Guide to the National electrical code
Updated to include all the changes required by the 1993 National Electrical Code, this guide explains the Code in detail with references to each specific Code artical. Covers services, feeders, and branch circuits; general design calculations; calculations for dwellings; circuit design for commercial and industrial occupancies; and more. For electrical inspectors, master electricians, journeyman electricians, electrical designers and engineers.
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PART IWIRING DESIGN CALCULATIONS
General Design Calculations
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12-kilowatt 20 amperes 20-ampere circuits air conditioner ampereO Application of Demand Application Rule Code apply Article bonding jumper branch circuits branch-circuit protective device cable capacitor Chapter circuit breaker circuit conductors Class clothes dryer Code rules Code table computed conductor ampacity connected load continuous load demand factor demand load disconnecting means duplex receptacles dwelling unit E.ception electric range enclosure equipment grounding conductor feeder circuit feeder load feeder or service feet full-load current fuses grounding electrode conductor horsepower inches Installation Rules kilovolt-amperes kilowatts lighting load locations maximum metal conduit minimum nameplate National Electrical Code neutral load occupancies optional calculation overcurrent device overcurrent protective device panelboard phase power factor Quiz Closed-Book raceway receptacle outlet Rule Code Ref service conductors service equipment service-entrance conductors single-phase small appliance specified switch THHN three-phase THW copper conductors total load transformer type THW copper ungrounded volt-amperes voltage volts watts wiring methods wiring system