Electical Contractor

Whenever energized electrical equipment is being examined, serviced, maintained or adjusted in any way, there is always the potential for an electrical explosion to occur, resulting in injury to the electrical worker and damage to the equipment.

Please refer to Electrical Contractor magazine for illsutrations. Required Outlets Provisions stipulating the placement of receptacle outlets are covered in 210.52 through 210.63.

CODE CITATIONS Article 100—Definitions Article 210—Branch Circuits Article 230—Services Article 695—Fire Pumps Article 725—Class 1, Class 2, and Class 3 Remote-Control, Signaling, and Power-Limited Circuits Article 760—Fire Alarm Systems Article 770—Optical Fiber Cables and Raceways Article 800—Comm

• Please refer to ELECTRICAL CONTRACTOR magazine for referenced illustrations. 210.8(A) Dwelling Units Receptacles installed in certain locations must have ground-fault circuit-interrupter (GFCI) protection for personnel.

We are often left in the air about exact meanings of grounding problems. This article simplifies the differences between the grounded and grounding conductor. The two aspects of grounding are system grounding and equipment grounding. This article concerns the former.

CODE CITATIONS Article 100—Definitions Article 225—Outside Branch Circuits and Feeders Article 230—Services Article 250—Grounding Article 310—Conductors for General Wiring Article 320—Armored Cable: Type AC Article 430—Motors, Motor Circuits, and Controllers Article 445—Generators Article 518—Places

CODE CITATIONS Article 110—Requirements for Electrical Installations Article 210—Branch Circuits Article 230—Services Article 250—Grounding Article 408—Switchboards and Panelboards Article 430—Motors, Motor Circuits, and Controllers Article 695—Fire Pumps

Please see January issue of Electrical Contracor for referenced figures. 210.8(A) Dwelling Units

CODE CITATIONS Article 110—Requirements for Electrical Installations Article 230—Services Article 240—Overcurrent Protection Article 310—Conductors for General Wiring Article 410—Lighting Fixtures, Lampholders, Lamps, and Receptacles Article 424—Fixed Electric Space-Heating Equipment