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You can check if an electrician is licensed in New York by using the online license verification search tool offered by the New York State Education Department. The database is updated daily and gives you the option of searching by license number, contractor name, or the name of the business.

This depends on how many outlets you have and the current status of your electrical system. The cost to ground an outlet clocks in at $75 to $480 per outlet, so multiply that by the number of outlets in your home to arrive at a rough estimate. However, this is for simple projects with no obvious issues with the system. Your final bill could vary widely from your calculations.

To avoid drilling into wire, you will need to trace your home's wiring using a stud finder, wire detector, circuit tracer, or voltage finder. Since locating wires in your home can be difficult for some homeowners, hire a professional electrician with the experience and knowledge needed to safely handle electrical systems before drilling into any walls in your home.

Christmas lights typically do not need to be grounded like electrical circuits in your home do. However, it's crucial to use outdoor outlets equipped with ground fault circuit interrupters (GFCIs) for added safety. GFCIs can help protect against electrical shocks and are recommended for outdoor electrical connections when using Christmas lights.