[Jewelry making - Article 00074] - Re: [Orchid] Anodzing Power Supply

[John Burgess]

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    G'day; My entire single story house is built on a single concrete
    slab. There is heavy carpet with rubber underlay in all rooms except
    the workshops and attached garage.. All the workshop and garage
    areas have bare or painted concrete floors. But those areas are all
    protected  by what we call an "Earth Leakage Breaker" or what you
    call a "Ground Fault Switch" This means it sits between earth and
    live cables and as soon as it detects any current flowing to earth,
    it fires instantly, cutting off all power to the outlets. Since it
    is the volts times amps that kills, I checked my installation and an
    earth leak of 0.005amps (five milliamps) cuts off all power in a
    fraction of a second. Thus if the earth fault occurred between you,
    the ground  and and the live wire, all you'd feel is a tiny instant
    tingle as the switch flicks off with an audible bang. To restore
    power the switch is simply reset to 'ON'. If the switch immediately
    goes to off, then you have an electrical fault and you had better
    call in an electrician. If you touch the live and neutral wires
    together, the main power circuit fuse will blow. The leak detector
    switches are not very costly, but must be fitted by a registered
    electrician. But you can also buy power extension sockets with a
    built in earth leakage breaker. 

Cheers for now,
JohnB of Mapua, Nelson NZ

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