Derating Factors

[R32]

Could someone explain what is involved when you have numerous correction factors

I have - ambient temp = 0.79 Thermal insulation = 0.88 grouping = 0.52 and a design current of 14.8A

Thanks

 

[telectrix]

It = 14.8/ ( 0.79 x 0.88 x 0.52) = 40.94 A so look up the correct size and type of cable that has a tabulated ccc > 41A

 

[R32]

Thank you. In this case I guess Cc = 1

 

[RJP1]

could someone tell me where i could find derating factors in the regs book , thanks

 

[Paul.M]

Old thread and now closed.