UL 698A:2016 free download

UL 698A:2016 free download Industrial Control Panels Relating to Hazardous (Classified) Locations
2.1 Any undated reference to a code or standard appearing in the requirements of this standard shall beinterpreted as referring to the latest edition of that code or standard.
3Units of Measurement
3.1 Values stated without parentheses are the requirement.Values in parentheses are explanatory orapproximate information.
4Glossary
4.1 For the purpose of this Standard,the following definitions apply.4.2BARRIER – The device that provides the intrinsically safe circuit.
4.3 BARRIER CONTROL DRAWING – A drawing or other document provided by the manufacturer ofeach intrinsically safe barrier used in the panel that details the allowed interconnections to each barrier.4.4FIELD WIRING – Conductors to be installed by others to connect the industrial control panel tosources of supply, control devices, and loads.
4.5 INTRINSICALLY SAFE CIRCUIT – A circuit in which any spark or thermal effect, produced eithernormally or under specified fault conditions, is incapable of causing ignition of a mixture of flammable orcombustible material in air in the mixture’s most easily ignitable concentration.
4.6 INTRINSICALLY SAFE INTERNAL WIRING – The wiring between the terminal blocks for fieldwiring of intrinsically safe circuits and the barrier.
4.7 PANEL CONTROL DRAWING – A drawing or other document provided by the manufacturer of thepanel that details each barrier within the panel and the connections to the intrinsically safe electricalequipment in the field.
4.8 PARTITION – A metallic or non-metallic material used to maintain required separation betweenintrinsically safe and non-intrinsically safe equipment and wiring.
4.9 SIMPLE APPARATUS – An electrical component or combination of components of simpleconstruction with well defined electrical parameters that does not generate more than 1.5 volts,0.1amperes, and 25 milliwatts or a passive component that does not dissipate more than 1.3 watts and iscompatible with the intrinsic safety of the circuit which is used. Examples of simple apparatus includepassive components such as LED’s, resistors, RTD’s, and switches and sources of generated energysuch as thermocouples and photocells which do not generate more than 1.5 volts, 0.1 amperes and 25milliwatts.
4.10 Um – The maximum voltage (rms, ac, or dc) that can be applied to a non-intrinsically safeconnection facilities of the barrier without invalidating the type of protection.
5 Application of Requirements
5.1 The industrial control panels covered by this Standard shall be of the enclosed-type and shall comply with the applicable requirements in the Standard for Industrial Control Panels, UL 508A.
5.2 When conflicting requirements exist, the requirements of this Standard shall supersede the requirements of the Standard for Industrial Control Panels, UL 508A. CONSTRUCTION
6 Barriers
6.1 Barriers shall comply with the following requirements based on the intended area:
a) For Division 1 hazardous (classified) locations: the Standard for Intrinsically Safe Apparatus and Associated Apparatus for Use in Class I, II, and III, Division 1, Hazardous (Classified) Locations, UL 913.
b) For Zone 0 and Zone 1 hazardous (classified) locations: the Standard for Explosive Atmospheres – Part 11: Equipment Protection by Intrinsic Safety ″i″, UL 60079-11.
c) For Zone 20 and Zone 21 hazardous (classified) locations: the Standard for Electrical Apparatus for Use in Zone 20, Zone 21 and Zone 22 Hazardous (Classified) Locations – Protection by Intrinsic Safety ″iD″, ISA-61241-11 (12.10.04)-2006.