I have just received my copy of IS 10101 2020 which is the Irish equivalent of BS7671 2018. It is over 760 pages so is a mighty tome indeed. My job requires me to be on top of both documents. You would imagine that would not be so difficult as both are effectively based on the 60364 series of CENELEC HDs. Yes there is much commonality but you would get the impression that the respective national technical committees have done their best to tear up any concept of harmony and have sought to be as different as they possibly can. That might be inevitable say with the U.K. and Romania but having such disparity between the U.K. and Ireland seems ridiculous.
What 7671 has as Parts, 10101 has as Chapters. Sections in one document are Clauses in the other. Testing RCDs in one is different to testing RCDs in the other. Zs for protective devices in 10101 has no Cmin to apply and measured Zs is a maximum of 2/3 tabulated. You need your maths cap on for 10101 when working out voltage drop as there are no voltage drop tables. You have to use the resistivity of copper adjusted for temperature and a given per metre reactance with the power factor of the load applied to each. None of this 70v stuff for EVs in 10101, just a stipulation that if connecting to a TN system it can only be TN-S. And so it goes on.
To give me something to do while imprisoned, I am going to chart the most blatant differences.
