UL 2161-2016 pdf free download

UL 2161-2016 pdf free download.Neon Transformers and Power Supplies.
8.1 All uninsulated or insulated current-carrying parts operating at a voltage greater than 30 Vrms (42.4 Vpeak) shall be protected against the risk of contact in accordance with 8.4 by an accessibility barrier in accordance with 8.6 during normal use. maintenance, or servicing.
Exception: A neon supply is not required to have the coil, input, and output connections made inaccessible where identified as “Exposecf in Construction Type Designation. Table 1.1, when if is marked with the intended designation type as identified in Table 1.1.
8.2 Under conditions of normal use, uninsulated current-carrying parts of a cord-connected neon supply operating at a voltage greater than 30 Vrms (42.4 Vpeak) shall be guarded in accordance with 8.3 from contact by the straight metal strip specified in 8.5.
8.3 All uninsulated current-carrying parts of a cord-connected neon supply that result in ignition of combustible materials when shorted together shall be guarded from contact in accordance with 8.1 with the straight metal strip specified in 8.5, so that a short or arc is not capable of resulting in ignition of materials.
8.4 A current-carrying part is determined to be accessible when the articulate probe shown in Figure 8.1 is capable of contacting the part. The probe shall be applied to any depth that an opening permits and with a force not greater than 1 lbf (4.4 N). The probe shall be rotated or angled before, during, and after insertion through an opening to any position that is required to examine the neon supply. The probe shall be applied in any possible configuration and, when required, the configuration is to be changed after insertion through an opening.
8.5 A current-carrying part of a cord-connected neon supply is determined to be accessible when a
straight metal strip measuring 2-in (51-mm) long, 1/2-in (12.7-mm) wide, and 1116-in (1.6-mm) thick, is
capable of contacting the current-carrying part, when inserted into an opening with a force not greater than
1 lbf (4.4 N).
8.6 An accessibility barrier shall be constructed of one of the following materials:
a) Metal (ferrous, aluminum, brass, zinc, or copper), minimum 0.016-in (0.41-mm) thick;
b) Glass, porcelain, or ceramic, minimum 1/8-in (3.2-mm) thick;
C) Impregnated glass fiber sleeving minimum 0.01-in (0.25-mm) thick, that is rated for the temperature involved;
d) Vulcanized fiber, minimum 0.028-in (0.71-mm) thick;
e) A polymeric material that complies with 8.7; or
f) Mica sheet, minimum 0.016-in (0.406-mm) thick where framed by other material.UL 2161-2016 pdf free download.