With reference Solutions Electrical I use and would recommend this software to anyone. The software complies with many standards. It is extremely easy to use i could do 10 cable calculations in the time you could 1 with Amtech. No it is not as pretty as Amtech, there again at a third of the cost. what is the most important issue when using electrical design software I would have thought accuracy would be a great place to start. You can see the software features and capabilities at
http://squidoo.com/cablesize