testing

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  1. Weezy

    UK Exceeding the max Ze in this situation still be considered to comply?

    If the max Ze for Tncs is 0.35 but you had a 1361 60amp fused isolator before the c.u with the 1361 having a max Zs of 0.56 (from the 80% chart) if the recorded reading at the c.u was let’s say 0.47 ohms would that now be considered to comply? i can’t see why it wouldn’t.
  2. timhoward

    Practical question about 3 phase IR testing

    Regarding 3 phase IR tests for initial verification, I'm wondering how people actually do it efficiently. GN3 says to IR test between all phase permutations, then: L1+L2+L3 connected together to N L1+L2+L3 connected together to E N to E The OSG further comments that if the group test to earth...
  3. M

    PFC Testing

    When testing PFC is it ever acceptable to test with Main Switch On, all MCBs On and from the Outgoing Side at DB. The methods I have seen instructed were with the supply isolated from the supply and on the Incoming Supply terminals, but was shown the way described in the first sentence by...
  4. M

    Polarity testing supply

    I'm probably missing something obvious here but if the polarity is reversed upstream of the cutout How are they getting 230v between N-E ? Surely they're still linked at the cutout ?
  5. M

    IR Testing DOL Motor

    When testing a DOL motor is the best method to disconnect the cables from MCB to DOL and connector block them. Then disconnect cables from DOL to Motor and connector block them and then IR both set of cables. Or would switching the isolator off and test from MCB to DOL then DOL to Motor without...
  6. M

    Testing

    During the sequence of testing on a 3 Phase DB, would the main switch be off on all tests (live and dead) except for ZS and RCD test where it would be switched on. Thanks.
  7. Bob Geldoff1234

    PAT testing certificate?

    After PAT testing appliances,do you have to issue a certificate additional to sticking the labels on? If so where are these certificates because there aren't any on my NIC portal. Any help would be appreciated.
  8. mjtefc9

    Testing

    Good morning ! Does anyone do EICR's @ weekends or evenings that needs a hand in the Liverpool area / Northwest ? Got my 2391 coming up in Sept and I can't get any practical work in and my day job is hectic Monday to Friday.... I'll tag along for free like : -)
  9. M

    110v pat testing

    I need to learn more about testing 110v stuff. Can only find one Seaward video on YouTube about testing a transformer! Any other sources? For example - how to test 110v extension leads etc.
  10. B

    RCBO testing

    I have come across a couple of Eaton RCBOs in Memera 2000AD boards and they don’t trip at the board when tested but do at the point of use/load, what’s up with that then? Cheers
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