Clause D1, Annex D, IEC1010-1
This clause does imply that you can reduce C&C (ignore the entire
annex) provided certain conditions are met;
- Circuit is not mains
- All single fault tests in 4.4 do not result in hazard
- No hazard accessible after fault
Without this clause being present the whole of annex D would be
mandatory whenever invoked by the standard. I can't see any other
way to interpret it.
It may not help you very much though. If you reduce your C&Cs to
the point where they only meet the requirements of Basic
Insulation then clause 4.4.2.11 may demand that this Insulation
be short-circuited. (Failure of basic insulation is a Single
Fault).
Individual cases differ but obviously be very careful if you are
relying on fault testing to get you through. I would rather keep
my C&Cs within Annex D if function permits it.
Regards,
Trevor Haworth.
Product Approvals Manager
Design to Distribution Ltd
[email protected]
