UL-1564:2015 pdf free download – STANDARD FOR SAFETY Industrial Battery Chargers.
8 Assembly
8.1 An uninsulated live part shall be secured to the base or surface so that it is prevented from rotating or shifting in position as the result of normal stresses when such movement results in a reduction of spacings below the minimum acceptable values. See 24.1.1.
8.2 A component, such as a rectifier element, control switch, lampholder, attachment plug receptacle, or plug connector shall be mounted securely and shall be prevented from turning by means other than friction between surfaces, such as a properly applied lockwasher.
Exception No. 1: A switch need not be mounted as described if the following conditions are met:
a) The switch is a plunger or other type that does not tend to rotate when operated. A toggle switch is considered to be subject to forces that tend to turn the switch;
b) The means for mounting the switch makes it unlikely that operation of the switch will loosen it;
c) Spacings are not reduced below the minimum acceptable values if the switch rotates; and
d) Normal operation of the switch is by mechanical means rather than by direct contact by persons.
Exception No. 2. A lampholder of the type in which the lamp cannot be replaced, such as a sealed neon pilot or indicator light, if rotation cannot reduce spacings below the minimum acceptable value.
9 Protection Against Corrosion
9.1 Iron and steel parts shall be protected against corrosion by enameling, painting, galvanizing, plating, or an equivalent means.
Exception No. 1: Bearings, laminations, and other similar parts of iron or steel, such as washers and screws, do not need to be protected from corrosion.
Exception No. 2: A part the corrosion of which would not result in a risk of fire, electric shock, or injury to persons does not need to be protected from corrosion.
10 Supply Connections — Permanently-Connected Products
10.1 General
10.1.1 The provisions for the input connections to a product shall consist of either a means of permanent wiring connections as specified in this Section or a power supply cord in accordance with Supply Connections — Cord- and Plug-Connected Products, Section 11.
10.1.2 A product intended for permanent connection to the power supply shall have provision for the connection of a wiring system.
10.1.3 A knockout in a sheet-metal enclosure shall be secured and shall be removable without undue deformation of the enclosure.
10.1.4 A knockout shall be surrounded by a flat surface large enough to seat a conduit bushing or locknut of the appropriate size.
10.1.5 A field-wiring compartment in which power supply connections are to be made shall be located so that the connections may be readily inspected after the product is installed as intended.
10.1.6 A field-wiring compartment intended for connection of a wiring system shall be attached to the product so that it is prevented from turning.
10.1.7 A field-wiring compartment shall provide protection for wiring from sharp edges, including screw threads, burrs, fins, moving parts, and the like, that may abrade the insulation on conductors or otherwise damage the wiring.