37 Construction of electric mains; construction-assembly services in relation to electric mains; installation and start-up services in relation to circuit breakers, reclosers, apparatus and equipment for distributing and controlling electricity, measuring, testing and control devices and equipment in relation to electricity, electrical equipment for consumer circuit installations, vacuum circuit breakers, automatic circuit reclosers, control module and control boxes for managing and monitoring vacuum circuit breakers and automatic circuit reclosers; servicing, maintaining and repairing of circuit breakers and reclosers, apparatus and equipment for distributing and controlling electricity, measuring, testing and control devices and equipment in relation to electricity, electrical equipment for consumer circuit installations, vacuum circuit breakers, automatic circuit reclosers, control module and control boxes for managing and monitoring vacuum circuit breakers and automatic circuit reclosers; cable system technical support services; technical assistance services in relation to electrical equipment; servicing, maintenance and repair of electrical equipment; assembly of parts and appliances in relation to electric mains including electrical and electronic components