UL 2158-2021 pdf download

UL 2158-2021 pdf download.Electric Clothes Dryers.
3.6 APPLIANCE, STATIONARY – any appliance that is intended to be fastened in place or located in a dedicated space. 3.7 APPLIANCE, WALL-INSERT – an appliance intended to be mounted permanently in a wall or other vertical surface of a building or cabinet. 3.8 AUTOMATIC – an appliance is considered to be automatically controlled if one or more of the following condition applies: a) repeated starting of the appliance, beyond one complete predetermined cycle of operation, to the point where some form of limit switch opens the circuit, is independent of any manual control; b) during any single predetermined cycle of operation, the motor is caused to stop and restart one or more times; c) upon energizing the appliance, the initial starting of the motor can be intentionally delayed beyond normal, conventional starting; or d) during any single predetermined cycle of operation, automatic changing of the mechanical load can reduce the motor speed to re-establish starting-winding connections to the supply circuit. 3.9 BAFFLE – a paddle inside the drum that lifts and tumbles clothes. 3.10 BARRIER – a partition for the insulation or isolation of electric circuits, for the isolation of electric arcs, or for the isolation of moving parts or hot surfaces. In this respect, a barrier can serve as a portion of an enclosure and as a functional part. 3.11 BUILT-IN APPLIANCE – a stationary appliance that is constructed to be permanently installed in a cabinet or wall. 3.12 CIRCUIT, LOW-VOLTAGE – A circuit having limited voltage and energy capacity supplied by: a) a primary battery having an output of 30 V or less; b) a Class 2 transformer; or c) a Class 2 power supply. Note 1: A circuit that is derived from a circuit that exceeds 30 V by connecting resistance or impedance, or both, in series with the supply circuit to limit the voltage and current, is not considered to be a low-voltage circuit. Note 2: The term “low voltage” as used in this clause relates to “extra low-voltage” in Canada.
3.16 CONTROL, PROTECTIVE – Control, the operation of which is intended to prevent the risk of electric shock, fire, or injury to persons during normal or abnormal operation of the appliance. Note: During the evaluation of the protective control, the protective functions are verified under normal and single-fault conditions of the control. 3.17 COOL DOWN PERIOD – Final part of the tumble dryer cycle where the drum is continuously rotated with reduced power to the heating element and with air circulation in order to reduce the possibility of spontaneous combustion of the clothes load. Note: Continuous rotation does not mean rotation in same direction if the intended operation is to reverse direction in normal use. 3.18 CURRENT CARRYING PARTS – Parts carrying current during normal or abnormal operation in line voltage circuits. Note: With respect to separation of circuits, Clause 20.3, this term refers to parts in both low-voltage and line-voltage circuits. 3.19 ELECTRICAL CONNECTION – The physical interface between two points in a circuit such as spade terminals, pin terminals, micro switch contacts, relay contacts, timer contacts, crimped connections, and connections that are welded or soldered. 3.20 ENCLOSURE – A material used to: a) render inaccessible, by itself or in conjunction with acceptable enclosure barriers and supplementary enclosures, any or all uninsulated current-carrying parts, internal wiring, or electrical components not having their own enclosures; b) reduce the likelihood of propagation of ignition due to electrical disturbances occurring within; or c) both (a) and (b). 3.21 ENCLOSURE BARRIER – A material used to reduce the size of an opening in an enclosure that: a) will not permit the entrance of a 19.1 mm diameter rod; and b) does not comply with Clause 7.2(a)(1) or (2). A polymeric enclosure barrier is to be evaluated as a functional polymeric part. 3.22 ENCLOSURE, SUPPLEMENTARY – A material used to reduce the size of an opening in an enclosure that: a) will permit the entrance of a 19.1 mm UL 2158-2021 pdf download.