Discuss How to test a circuits in steel conduit as the cpc in the UK Electrical Forum area at ElectriciansForums.net
See what it said prior to amendment 2 as mine is in the loft.Cheers, Spin, I have the earlier 16th ed regs books and the last brown book (2004) of that edition and I will if I can be bothered look that up.
Is this with intent of reducing Zs or a measure to reduce danger to exposed parts.Section 419 deals with achieving fault protection through the likes of supplementry bonding if ADS can’t be achieved by 411.3.2
Supplementary bonding to the location between accessible exposed conductive parts and extraneous parts and circuits is one method.So Ian, are you saying in effect that SB can be used to lower a Zs to achieve disconnection times ?, I do have the 18th regs book but I am just being lazy
To limit the touch voltage to below 50 vIs this with intent of reducing Zs or a measure to reduce danger to exposed parts.
This is my view.To limit the touch voltage to below 50 v
Yes I do see your point.This is my view.
I can’t even remember the 16th that wellThere are basically two reasons for SB, the special locations part is to do with reducing Ut to keep it below 50V, medical locations below 25V, back in the 16th agricultural locations required Ut below 25V as well I recall, but I don't recall now which specific amd, or if it ever changed in that entire edition.
The other part is to achieve disconnection times and was to reduce Zs by default, the regs are worded --- backward in a lot of cases.
A ductor tester should be used to check the condition of the conduit joints. Test current of 100A should be fine.
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