UL 507-2020 pdf download – Electric Fans.
2.3.12 OPERATING CONTROL – A device or circuit, the operation of which, starts or regulates the appliance during normal operation. Note: Examples of operating controls include motor controls not relied upon for overtemperature protection under normal and abnormal operating conditions. 2.3.13 OTHER SPACE USED FOR ENVIRONMENTAL AIR – Space used for environmental air-handling purposes other than ducts and plenums. It does not include habitable rooms or areas of buildings, the prime purpose of which is not air handling. The space over a hung ceiling used for environmental air handling purposes is an example of the type of other space to which this section applies. 2.3.14 OUTLET BOX – As used in this standard, the term “outlet box” includes an outlet box or any other supporting system, usually field supplied, intended to enclose splices and wiring devices or to support a fan. 2.3.15 PROTECTIVE CONTROL – A device or circuit, the operation of which is intended to prevent a hazardous situation during abnormal operation of the machine or equipment. 2.3.16 RISK OF ELECTRIC SHOCK – A risk of electric shock exists at any part when: a) The potential between the part and earth ground or any other accessible part is more than 30 V rms (42.4 V peak); and b) The continuous current flow through a 1500 ohm resistor connected across the potential exceeds 0.5 mA. 2.3.17 SINGLE-OPERATION DEVICE – A device that incorporates a bimetal that is calibrated to open the motor circuit upon reaching a certain temperature and is resettable only by cooling to minus 35° C (minus 31°F), or lower. 2.3.18 SPECIAL-USE RECEPTACLE – Receptacle intended for the connection of a specific component of the end-product appliance. 2.3.19 TOTALLY ENCLOSED MOTOR – A motor that is enclosed to prevent the free exchange of air between the inside and outside of the enclosure for windings but not sufficiently enclosed to be airtight.
4 Undated References 4.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. 5 Application of Requirements 5.1 This standard is comprised of two parts. Part 1 consists of requirements that are to be applied to all products covered by UL 507 unless otherwise specified. Part 2 consists of requirements for specific product types. These requirements supplement or modify the requirements in Part 1. For each product type, the requirements unique to that construction are presented in the same format as Part 1 (with headings for construction, performance, marking, and the like). A product’s construction and intended use may result in the application of more than one set of requirements in Part 2. (For example: a ceiling- suspended fan intended for use in an agricultural environment shall comply with the requirements in Part 1, the requirements for ceiling-suspended fans in Part 2, and the requirements for fans used in agricultural buildings in Part 2.) 5.2 With respect to the text in this Standard, a requirement that applies only to a specific type of appliance, such as an evaporative cooler or an air-filtering appliance, is so identified by a specific reference in that requirement to the type involved. Absence of such specific reference, or use of the term “appliance” or “fan”, indicates that the requirement applies to all appliances covered by this Standard unless the context indicates otherwise. 5.3 A household canopy- or hood-type unit, the electrical components of which are complete except for a fan or blower, may be investigated under the applicable requirements in this standard to determine whether the unit is acceptable for use with cooking equipment.