Without a clause, how can a client terminate a contract in California?

I am an electrician working in California, and I had a contract with a client. In the middle of the job, they terminated the contract without sending a notice. They allege that because there was no clause in the contract, they could terminate me for any reason and without notice.

Electricians please: Two issues, on a ceiling fan the remote receiver circuit board is fried?

on the same circuit a potentiometer that controls the light "dimness" is fried. What would cause both the circuit board on the ceiling fan receiver to fry(i opened it, it is literally black inside) and the control dimmer to fry. An "electrician" sent his helper over to wire the house and I want to know what he might have done wrong.

Are there pendant lights that do not require electrical wiring?

I want to hang 2 pendant lights over my kitchen sink, but I don't want to have to have an electrician come in. Wanting to do some minor, less expensive changes to my kitchen, and noticed more light is needed over the sink area. Any ideas or am I going to have to call an electrician in?