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Thread: Do Borehole systems require ELCB?

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    Diamond Member Justloadit's Avatar
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    Do Borehole systems require ELCB?

    Can anyone tell me if single and three phase borehole systems must be on earth leakage protection circuits?
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    Gold Member Singhms's Avatar
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    I am not sure but I think it might also take into consideration if you have the pump through a controller or not...
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    Diamond Member Justloadit's Avatar
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    Yes the pumps will have some type of electronic control for overload and over pumping.
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    Diamond Member AndyD's Avatar
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    With the regs as present it would depend on the method of installation but as long as the supply is not on a plug and socket and the circuit only supplies the borehole then it's unlikely it would require RCD protection. Whether it's 3 phase or single phase makes no difference when it comes to RCD requirements.
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    Although submersible pumps 7.2.4.4.2 falls under the pools, spa's etc wouldn't this also apply to boreholes.

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    Diamond Member AndyD's Avatar
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    The regulation 7.2 addresses 'Swimming pools, paddling pools, ornamental pools, spas and fountains'

    The purpose of those regs is to provide extra protection for people within these zones.

    7.2.1.1 The particular requirements of this subclause apply to the basins
    of swimming pools, paddling pools, ornamental pools, outdoor spas and
    fountains. The requirements also apply to the surrounding zones of all
    these basins. In these areas, in normal use, the effect of electric shock is
    increased by a reduction in body resistance and contact of the body with
    earth potential.
    A borehole wouldn't be classed as a special zone and as I understand it a borehole wouldn't carry the extra risk attached as outlined in bold above.
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