UL 73:2004 pdf download Motor-Operated Appliances
1 Scope
11 These requirements cover motor-operated appliances to be employed in accordance with theNational Electrical Code.NFPA 70.
1.2 These requirements also cover small utilization appliances, such as vibrators in which motion of anoperating part is produced by electrical means.
1.3 These requirements do not cover appliances rated more than 600 V; nor do they cover appliancesinvolving universal motors rated more than 250 V.
1.4 These requirements do not cover equipment intended particularly for the control of electric motorsseparator motors; nor electric clocks, fans, clothes dryers, washing machines, hair dryers, tools, wastedisposers, dishwashers, office appliances and business equipment, refrigerators, air conditioners, vendingand amusement machines, hair clippers and shavers, snow movers, automotive and garage equipmentor other motor-operated appliances that are covered by individual requirements.
1.5 An appliance that utilizes some other source of energy, such as gas or steam, in addition to electricenergy will be investigated under these requirements and under such additional requirements as areapplicable to the appliance under consideration.
2 Glossary
2.1 For the purpose of this standard the following definitions apply.
2.2 AUTOMATICALLY CONTROLLED APPLIANCE – An appliance is considered to be automaticallycontrolled if:
a) The repeated starting of the appliance, beyond one complete predetermined cycle ofoperation to the point where some form of limit switch opens the circuit, is independent of anymanual control:
b) During any single predetermined cycle of operation, the motor is caused to stop and restartone or more times;
c) Upon energizing the appliance, the initial starting of the motor may be intentionally delayedbeyond normal, conventional starting; or
d) During any single predetermined cycle of operation, automatic changing of the mechanicalload may reduce the motor speed sufficiently to reestablish starting-winding connections to thesupply circuit.
2.3FIXED APPLIANCE – Any equipment or appliance that is provided with a facitily to be fastened orotherwise secured in a specific location.
2.3 revised February 20, 2008
2.4 LINE-VOLTAGE CIRCUIT – A circuit involving a potential of not more than 600 V and havingcircuit characteristics in excess of those of a low-voltage circuit.
2.5 LOW-VOLTAGE CIRCUIT – A circuit involving a peak open-circuit potential of not more than 42.4V supplied by a primary battery, by a Class 2 transformer, or by a combination of a transformer and afixed impedance that as a unit, complies with all performance requirements for a Class 2 transformer. Acircuit derived from a line-voltage circuit by connecting a resistance in series with the supply circuit as ameans of limiting the voltage and current, is not considered to be a low voltage circuit.
2.6 PORTABLE APPLIANCE – An appliance that is easily carried or moved from one place to anotherin normal use.
2.6 revised February 20, 2008
2.7 REMOTELY CONTROLLED APPLIANCE – An appliance that is out of sight of the operator who isat the starting device.
2.8 STATIONARY APPLIANCE – An appliance that is not easily moved from one place to another innormal use or is located in a dedicated space, but is not fastened in place.
28 revised February 20，2008
3 Components
3.1 Except as indicated in 3.2, a component of an appliance covered by this standard shall comply withthe requirements for that component. See Appendix A for a list of standards covering componentsgenerally used in the appliances covered by this standard.
3.2 A component need not comply with a specific requirement that:
a) Involves a feature or characteristic not needed in the application of the component in theappliance covered by this standard. or