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New pump tripping circuit breaker.

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Comments

  • #32
    2011
    Moderators, Home & Garden Moderators, Technology & Internet Moderators, Regional East Moderators Posts: 12,531 Mod ✭✭✭✭2011


    Risteard81 wrote: »
    Why is your garage on a Type D MCB?

    Good question.


  • #33
    2011
    Moderators, Home & Garden Moderators, Technology & Internet Moderators, Regional East Moderators Posts: 12,531 Mod ✭✭✭✭2011


    sundodger5 wrote: »
    L to E .620 M ohms Similar N to E and for the craic L to N 16.5 ohms.
    Although a previous reading gave .840 M ohms E to N and L.

    Just to be clear:

    Are you saying that when you test the insulation resistance between L & E on the pump you get 0.62 M Ohms? If this is the reading it is a fail.


  • #34
    Lenar3556
    Registered Users Posts: 1,346 ✭✭✭Lenar3556


    2011 wrote: »
    Just to be clear:

    Are you saying that when you test the insulation resistance between L & E on the pump you get 0.62 M Ohms? If this is the reading it is a fail.

    I have noticed appliances sometimes have capacitive links to earth for EMC compliance which give you these kind of readings. Would look like there is something amiss with that pump though.


  • #35
    2011
    Moderators, Home & Garden Moderators, Technology & Internet Moderators, Regional East Moderators Posts: 12,531 Mod ✭✭✭✭2011


    Lenar3556 wrote: »
    I have noticed appliances sometimes have capacitive links to earth for EMC compliance which give you these kind of readings. Would look like there is something amiss with that pump though.

    A multimeter or Meggar is DC so it will be blind to a capacitive link


  • #36
    sundodger5
    Registered Users Posts: 1,137 ✭✭✭sundodger5


    2011 wrote: »
    Just to be clear:

    Are you saying that when you test the insulation resistance between L & E on the pump you get 0.62 M Ohms? If this is the reading it is a fail.

    No it is not an IR test just a reading with a Multimeter.
    Have someone calling who has access to a megger hopefully tomorrow.
    As for the why that trip is on the garage, i have no clue and do not understand the significance of it tbh.


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  • #37
    2011
    Moderators, Home & Garden Moderators, Technology & Internet Moderators, Regional East Moderators Posts: 12,531 Mod ✭✭✭✭2011


    sundodger5 wrote: »
    No it is not an IR test just a reading with a Multimeter.
    Have someone calling who has access to a megger hopefully tomorrow.
    As for the why that trip is on the garage, i have no clue and do not understand the significance of it tbh.

    Yes, so most likely the Meggar will produce an even worse reading as the applied voltage is so much higher. Is the RCD is tripping? If so this could explain why.


  • #38
    sundodger5
    Registered Users Posts: 1,137 ✭✭✭sundodger5


    Yes RCD is tripping even with a brand new pump.
    Previous posters pointed to an IR test at this point. I just need to be sure before sending pump back under warranty.


  • #39
    2011
    Moderators, Home & Garden Moderators, Technology & Internet Moderators, Regional East Moderators Posts: 12,531 Mod ✭✭✭✭2011


    sundodger5 wrote: »
    Yes RCD is tripping even with a brand new pump.
    Previous posters pointed to an IR test at this point. I just need to be sure before sending pump back under warranty.

    Sorry I don’t have time to read the entire thread but have you attempted to power it from a different RCD??


  • #40
    sundodger5
    Registered Users Posts: 1,137 ✭✭✭sundodger5


    no, did try to power it from a different cable. Still tripped that RCD.
    In my non expert head based on what we have eliminated so far it looks like faulty pump or iffy RCD. My Expert will hopefully clarify and i will post the solution when i find out.
    Might help the next fella.


  • #41
    sundodger5
    Registered Users Posts: 1,137 ✭✭✭sundodger5


    IR tester came and the new pump is faulty. Mystery solved.
    Just my luck to get a dud.


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  • #42
    Frankx
    Closed Accounts Posts: 119 ✭✭Frankx


    sundodger5 wrote: »
    IR tester came and the new pump is faulty. Mystery solved.
    Just my luck to get a dud.

    Unexpected outcome

    Hopefully it's not something else


  • #43
    Bruthal
    Closed Accounts Posts: 13,422 ✭✭✭✭Bruthal


    Frankx wrote: »
    Unexpected outcome

    Hopefully it's not something else

    What would you have suspected here?


  • #44
    Frankx
    Closed Accounts Posts: 119 ✭✭Frankx


    Bruthal wrote: »
    What would you have suspected here?

    Was playing devils advocate as the pump is new

    There's a chance the pump was incorrectly wired or fault on the cabling from the socket


  • #45
    Bruthal
    Closed Accounts Posts: 13,422 ✭✭✭✭Bruthal


    Frankx wrote: »
    Was playing devils advocate as the pump is new

    There's a chance the pump was incorrectly wired or fault on the cabling from the socket

    There was, but once the ohms test showed high readings Phase to E and N to earth, and low Phase to N, that indicated the pump was correctly wired to the plug the OP had setup.

    Faulty cable would often, or usually, trip an RCD without the actual load connected to it being on.


  • #46
    Frankx
    Closed Accounts Posts: 119 ✭✭Frankx


    Bruthal wrote: »
    There was, but once the ohms test showed high readings Phase to E and N to earth, and low Phase to N, that indicated the pump was correctly wired to the plug the OP had setup.

    Faulty cable would often, or usually, trip an RCD without the actual load connected to it being on.

    Probably right but all we have is bits of information from a non electrician

    It's probable that an IR test was done correctly and proved the new pump is faulty


  • #47
    sundodger5
    Registered Users Posts: 1,137 ✭✭✭sundodger5


    IR test done by a guy who does a lot of work commissioning pump stations etc. So i assume it was ok.


  • #48
    Frankx
    Closed Accounts Posts: 119 ✭✭Frankx


    sundodger5 wrote: »
    IR test done by a guy who does a lot of work commissioning pump stations etc. So i assume it was ok.

    Should be fine in that case


  • #49
    dodzy
    Registered Users Posts: 9,905 ✭✭✭dodzy


    Hope you’ve no hassle getting replacement having shortened the cable. Sellers can be finicky with stuff like that.


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