UL 1676 2017 pdf download – Conductive-Path and Discharge-Path Resistors for Use in Radio-, Video-, or Television-Type Appliances.
2 General 2.1 Units of measurement 2.1.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 2.2 Undated references 2.2.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. 3 Glossary 3.1 For the purpose of this Standard, the following definitions apply. 3.2 Relocated as 3.4 October 16, 2001. 3.2.1 CLASS I PRODUCT – A construction in which protection provided to reduce the risk of electric shock does not rely on basic insulation only, but which includes an additional means of protection. The additional means of protection provides for the connection of accessible current-carrying parts to the grounding conductor of the equipment so the accessible parts do not present a risk of electric shock due to breakdown of the basic insulation. 3.2.2 CLASS II PRODUCT – A construction in which protection provided to reduce the risk of electric shock does not rely on basic insulation only, but in which additional means of protection, such as double insulation or reinforced insulation, are provided when no provision for grounding is provided. 3.2.3 CLEARANCE – The shortest distance through air between two conductive parts. 3.3 CONDUCTIVE-PATH RESISTOR – A resistor that provides a conductive path between live parts and accessible conductive parts of a radio-, video-, or television-type device.
3.3.1 CREEPAGE DISTANCE – The shortest distance along the surface of an insulating material between two conductive parts. 3.4 DISCHARGE-PATH RESISTOR – A resistor that provides a discharge path between the supply circuit and a terminal or lead provided for the connection of an external antenna or cable-system input. 3.2 relocated as 3.4 October 16, 2001 3.5 INSULATION, BASIC – Insulation applied to live parts to provide basic protection to reduce the risk of electric shock. 3.6 INSULATION, DOUBLE – Insulation comprised of both basic insulation and supplementary insulation. 3.7 INSULATION, REINFORCED – Single insulation applied to live parts which provides a degree of protection to reduce the risk of electric shock equivalent to double insulation. The insulation is not required to be one homogeneous piece. Insulation comprised of several layers that are not tested singly as supplementary or basic insulation is included. 3.8 INSULATION, SUPPLEMENTARY – Independent insulation applied in addition to basic insulation in order to provide protection to reduce the risk of electric shock in the event of breakdown of the basic insulation. CONSTRUCTION 4 General 4.1 A discharge-path resistor shall be constructed such that the resistor complies with Sections 5, 7 – 9, 10, and 11. 4.2 A conductive-path resistor shall be constructed such that the resistor complies with Sections 6, 10, and 11. A conductive-path resistor intended for use in equipment that complies with the Standard for Audio/Video and Musical Instrument Apparatus for Household, Commercial, and Similar General Use, UL 6500, shall also comply with Section 4A.