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  1. F

    Max Zs

    Hi, i have a question im a bit stuck on at the moment, should probably know but my brain is mashed on it!!!  Max Zs- i believe the figure stated in fig 41.3 of BS 7671 is @ 70 degrees ambient temp?   - how to find correction factors for ambient temp for 20 degrees? also, if i have the R1+ R2...
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