Are you looking for an electrical contractor in Edmonton? Get in touch with Sierra Electrical Ltd. for electrical system wiring, installation, repair and service. Are you looking for an electrical contractor in Edmonton? Get in touch with Sierra Electrical Ltd. for electrical system wiring, installation, repair and service. Are you looking for an electrical contractor in Edmonton? Get in touch with Sierra Electrical Ltd. for electrical system wiring, installation, repair and service. Are you looking for an electrical contractor in Edmonton? Get in touch with Sierra Electrical Ltd. for electrical system wiring, installation, repair and service.