San Francisco based "Chasov Electrical, Voice & Data" electrical contractor company. California Contractors License #785830. Bonded & Insured. Chasov Electrical, Voice & Data has been providing quality Residential and Commercial electrical service to the San Francisco Bay Area for over 12 years. With 20 years of industry experience Michael Chasov started Chasov Electrical Company in 2000. Our licensed electricians are dedicated to working with you to implement a solution that meets your needs.