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tested

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  1. J

    RCD BS4293 ok or not

    Hi all, I installed an outside security light the other day and utilised an existing switched fused spur which was off the down stairs ring. The ring was protected by a 32amp breaker and a 30mA RCD (BS4293 type). When tested the rcd did not meet the 40ms disconnection time as per bs7671 regs...
  2. C

    Periodic Testing Percentage

    Hi guys just looking for a bit of advice. Just started a periodic test of a hotel, so far I have found the installation to be in quite good condition. What percentage of the installation do I have to test? I have read in guidance note 3 that you can do sample testing which is just a percentage...
  3. H

    Rcd Tripping

    Hi all, Does anyone know how an RCD can trip out.. when the board is dead. Main switch off, touch neutral to neutral bar and pop! Several times.. ??
  4. 2

    Pump tripping rcd

    Just tested a rain water pump with my portable appliance tester & it tested ok (earthing & insulation resistance). Plug it into the power point & it trips the rcd as the pump starts. The power point is fine have meggered the wiring etc. Any ideas?:confused:
  5. M

    Immersion fault

    Went to a job today. Here is the story. No power to Immersion. The immersion has not been used since the house was built (seventeen years ago). Central heating broke down recently and customer went to use above and no luck. New boiler and tank fitted, plumber checked elecs and told him to call a...
  6. C

    Testing two CU's in one house

    Quite a simple Q really - how would you go about testing an installation where you change the main CU but don't change the 'sub main' powering an extension. Also, I am changing the board to a 17th ed board - does the sub main 'automatically' need upgrading? At the moment it is fed via a 45A MCB...
  7. M

    Commericial Jobs, Do i need to test?

    Hi ive been asked by a mate of a mate to do the electrical work in this office and workshop. Things like add extra sockets, change lights possibly some 3 phase work etc When i do these jobs do i need to get it tested? Im not NICEIC and dont have test meters I now just do domestic and know...

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