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You missed out Cmin factor.
Discuss Max Zs on certification in the UK Electrical Forum area at ElectriciansForums.net
I have found so many inconsistencies and mistakes in the on site guide that it can't be relied on. Take a look at the test and inspection sheets in the appendix section. Some of the values inserted are incorrect and the advice notes don't match the forms. I would always suggest that you use your experience and knowledge in any conundrum. In this case I would enter the 80% value as this is the worst case scenario in any instancePlease can people clarify what value they insert in the Max Zs field on certification.
I've always input 100%. Currently in disagreement with another person as they are specifying 80%.
Done my 2391 in 2008 and I was taught and told it's always 100% and it's down to the QS to interpret the results and ensure they fall with 80% allowing for correction factors.
Third argument is that in GN3 and OSG they specifically state 80% - however I always understood these to be quick reference pocket guides while on site.
In the mentioned publications and BBB the model forms show 100% in the compelte fields for examples. Secondly the small print at the bottom makes reference to the Publication and values in Chapter 41 aka BBB and 100% values.
Your thoughts please people
Reply to Max Zs on certification in the UK Electrical Forum area at ElectriciansForums.net
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