UL 183-2020 pdf free download.Manufactured Wiring Systems.
2.7 ENCLOSURE — A housing which provides a degree of protection against contacting live parts (i.e.. connector, conductors, and contacts). The enclosures are constructed of metal, polymeric material, or hybrid (combination of metal and polymer).
2.8 ENCLOSURE, ENVIRONMENTAL — The portion or portions of a device intended to provide a degree of protection to the contacts, blades, terminals, conductors, and other live parts of the device and of any adjoining devices or components comprising a complete protective system against outdoor conditions, both when the device is unmated and when it is fully connected to its intended mating device.
2.9 FITTING — A means of securing conduit, cable, or raceway to an enclosure or box.
2.10 INSULATION, BASIC — The insulation necessary for the intended functioning of the product and for basic protection against the risk of electric shock.
2.11 INSULATION, SUPPLEMENTARY — An independent insulation provided in addition to the basic insulation to reduce the risk of electric shock in case of breakdown of the basic insulation.
2.12 LIMITED POWER SOURCE (LPS)— A limited power source is as specified in the Standard for Information Technology Equipment — Safety — Part 1: General Requirements, UL 60950-1. and shall comply with the requirements of UL 60950.1.
2.13 LOW-VOLTAGE CIRCUIT — A circuit involving a potential of not more than 30 volts dc or ac mis (42.4 volts ac peak).
2.14 MANUFACTURED WIRING SYSTEM CONNECTOR — A device consisting of an electrical and mechanical enclosure, multi-pole electrical contacts and provided in either a male or female locking configuration for connection to a like configured connector.
2.15 MULTI-POLE SPLICING WIRE CONNECTOR — An insulated multi-pole mating or non-mating connector intended for factory wiring or field wiring contained in an outlet box, junction box, or within an equipment endosure. Used to connect two or more branch-circuit conductors.
2.16 RACEWAY — A completely enclosed channel intended specifically for holding and routing wiring
and providing separation of:
a) Power and lighting circuits; and
b) Power-limited or communication circuits.
2.17 RISK OF ELECTRIC SHOCK — A risk of electric shock is considered to exist in any accessible connective part of a system if a potential greater than 42.4 volts peak (30 volts rms) exists, and the available current is more than 5 milliamperes (7.07 mA peak) through a 1500-ohm resistor connected between:
a) The part and other accessible connective parts; or b) Between the part and ground.
2.18 RISK OF FIRE — A risk of fire is considered to exist in any branch-circuit-connected component part or assembly. In addition, risk of a fire is considered to exist in a component part or assembly if the power supply for such a part or assembly is capable of delivering more than 15 watts into an external resistor connected between the point in question and any return to the supply. A power supply not capable of delivering more than 15 watts as previously mentioned, is considered to be energy limited.UL 183 pdf download.