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IEC voltage ratings for cables

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TMD

TMD

Electrical
Joined
Nov 8, 2001
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88
Can anyone tell me, or direct me to info on, IEC cable voltage ratings? I've seen IEC cables rated 6/10(12) kV. What do these numbers refer to? And how does it relate to the North American 100%/133% ratings? The first number*SQRT(3) equals the second. But what is the number in ()? And how does this apply to single core cables?

 
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