NFPA 51B

Related terms

Arc-Fault Circuit Interrupter (AFCI)

A circuit protection device required by NFPA 70 (US NEC) in specified residential circuits, designed to detect the signature current waveform of...

Conveyor Belt Slip Fire

An industrial fire caused when a stationary conveyor belt is driven against a rotating roller, generating frictional heat concentrated at the contact...

Frank-Kamenetskii Model

A mathematical model (1939) for predicting the critical geometry above which a self-heating material will undergo thermal runaway to ignition, based on...

Glowing Connection

A loose or corroded electrical connection with elevated contact resistance that generates localised heat by Joule heating without increasing circuit current sufficiently...

Ground Current

The spread of lightning strike current outward through the soil from the grounded strike point, generating potential differences that can damage electrical...

Lithium-Ion Thermal Runaway

A self-reinforcing exothermic reaction within a lithium-ion cell, triggered by mechanical damage, overcharge, or elevated temperature, that propagates from cell to cell...

Reduced Ignition Propensity (RIP)

A cigarette design standard, adopted in the US (2010), EU (2011), Australia (2010), and Canada (2005), requiring cigarettes to self-extinguish when placed...

Side Flash

A secondary lightning discharge from the primary lightning channel to a nearby conductor, caused by potential difference between the strike channel and...

Smouldering Combustion

A flameless, slow-propagating oxidative combustion front that can sustain itself for 30 minutes to several hours within a porous, combustible material (upholstery,...

Explained in

• Ignition Pathways: Electrical, Smoking, Lightning, SpontaneousThe National Fire Protection Association's Standard for Fire Prevention During Welding, Cutting, and Other Hot Work, specifying minimum precautions including c...