Title 30
SECTION 27.37
27.37 Tests to determine adequacy of safety devices for bulbs.
§ 27.37 Tests to determine adequacy of safety devices for bulbs.The glass envelope of bulbs with the filament incandescent at normal operating voltage shall be broken in flammable methane-air or natural gas-air mixtures in a gallery to determine that the safety device will prevent ignition of the flammable mixtures.