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Quick 2391 question

Discuss Quick 2391 question in the Periodic Inspection Reporting & Certification area at ElectriciansForums.net

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Regular EF Member
Hi, I'm abit stuck on a question..

Zs=Ze+(R1+R2)x12xL\1000 What does the 12 represent?

Many thanks


Scouser and Proud of It
Respected Member
is it 1.2 (not 12) to allow for temperature correction? just reread and it looks like confusion with Zs and volt drop calcs.
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