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Hi fellow Electrical practitioner. I had encounter this N2XCH cables and the like for a European project. As observed, There's this size descried as i.e N2XCH 4x25/16 mmsq. where 16mmsq is a concentric copper conductor. My question is. What is the purpose of this Concentric copper conductor in...

Hi to all guys who are working with IEC and BS standards during design stages. can you guys share if what is the counterpart of the consideration of NFPA rule on lock rotor current during Circuit breaker sizing of firepumps? Basically that is approx. 6xFLC. On the few of my previous projects...