Re: cable size & material vs current capacity

Home Electrical Engineering Forum General Discussion cable size & material vs current capacity Re: cable size & material vs current capacity

#12052
electricalexpert65
Participant

Unfortunately, there is no short cut formulae for calculating the current rating of cables. May be you will be able to calculate the DC Current rating of cables with respect to the cross sectional area fairly linearly, as the DC resistance would vary linearly with the cross section. But, in AC the resistance is affected by SKin & Proximity Effect and also reactances play a rule. Reactances do not vary in linear proportion with the cross section. So, best is to follow the manufacturer's rating tables.