All responses based on the 2011 NEC.
If you live in New Jersey click here. All other states click here.
Please check with local, county and state officials as laws may vary.
Sizing motors here. Online motor calculator here. Online calculators here.
Could you give me some basic guidance? For example if I wanted to hire a lic electrician to do a complete re wire of the store would that all need to be in Bx? Hopefully not because Bx would cost me more than romex both in materials and labor. Any advice would be appreciated. Thanks again