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    clarob's Avatar
    clarob Posts: 5, Reputation: 1
    New Member
     
    #1

    Jul 20, 2008, 05:18 AM
    Only one earth connection on appliance.
    Hello.

    I'm fitting a timer onto my immersion heater so it'll run on the cheap rate electricity at night.

    It fits on the cable between the switch (just an on/off switch) and the mains.

    Looking at the connections where I'll join up the ends of the cable it has five connections in this order (left to right)

    SL N N L E

    Where the first two (SL and N) are the live and neutral going out to the switch (and on to the tank) and the second two are the neutral and live coming in from the mains. The last one is the earth connection and is set apart from the others a bit (the others are marked by arrows showing which direction the current is going in)

    But, if I cut a cable with 3 wires (L, N and E) then I'll have two Earth wires and nowhere to fit one of them?

    The instructions make no mention of this - I think they assume it must be obvious. It's not! (not to me anyway... )

    Help!

    Thanks...
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
    Uber Member
     
    #2

    Jul 20, 2008, 05:29 AM
    You can use a short piece (pigtail) of earth wire and marrett (splice) it to the two earth wires, and insert the one pigtail into the earth terminal.
    clarob's Avatar
    clarob Posts: 5, Reputation: 1
    New Member
     
    #3

    Jul 20, 2008, 05:33 AM
    Wow that was quick!

    Would that be the same thing as putting the two earth wires into the earth terminal?
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #4

    Jul 20, 2008, 05:39 AM
    Yes, this is done often when more than one core (wire) needs to connect to a terminal rated for only one core.
    clarob's Avatar
    clarob Posts: 5, Reputation: 1
    New Member
     
    #5

    Jul 20, 2008, 05:42 AM
    Fantastic. I'll do that then
    Fingers crossed I don't blow up the house!

    Thanks
    Credendovidis's Avatar
    Credendovidis Posts: 1,593, Reputation: 66
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    #6

    Jul 20, 2008, 05:50 AM
    I don't precisely understand your problem.
    Why don't you install the timer just directly to the on/off switch? : you need to hook up to the following three wires (with a four wire cable) :

    1 - SL hot switched
    2 - N neutral switched
    3 - N neutral in
    4 - L hot in
    5 - E earth

    Your timer switch should be connected as follows :

    1 - SL hot switched : connect to timer in. Wire that went to tank connect now to timer out.
    2 - N neutral switched to timer neutral and to tank neutral.
    5 - Earth to all earth wires (a common connection to all).

    Note : wire 1 - SL hot switched should be cut, with the timer switch in between (i.e. the timer interrupts this wire) This last connection is a new separate connection point.

    If you need more information you can also come back to the board and discuss your findings!
    If necessary contact me by private mail (click on my handle and follow instructions) to draw my attention. I will than reply here again.
    If this helps solving your problem, than please rate this reply.

    Success !

    :)

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