You could have but the results in the end are the same. Anytime you are dealing with people in a commercial setting you need to have all your ducks in a row. AND all the required inspections. This way you are covered if something does happen. In this case your question for us has been answered and it is an easy enough job to do, but you are sure to need an inspection before operating. But if you have done everything required by the code then the inspection should go well. Electricity is dangerous so there are no shortcuts allowed. This also pertains to personal only use, shortcuts can kill you.