Published:
13 January 2023
Category:
Q&A
ASK AN EXPERT! Our expert from SELECT answers the question from a Voltimum user.
QUESTION:
Which is the best calculation to use for checking the readings on R1 RN end to end on ring main so I know it’s not measuring high?
ANSWER:
The value will be approximately one-quarter of the resistance of the line and neutral conductor loop resistances, i.e. (R1+Rn)/4
Bob Cairney, Stuart McKelvie, Keith Hagan, Neil Sim and Mark McLaughlin
Experts on all aspects of Electrical Installation Scottish Building Standards
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