Dan007
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- Aug 7, 2011
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I've been reading a book by a guy called Anthony Hinsley where he states that when performing a Zs test you should disconnect the equipotential bonding conductors connecting the MET to the incoming gas and water. The reasons behind this being that by disconnecting you:
1. Get a realistic value for Zs
2. Reduce external parallel paths
3. Definitively test the earthing provisions within the circuit under test and
4. Conform to H&S by making the test safer.
Now this all makes perfect sense to me but so does the stance of the IET with regard to leaving them connected (as stated in GN3 the OSG ect and by my old college tutor and most practicing sparks I know) as in normal service if a fault occurs the conductors would be in place.
I'm interested to know what school of thought is the most popular out there?
1. Get a realistic value for Zs
2. Reduce external parallel paths
3. Definitively test the earthing provisions within the circuit under test and
4. Conform to H&S by making the test safer.
Now this all makes perfect sense to me but so does the stance of the IET with regard to leaving them connected (as stated in GN3 the OSG ect and by my old college tutor and most practicing sparks I know) as in normal service if a fault occurs the conductors would be in place.
I'm interested to know what school of thought is the most popular out there?