Final answer:
Article 500 of the NEC® (NFPA 70) establishes the Class and Division requirements for electrical equipment used in hazardous locations with fire or explosion hazards.
Step-by-step explanation:
The correct answer is option Engineering.
Article 500 of the NEC® (NFPA 70) establishes the Class and Division requirements for electrical equipment used in locations where fire or explosion hazards may exist due to flammable gases or vapors, flammable liquids, combustible dust, or ignitable fibers or flyings.
These requirements ensure that the electrical equipment is designed and installed to minimize the risk of fire or explosion in hazardous environments.
For example, in a Class I, Division 1 location where there are flammable gases or vapors present in the atmosphere under normal operating conditions, the electrical equipment must be designed and installed to contain any potential ignition source. This may include features like seals, explosion-proof enclosures, or purging systems.
The correct answer is option Engineering. The National Electrical Code (NEC), under Article 500, addresses the classification and installation requirements for electrical equipment and wiring in locations where there may be fire or explosion hazards due to the presence of flammable gases, vapors, flammable liquids, combustible dust, or ignitable fibers or flyings.
This classification is crucial for ensuring electrical safety in hazardous locations by specifying appropriate systems and devices to prevent these risks.
Electrical safety systems and devices such as circuit breakers, fuses, and the three-wire system, which includes live/hot, neutral, and earth/ground wires, are designed to prevent thermal and shock hazards.
The NFPA 704 Hazard Identification System provides further safety information through a hazard diamond that identifies the potential risks, including fire, health, and reactivity hazards, as well as other special considerations that are rated on a scale from 0 to 4 indicating the severity of the hazard.