Electical Contractor

Mike and Jennifer Striegel had hardly started their Memorial Day trip last year when lightning ripped through their Oklahoma home.

In the 2002 and previous editions of the National Electrical Code, the metal frame of a building or structure was required to be used as a grounding electrode when the metal of the building or structure was effectively grounded.

Article 110 Requirements for Electrical Installations Article 210 Branch Circuits Article 230 Services Article 240 Overcurrent Protection Article 300 Wiring Methods Article 342 Intermediate Metal Conduit: Type IMC Article 352 Rigid Nonmetallic Conduit: Type RNC Article 408 Switchboards and Panelboar

Ground-fault circuit interrupter (GFCI) protection for personnel or a similar protection technique has been in the National Electrical Code (NEC) since 1962 with specific reference to GFCI and its definition found in the 1968 NEC.

Article 100 Definitions Article 210 Branch Circuits Article 240 Overcurrent Protection Article 250 Grounding Article 310 Conductors for General Wiring Article 422 Appliances Article 680 Swimming Pools, Fountains, and Similar Installations Derating Parallel Conductors Q: I installed a 400-ampere, 4-w

Isolated ground receptacles are installed for the purpose of reducing electromagnetic interference on the grounded conductor.

ARTICLE 314 C OUTLET, DEVICE, PULL AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND MANHOLES

Article 210 Branch Circuits Article 240 Overcurrent Protection Article 250 Grounding Article 310 Conductors for General Wiring Article 430 Motors, Motor Circuits and Controllers Branch-circuit size for motor load Q: I have to install a 11/2 horsepower, single-phase, 120V motor with a nameplate full

NEC’s conditional requirements have evolved There are several conditions under which the National Electrical Code requires or permits conductors to be identified by the color of their insulation.