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Switches, MCBs, RCDs - Sequence of wires, IN and OUT?!

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  • 22-10-2006 3:26pm
    #1
    GreySquirrel
    Registered Users Posts: 252 ✭✭


    On Switches, MCBs, RCDs, marked with numbers, what is the correct sequence for incoming wire? Does it go to side 1 or side 2?

    A make or break switch shouldn't care?

    But what about MCBs, RCDs, RCBOs, must the live phase come in top or bottom? 1 or 2?

    Is it brand dependent?


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    #2
    Copper
    Registered Users Posts: 68 ✭✭Copper


    It doesn't matter for most RCBO's, RCD's and MCB's.

    It does matter for switch fuses, fuse switches and the old screw-in neozed fuses, if you get it wrong the outer ring of the fuse holder will be live. For them its brand dependant but normally the phase goes in the bottom.

    I normally put phase in bottom (no. 1) and load on top (no. 2), unless its easier to do it the other way.


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    #3
    GreySquirrel
    Registered Users Posts: 252 ✭✭GreySquirrel


    Looking at the screw in fuse, I'd worked that out.

    the RCD is marked 1 on top, 2 on bottom


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    #4
    GreeBo
    Registered Users Posts: 27,164 ✭✭✭✭GreeBo


    rcd's and mcbs are on when "up" and off when "down"
    The supply usually goes in the bottom from the CU's I have seen.

    On a somewhat related note, whats the easiest way to remove power from the whoe CU so it can be replaced?
    Im assuming I have to remove the main fuse from the ESB box but how do I go about this?
    Id rather not just stick my hand in and pull it out :rolleyes: is it switched?


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    #5
    GreySquirrel
    Registered Users Posts: 252 ✭✭GreySquirrel


    There are all sorts of issues, safety and legal, about "tampering" with the ESB fuse


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    #6
    GreeBo
    Registered Users Posts: 27,164 ✭✭✭✭GreeBo


    yeah, but any electrician (RECI or not) is just gonna do the same thing right?


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    #7
    Hoagy
    Registered Users Posts: 708 ✭✭✭Hoagy


    No, that's why we have apprentices.


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    #8
    charlie@w.d
    Closed Accounts Posts: 118 ✭✭charlie@w.d


    theres a switch that u can turn of in the esb cabinet u have to unscrew a shiny flat head screw and take of a lid and behind it is a switch, which u pull down.

    sorry just realised not many have this option, what im on about is for mostly new builds with their own seperate esb cabinets


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    #9
    Copper
    Registered Users Posts: 68 ✭✭Copper


    No, that's why we have apprentices.

    Lol.

    Or you can do it live.


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    #10
    GreeBo
    Registered Users Posts: 27,164 ✭✭✭✭GreeBo


    Copper wrote:
    Lol.

    Or you can do it live.
    nah, *thats* why you have apprentices!

    We have a separate esb cabinet outside the house (with the meter) but the bit where Im assuming the fuse is is hidden behind a plastic cover "sealed" with those esb tamper wire thingies.
    If I open that whats gonna be inside? :)


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    #11
    GreySquirrel
    Registered Users Posts: 252 ✭✭GreySquirrel


    GreeBo wrote:
    nah, *thats* why you have apprentices!

    We have a separate esb cabinet outside the house (with the meter) but the bit where Im assuming the fuse is is hidden behind a plastic cover "sealed" with those esb tamper wire thingies.
    If I open that whats gonna be inside? :)

    Here, stop fiddling with your thingies and get back to putting the phase in Copper's bottom. :)


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