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SEE HERE!
http://www.iee.org/Publish/WireRegs/DPC/DPC_Introduction.pdf
In this introduction document to the DPC of 17th Ed. are proposals:
to scrap mechanical protection outside safe zones, in favour of RCD protection.
Up the IR lower limit to 1MOhm.
Changes in bathrooms: Z3 no longer defined
Each circuit must be RCD protected
Supp bond not required providing main bonding carried out in accordance with Ch. 41 (presumably Ch 41 of new book...??)
S/O other than SELV and 60742 allowed "3m horizontally beyond the boundary of Z1"
Measurement of FLI: consideration of increase of resistance with increase of temp.
Doesn't say anything about scrapping rings, though. BOO!!
http://www.iee.org/Publish/WireRegs/DPC/DPC_Introduction.pdf
In this introduction document to the DPC of 17th Ed. are proposals:
to scrap mechanical protection outside safe zones, in favour of RCD protection.
Up the IR lower limit to 1MOhm.
Changes in bathrooms: Z3 no longer defined
Each circuit must be RCD protected
Supp bond not required providing main bonding carried out in accordance with Ch. 41 (presumably Ch 41 of new book...??)
S/O other than SELV and 60742 allowed "3m horizontally beyond the boundary of Z1"
Measurement of FLI: consideration of increase of resistance with increase of temp.
Doesn't say anything about scrapping rings, though. BOO!!