Our Voltimum Experts answer your questions on a daily basis in our Technical Expertise area. This one, about the 17th Edition and the connection of multiwire, fine wire and very fine wire conductors, is answered by SELECT:
Answer: This would probably refer to some sort of data cable having a very small diameter (less than 0.5mm) where great care must be taken when terminating the conductor. You could have a look at the Codes of Practice for voice and data systems, which start with BS EN 50173 - XX.
I am assuming here that multiwire is a flexible cable with conductors that are made up of many strands of wire. Fine wire will be small strands of wire, and very fine wire will be very small strands of wire. Cable manufacturers will be the best to contact in order to obtain definitions of actual sizes. The Regulation mainly addresses the need for proper termination and, perhaps, tinning of the copper wires.
To see many more Q & A in Voltimum UK's Experts Area, please click on the link:
www.voltimum.co.uk/consult.php?universe=consult.index.questions