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GavinWebb95

Hello people, recently I've come across fitting an earth rod and the Ze reading I got was 77.4, is this acceptable and in range? Also what are the maximum Zs readings for TT systems?
 
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BS7671 suggests 200 ohms to be stable. NICEIC say 100. you will be relying on RCD for fault protection, and the max. Zs in the case of a 30mA RCD is 1667. with a figure of 77, though, i would be looking to fit longer screwde together rods.
 
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