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<blockquote data-quote="Rob_the_rich" data-source="post: 456073" data-attributes="member: 8419"><p>Further to my post above, just spoke with bg nexus tech. They say that it is not necessarily the CSA which is important but more the surface area of the outside surface, as electrons prefer to travel along the surface of a conductor, one of the reasons why stranded wires can carry more current, the csa might be the same but the surface area is much higher. In this case the csa of the steel is 6mm sq but the surface is 14mm. By comparison a 6mm sq copper cable has a circumference of 8.7mm.</p><p></p><p>I know that the required csa calculated by the adiabatic equation would normally be less than the actual csa of the cpc.</p><p></p><p>But I still think that there is not much wiggle room in the design. BG nexus seem happy with it though and have not had any problems in the 12 years they have been making them.</p></blockquote><p></p>
[QUOTE="Rob_the_rich, post: 456073, member: 8419"] Further to my post above, just spoke with bg nexus tech. They say that it is not necessarily the CSA which is important but more the surface area of the outside surface, as electrons prefer to travel along the surface of a conductor, one of the reasons why stranded wires can carry more current, the csa might be the same but the surface area is much higher. In this case the csa of the steel is 6mm sq but the surface is 14mm. By comparison a 6mm sq copper cable has a circumference of 8.7mm. I know that the required csa calculated by the adiabatic equation would normally be less than the actual csa of the cpc. But I still think that there is not much wiggle room in the design. BG nexus seem happy with it though and have not had any problems in the 12 years they have been making them. [/QUOTE]
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