to be found. I...
  3. sparky1508

    TT earthing arrangment and CU

    Hi all, Would it be possible to get a little advise from the guys. I have today been to look at a job whereas there is a TT earthing arrangement with no 100ma time delayed RCD on the incoming tails so that is the first thing that needs to be done but the question is, the existing CU has a 30ma...
  4. sparky1508

    Dodgy wiring

    Hi all, Changed some standard pendant lights today and the wiring was a bit dodgy. The first light I looked at had 3 red ( normal ) 1 switch line ( normal ) but 3 neutral and 2 cpc. One I the cpc was sheathed in black and connected in the neutral of the light a continuity check confirmed it...
  5. sparky1508

    Testing for MWC

    Hi all, I have recently finished a job and need to do the necessary tests to fill out the MWC. Can I do the earth fault loop impedance test with all lights on as this is in an office environment and switching all lights off is not practical. Also doing the insulation resistance test is not...
  6. sparky1508

    Switching non timer extraction fan

    Hi, Can't seem to find anything in the regs but I have been asked to fit an extractor fan in a small cupboard containing some IT equipment which gets quite warm and it's just to dissipate heat out of the cupboard. My question is, as it's a fan without run on timer I am using T&E to power it...
  7. sparky1508

    Insulation resistance problem

    Hi all, I have done an insulation resistance test on a ring final circuit today and when I do L - N I'm getting 0.01Mohm. Checked all sockets for loose connections but found nothing. I plan on splitting the ring tomorrow and testing each individual length from socket to socket. It's gonna be a...

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