Special Occupancies and Special Equipment
Why Special Articles Exist
Chapters 5 and 6 modify or supplement the general rules for occupancies and equipment with unusual hazards. The exam tests whether you recognize when a special article applies and how it overrides a general rule.
Health Care Facilities
Know the categories of care spaces and the essential electrical system. Critical and life-safety branches have specific requirements, and receptacles in patient care areas have special grounding and redundant-ground rules. A common trap is applying dwelling GFCI rules to patient care areas without checking the health care article.
Places of Assembly and Commercial Cooking
Assembly occupancies have emergency lighting and exit requirements. Commercial cooking equipment has hood and duct rules, including the requirement that electrical equipment be suitable for the environment.
Hazardous (Classified) Locations
Class I (gases/vapors), Class II (dusts), and Class III (fibers) with divisions or zones determine the permitted wiring methods. Intrinsically safe systems, explosionproof equipment, and sealing requirements are frequent topics. The trap: assuming ordinary equipment is acceptable because it is enclosed.
Worked Example
A question describes a receptacle in a patient care area. Answer: it must comply with the health care facility article, which requires special grounding and often hospital-grade receptacles-not the ordinary dwelling rules.