Some states require a low voltage certification, some actually require an Electrician's license. Z-man is right at the minimum you will need liability and workman's comp, some areas also require a continuing performance bond. Unfortunately most need to be paid in full upfront whci makes it very difficult for startups with limited funding. Depending on the size of the contract you may have to work with your "associates" through the first job then get yourself squared away, make sure you stay on top of your paperwork particularly change orders

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