OP
Engineer54
Re: 95 mm 4 core cable, 30 m run, in ducting under buildings backed up by 200 amp fus
I really apologise if I am coming across like Im trying to be a smart arse.... I dont mean to be... its just the way I phrase things sometimes.... just as the missus!
I would love for you to really explain it to me in my examples. I can same money here, but I cant give a reason why to my bosses as they think, like me, you apply it to both.
It does state in Table 4C1: Rating factors for one circuit or one multicore cable or a group of circuits, or a group of multicore cables.....
No problem Spoon.
All these terms relate to ''circuits or groups of circuits'' not to cables making up a ''single'' circuit''!! Ask your bosses why they don't apply a grouping factor to a trefoil run cable, or to the lowly ring circuit. Both are fundamentally exactly the same situation, both have either individual conductors touching or cables touching. Like the parallel single circuit, the method of installation is the initial determining CCC factor.... Other factors may be applied, depending if and when appropriate. Grouping factors however will only apply, if there are more than one parallel single circuit being run in or on the same containment etc...
And that's as far as i'm going, until my post #119 has been answered.... lol!!