Recent content by mrloy99

  1. mrloy99

    Query; I have a panel board(mccbs) containing 100amp mccbs...

    I'm just the tester on the job. I still have't seen the switch rooms. I'm guessing that these are existing breakers at their lowest settings.. I'm just used to seeing a breaker at the origin that would protect the cable. I'm asking will they disconnect under fault conditions. I'm not sure the...
  2. mrloy99

    Query; I have a panel board(mccbs) containing 100amp mccbs...

    Hello engineers. I have a query. I have a panel board(mccbs) containing 100amp mccbs supplying various "life safety DBs" lifts, water mist pumps etc.The panel board has an MCCB of 250 AMP as the main switch. It is supplied from an ATS in 120mm sq.4 core with 70mm earth.A run of 20m.The ATS is...
  3. IMG20191006145507.jpg

    IMG20191006145507.jpg

    • mrloy99
    • Media item
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    • Category: Electrical Videos
  4. mrloy99

    Unable to separate wires on ring circuit

    Agree with Conlok coupler and bush. You have no mission threading it. Conlok will slide on. Only one half of it is threaded
  5. mrloy99

    Zs reading does not meet current regs

    The increase in loop impedance from. 0.20 at the DB to 0.79 on a 10m run sounds like something not right ,loose connection ?As another poster suggested. Try testing with probes at the socket terminals. But having the RCD ..it will be fine. ..⌛
  6. mrloy99

    How to save money on costly rcbo's

  7. mrloy99

    Help!!! Can't turn electric off!!!

    No update yet then?. If it's a flat that was devided up from the main house at one stage.Maybe you are on someone else's supply.. Yippee free lecky.Is everything else in the house off when the main switch goes off?
  8. mrloy99

    Dangerous upgrade to crabtree rcbo's

    Only if the neutral is disconnected at mains
  9. mrloy99

    Contactor control circuit

    No doubt I'm missing something here but the ones I've done, are switched from the surgeons panel and just come on at the same time as the socket, not on the control circuit. I don't think there is a requirement to provide a fail safe mechanism. A buzzer might be a better warning than a lamp.
  10. mrloy99

    Irish job query for testing

    Oh dear...Thanks...looks like we will need to get an inspector to inspect the inspector
  11. mrloy99

    Irish job query for testing

    Thanks Andy,but I think you are missing the point...I am not using BS6761 sheets
  12. mrloy99

    Irish job query for testing

    Hi I have a testing job to do in ireland.The test sheets i've to use ask for the R2 reading only..not R1+R2.....It is impractical to use the long wander lead method so I was thinking to work it out from R1+R2-(R1+Rn)/2=R2.........I was thinking to use this as opposed to R1+R2/2 to take account...
  13. mrloy99

    Is a borrowed earth allowed?

    There are other concerns too..maybe there could be another radial in the kitchen with a 'lost ' earth and the previous spark has already borrowed the cooker earth......So new cooker circuit in /old cooker circuit out might leave another circuit unprotected...Full test might identify that..I...
  14. mrloy99

    SWA in drain permissable?

    Agree..solar is the way forward for this instal.just screw it on the wall.job done..no pole required.Don't even need a test cert.
  15. mrloy99

    Anyone go the BBB to hand - reg regarding mix and match

    Are they nessary under the regs..I dont think so unless the cable is buried. Or is munufactors instruction Although I always do fit myself.

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