UL 507-2020 pdf free download.Electric Fans.
2.2.25 WALL-INSERT FAN — An intake or exhaust fan permanently attached in a wall without a sleeve.
2.2.26 WHOLE HOUSE FAN — A fan mounted on the attic-side of a ceiling, typically centrally located in a hallway. The fan is usually concealed behind a ceiling grill that opens and closes automatically. The fan is used to cool an entire house by drawing cooler outside air through open windows in the house and exhausting the hot room air through the attic to the building exterior.
2.2.27 WINDOW-MOUNTED FAN — A window fan or a box fan intended for installation in a window.
2.3 Additional terms
2.3.1 AIR DISTRIBUTION SYSTEM — For the purpose of determining smoke developed requirements for non-metallic enclosures and other parts of appliances covered by this Standard, an air distribution system is defined as a continuous passageway for the transmission of air that does not vent directly to the outdoors, For example, a building having several fans inter-connected with air ducts before venting to the outdoors.
2.3.2 APPLIANCE COUPLER — A single-outlet, female contact device that is attached to a flexible cord as part of a detachable power supply cord to be connected to an inlet.
2.3.3 ASKAREL — A generic term for a group of nonflammable synthetic chlorinated hydrocarbons used as electrical insulating media. Askarels of various compositional types are used. Under arcing conditions the gases produced, while consisting predominantly of noncombustible hydrogen chloride, can include varying amounts of combustible gases depending upon the askarel type.
2.3.4 BRANCH CIRCUIT, INDIVIDUAL — A branch circuit that supplies only one utilization equipment.
2.3.5 CABINET — That part of a unit that encloses insulated wiring, electrical enclosures, moving parts, motors, or enclosed electrical parts.
2.3.6 CONVENIENCE RECEPTACLE — Receptacle intended for the connection of an independent appliance or product.
2.3.7 COOKING AREA — An area in close proximity (as defined in Figure 80.1) to a stove, range, or oven, where fumes, grease laden air, or the like may be present.
2.3.8 ELECTRONICALLY PROTECTED MOTOR – A motor that relies upon an electronic circuit to prevent overheating of the motor. The motor is defined as the combination of the motor cod and the associated control and/or power supply that is required for proper motor operation.
2.3.9 ENCLOSURE — That part of the product that:
a) Renders inaccessible all or any parts of the fan that present a risk of electric shock or injury to persons due to total or partial collapse with a resulting reduction of spacings, loosening or displacement of parts, or other serious defects; or
b) Retards propagation of flame initiated by electrical disturbances occurring within.
2.3.10 INLET — A male contact device that is mounted on a fan to provide an Integral blade configuration for the connection of an appliance coupler.UL 507 pdf download.