UL 541-2020 pdf free download

UL 541-2020 pdf free download.Refrigerated Vending Machines.
5.7 CABINET — The part of the equipment that provides physical protection to insulated wiring, enclosures, moving parts, motors, enclosed electrical parts, refrigeration tubing or other parts that may cause injury to persons.
5.7.1 CAPACITOR. CLASS Y — Capacitor or resistor-capacitor unit of a type suitable for use in situations where failure of the capacitor could lead to danger of electric shock. (Examples would include capacitors connected across the primary and secondary circuits where electrical isolation is required to prevent an electric shock or between hazardous live parts and accessible parts.)
5.8 CAPILLARY TUBE — Device made of tubing with an outer diameter of less than 3116 in. (4.7 mm) and used to reduce the pressure of the refrigerant between the condenser and evaporator. It also regulates the refrigerant flow.
5.9 CELL — The basic photovoltaic device that generates electricity when exposed to sunlight.
5.10 CHARGE CONTROLLER — Equipment that controls dc voltage or dc current, or both, used to charge a battery.
5.11 COMPON ENT — A device or fabricated part of the vender covered by the scope of a safety standard dedicated to that purpose. If incorporated in a vender, a product that is otherwise typically field installed (e. g. luminaire) is considered to be a component. Unless otherwise specified, materials that compose a device or fabricated part, such as aluminum or copper, are not considered components. Generally, components are incomplete in construction features or restricted in performance capabilities, Such components are intended for use only under specific, limited conditions, such as certain temperatures not exceeding specified limits.
5.12 CONTROL, OPERATING — A device or assembly of devices, the operation of which starts or regulates the end product during normal operation. For example, a thermostat, the failure of which a thermal cutout/limiter or another layer of protection would mitigate the potential risk of fire, electric shock, or injury to persons is considered an operating control. Operating controls are also referred to as “regulating controls.” Appendix A specifies control functions that are not considered to result in a risk fire, electrical shock, or injury to persons.
5.13 CONTROL, PROTECTIVE — A device or assembly of devices, the operation of which is intended to reduce the risk of electric shock, fire or injury to persons during normal and reasonably anticipated abnormal operation of the appliance. For example, a thermal cutout/limiter, or any other control/circuit relied upon for normal and abnormal conditions, is considered a protective control. Protective controls are also referred to as 9imiting controls” or safety controls and are investigated under normal and single-fault conditions. Appendix A specifies control functions that are considered to result in a risk fire, electrical shock, or injury to persons. Such functions may also be known as dsafety critical.”UL 541-2020 pdf free download.