I have tried NEC Quick - It works quite well for the most used 2011 NEC look up tables including wire ampacity, conduit fill motor FLA, grounding and more.
https://itunes.apple.com/us/app/a-nec-quick-reference/id474647605?mt=8
It runs $1.99 at the present time.
Southwire also has a nice, and FREE, voltage drop calculator.
https://itunes.apple.com/us/app/southwire-voltage-drop-calculator/id440338420?mt=8
Chuck Arthur November 15 2012, 12:48 am EST
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