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Anonymous Poster

Earth Electrodes

10/27/2006 8:29 AM

What is the max impedance value aloud when used with a 100mA rcd time delayed trip on a domestic instalation
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Anonymous Poster
#1

Re: earth electrodes

10/27/2006 2:57 PM

Max touch voltage allowed is 50V

so 50V/100ma = 500 Ohms

Max earth electrode resistance is 500 Ohms.
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JohnDG
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#2

Re: Earth Electrodes

10/28/2006 7:36 AM

I'd be very unhappy with an earth impedance greater than a few ohms, RCD or not. I strongly suggest you take advice from a local qualified electrician.

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