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water heater/imersion rcbo or mcb??

  • 28-04-2010 6:38pm
    #1
    meath4sam
    Registered Users, Registered Users 2 Posts: 605 ✭✭✭


    says it in the title i have seen them on both just wondering wat regs say.the way i used to think was anything hand held is rcbo fixed apleince should can be on a mcb


Comments

  • #2
    mazthespark
    Registered Users, Registered Users 2 Posts: 630 ✭✭✭mazthespark


    ya but afaik all water heating appliances are to be rcd protected. i always would any way


  • #3
    M cebee
    Closed Accounts Posts: 4,431 ✭✭✭M cebee


    ya water heating appliances

    pumps as far as i can tell- from the rules

    i'm not 100% clear on the rules but any 'domestic' water heating appliance or pump i would have rcd protected


  • #4
    meath4sam
    Registered Users, Registered Users 2 Posts: 605 ✭✭✭meath4sam


    M cebee wrote: »
    ya water heating appliances

    pumps as far as i can tell- from the rules

    i'm not 100% clear on the rules but any 'domestic' water heating appliance or pump i would have rcd protected

    i would of never put a pump on rcd as it just a motor and motors are never rcds


  • #5
    M cebee
    Closed Accounts Posts: 4,431 ✭✭✭M cebee


    rules 555.3.2 regarding pumps

    i'm hoping someone can clear it up for me

    like i said i would put any domestic pump on rcd


  • #6
    meercat
    Registered Users, Registered Users 2 Posts: 4,828 ✭✭✭meercat


    yeah 4th edition of regs require rcd protection on all pumps.i would use separate rcbo on heating and ancillary pumps to prevent nuisance tripping of rcd.


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  • #7
    meath4sam
    Registered Users, Registered Users 2 Posts: 605 ✭✭✭meath4sam


    ok so domestic pumps on rcd but back to water heater/ immersion 2 people say they would put it on rcd or rcbo but is that law or just what some people do??


  • #8
    meercat
    Registered Users, Registered Users 2 Posts: 4,828 ✭✭✭meercat


    It's been a regulation long time that it must be protected by rcd


  • #9
    M cebee
    Closed Accounts Posts: 4,431 ✭✭✭M cebee


    if the element breaks down a fault current can flow through the main bond ,pipework etc.

    won't trip the mcb due to the impedance of the faulty element .

    and the water may appear to heat

    on old TT systems,the water wouldn't heat but the metalwork often went 'live'

    rcd eliminates the problem and indicates element needs to be replaced


  • #10
    DublinDilbert
    Registered Users, Registered Users 2 Posts: 5,401 ✭✭✭DublinDilbert


    meercat wrote: »
    It's been a regulation long time that it must be protected by rcd

    And here's why from my thread titled:-
    " Here's Why an RCD on immersion is important...."

    http://www.boards.ie/vbulletin/showthread.php?t=2055618389


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