Electric wiring Insurance requirements 98 Electric engineering 73 Electric wiring, Interior 72 Installation 60 Electric apparatus and appliances 54 Electric equipment 53 Standards 49 Safety measures 46 Electric currents 29 Grounding 27 Electrical engineering 22 Commercial buildings 19 Buildings 18 Charts, diagrams, etc 18 Handbooks, manuals, etc 17 Mathematics 16 Safety regulations 16 Electric cables 15 Aids and devices 14 Teaching 14 Equipment and supplies 13 Design and construction 12 Inspection 12 Law and legislation 10 Electric circuits 8 Studying and teaching 8 Vocational education 8 Electric wire 7 Local area networks (Computer networks) 7