UL 2161-2016 pdf download
UL 2161-2016 pdf download.Neon Transformers and Power Supplies.
C) At least 3-112 to 5 threads shall be provided when the threads are not formed through the entire length of the hole, or at least 5 threads when the threads are formed through the length of the hole.
14.1.5 A field-wiring compartment provided as part of a neon supply shall be located so that the connections are accessible for inspection without disturbing wiring connections after the neon supply is installed as intended.
14.1.6 The attachment means of a field-wiring compartment shall not result in incidental rotation of the compartment.
14.1.7 A neon supply that incorporates one or more of the following supply-circuit components in which polarity is to be maintained shall have one lead or terminal identified for the connection of a grounded (neutral or common) conductor of the supply circuit:
a) Single pole switch.
b) Overcurrent device,
C) Single pole interrupt component.
ci) Single pole overtemperature component, or
e) Any other component or construction feature that relies on maintaining polarity.
14.1.8 When a field-wiring compartment is provided on a neon supply, the input and output field-wiring leads and terminals shall not occupy the same compartment.
Exception: When the input field-wiring leads and terminals are located at one end of a neon supply, and the output field-wiring leads and terminals are located at the opposite end, they are not prohibited from being located in the same neon supply enclosure when a conduit connection means is provided at each end of the enclosure.
14.2 Supply terminals
14.2.1 A field-wiring terminal shall be of the pressure-wire connector or wire-binding screw type and shall be capable of being used for connection to solid 10— 14 AWG (5.3 mm2 — 2,1 mm2) conductors.
Exception: A field-wiring terminal that complies with the Standard for Wire Connectors, UL 486A -4868, is not required to be further investigated.
14.2.2 A pressure-type wire terminal shall comply with the Standard for Equipment Wiring Terminals for Use with Aluminum and/or Copper Conductors, UL 486E,
14.2.3 A wire-binding screw terminal shall either comply with the Standard for Terminal Blocks. I..JL 1059, or:
a) Shall be No. 8 (4.2 mm) diameter or larger where the head of the screw and a baseplate shall cover at least three-quarters of the conductor as illustrated in Figure 14.1 and
b) The base plate shall have a tapped hole of metal no less than 0.030•in (0.76-mm) thick and shall not have fewer than two full threads in the metal
14.3 Supply leads
14.3.1 A field-wiring lead shall not be smaller than 18 AWG (0.82 mm2).
14.3.2 The tree length of a field-wiring lead shall not be less than 6 in (15.2 cm). Free length Is measured from the point of entry of the lead into the wiring compartment to the tree end of the lead.
14.3.3 The insulation of a lead intended tot the connection of a grounded supply conductor (neutral or common) shall be white or gray and readily distinguishable from other supply leads.
14.3.4 The insulation of a lead intended for the connection of an ungrounded supply conductor (hot) shall be any color other than white, gray, green, or green with yellow stnpe.
14.3.5 A strain relief shall be provided on field-wiring leads so that stress on a lead is not transmitted to the electrical connection inside a neon supply. The acceptability of the strain-relief means shall be determined by the Strain and Push-Back Relief Test. Section 35.
14.4 Cord- and plug-connected supplies
14.4.1 A neon supply that is not provided with means tot permanent connection to a source of supply shall be povided with either a connector and detachable power supply cord or non-detachable power supply cord. The connector and supply cord shall be of the grounding (three-conductor) type.
Exception: A neon supply with no accessible dead-metal parts and evaluated only as a component to, use in an end product that is determined to comply with the Standard for Electric Signs, UL 48. is not required to be provided wth a supply cord of the grounding 4pe, when marked in accordance with 48.5.
14.4.2 A power supply cord shall be minimum 18 AWG (0.82 mm2) and be of Type SP-2, Type SPE-2, Type SPT.2, or heavier usage.
14.4.3 A flexible supply cord shall be minimum 6 ft (1.83 iii) and maximum 15 ft (4.57 m) in length as measured from the point where the cord emerges from a neon supply, or after any strain-relief means provided, to the point where the cord enters an attachment plug.
