California requires a license, C7, for any job exceeding 700.00 in value. And they police it tightly. Licensed C7s are encouraged to drop a dime on any unlicensed contractors. The fine is steep and usually involves more money than the project was worth. A C7 I know was once turned in by another C7 who thought he was turning in an unlicensed contractor. I can understand the antipathy when you play by the rules and somebody takes your business from you. I don't have a C7 yet, but when I do cabling, it is undert the company of a licensed C7. He gets a hefty percentage but he carries the insurance too. Actually getting my C7 would take a weekend of study and then the test. Not a big deal.