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Work on installing electrical outlets. Electrician man installing wire on jobsite Electricity and electrical maintenance service, Engineer hand checking electric current voltage at circuit breaker terminal and cable wiring in main power distribution board. Electrical engineers test electrical installations and wiring on protective relays, measuring them with a multimeter. The man is repairing the switchboard voltage with automatic switches. Electrician installing electric cable wires of fuse switch box. electrician tools and electrical equipment on wiring diagram Group of colored electrical cables - studio shot. Blue electric lighting, abstract electrical background electrical engineering drawings Electrician stripping insulation from wire for installation an electrical outlet conceptual energy electric spark between two cables