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<blockquote data-quote="binky" data-source="post: 548516" data-attributes="member: 490"><p>trouble is, it takes up to about a meter of plastic pipe to fully insulate against leccy travelling through the water depending on the impurities in the water itself. The only way to really find out if a fly lead is needed is by testing exposed pipwork for an earth path, although I cn't think what the acceptable resistance is off the top of my head. </p><p></p><p>I had a call ot many years ago to investigate 'noises' from under a bath. To cut along story short, whoever had fitted the bath had put a screw for the bath frame (plastic bath) through an old immersion cable that had not been disconnected at the board. This in turn was making a length of copper pipe live, and occassionally leccy was arcing through the water past a plastic elbow. Bastard nearly killed me, I discovered the pipe was live when I brushed my arm past it, and it was on old rewirable fuses, no RCDs to be seen!</p></blockquote><p></p>
[QUOTE="binky, post: 548516, member: 490"] trouble is, it takes up to about a meter of plastic pipe to fully insulate against leccy travelling through the water depending on the impurities in the water itself. The only way to really find out if a fly lead is needed is by testing exposed pipwork for an earth path, although I cn't think what the acceptable resistance is off the top of my head. I had a call ot many years ago to investigate 'noises' from under a bath. To cut along story short, whoever had fitted the bath had put a screw for the bath frame (plastic bath) through an old immersion cable that had not been disconnected at the board. This in turn was making a length of copper pipe live, and occassionally leccy was arcing through the water past a plastic elbow. Bastard nearly killed me, I discovered the pipe was live when I brushed my arm past it, and it was on old rewirable fuses, no RCDs to be seen! [/QUOTE]
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