CFI Electrical Systems & Fire Safety Flashcards

What fire hazard is specifically associated with aluminum wiring in residential buildings?

Answer: Oxidation causing loose connections that overheat and can ignite surrounding materials

Aluminum wiring oxidizes and expands/contracts at different rates than copper, causing connections to loosen over time, creating heat that can ignite surrounding materials.

What does NEC stand for?

Answer: National Electrical Code

The National Electrical Code (NEC), published by NFPA as NFPA 70, establishes the minimum safety standards for electrical installations throughout the US.

What is an 'overloaded circuit' condition?

Answer: A circuit carrying more current than its rated ampacity, generating damaging heat

An overloaded circuit carries current exceeding the rated ampacity of the wiring, generating heat that degrades insulation and can cause fires.

Where does the NEC require GFCI protection?

Answer: Bathrooms, kitchens, garages, outdoors, and other wet or damp locations

The NEC requires GFCI protection in all locations near water including bathrooms, kitchens, garages, outdoor areas, and other wet or damp locations.

What is 'thermal imaging' used for during electrical inspections?

Answer: Detecting hot spots in electrical panels and connections that indicate developing problems

Thermal imaging cameras detect heat signatures in electrical equipment, identifying overloaded circuits, loose connections, and failing components before fires occur.

What is the primary electrical fire hazard presented by improperly rated or failed space heaters?

Answer: Overloading circuits and igniting adjacent combustible materials from radiant heat

Improperly rated or failed space heaters can overload circuits and radiate sufficient heat to ignite adjacent combustible materials, making them a leading cause of residential fires.