UL 1676-2017 pdf free download

UL 1676-2017 pdf free download.Conductive-Path and Discharge-Path Resistors for Use in Radio-, Video-, or Television-Type Appliances.
3.3.1 CIREEPAGE 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 stipply circuit and a terminal or lead provided for the connection of an external antenna or cable-system input.
3.2 relocated as 3.4 Octobec 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.
4A Creepage Distances and Clearances for Conductive Path Resistors
4A. 1 With reference to 4.2, a conductive-path resistor that is used in a Class I product, as specified in
3.2.1, shall have the following internal and external creepage distances and clearances between end-lead termination assemblies:
a) A minimum of 1.5 mm for voltages in the range of 105 — 130 V, and
b) A minimum of 3.0 mm for voltages in the range of 220 — 250 V.
4A.2 With reference to 4.2, a conductive-path resistor that is used in a Class II product, as specified in
3.2.2. shall have the following internal and external creepage distances and clearances between end-lead termination assemblies:
a) A minimum of 3.0 mm for voltages in the range of 105 — 130 V. and
b) A minimum of 6.0 mm for voltages in the range of 220 — 250 V.
MAt uLoio on
4A.3 Creepage distances and clearances between end-lead termination assemblies and dead-metal
parts or current-carrying parts shall comply with the spacing requirements of the end-product standard.
PERFORMANCE
5 Discharge-Path Resistor Tests
5.1 Resistance test
5.1.1 The initial resistance of 20 as-received, discharge-path resistors Is to be measured. The initial resistance of each resistor:
a) Shall be 480 kc to 12 Mu for a resistor to be used in a 125 V or less circuit, or
b) Shall be 960 k to 12 MQ for a resistor to be used in a 126 — 250 V circuit.UL 1676-2017 pdf free download.