CALC: Conduit Capacity Calculator

[MountainDon]

Ever wondered how to calculate the conduit size for a particular number of wires of a given size? Below are a couple of useful links. The first to an online calculator, the second to a chart so you can practise your own math skills.

This is not a be-all / end-all answer to the question. There are other factors that must be accounted for according to the NEC. For example, at a certain point the number of cables will cause a de-rating factor to be applied. This is due to heat build up from the electrical flow and non circulating air. Anyhow this is a place to start if you're wondering.

Conduit Calculator

Conduit Capacity Chart

[bisam]

Try this link also

http://www.adc.com/productsandservices/productsolutions/truenet/conduitcalcentry.jsp