## Cable Sizing - Derating factor

## Cable Sizing - Derating factor

(OP)

While calculating the derating factor we need to have the total no. of cables for finding group factor. Now to have the total no. of cables we need to have the derating factor. Please let me know how to proceed and which one shall be selected first. Thanx

## RE: Cable Sizing - Derating factor

Suppose you have one cable only, this gives you a derating factor.

Based on this derating factor, calculate the current carrying capacity of the cable (or theoretical CSA). If this is OK, you have your solution.

Otherwise, use two cables, and get the new derating factor. Calculate the current carrying capacity (or theoretical CSA). If this is OK, you have your solution.

Otherwise, use three cables, ....

It's repetitive, but it works !

Software programs are good at handling this.

Good luck,

Boris

## RE: Cable Sizing - Derating factor