IEEE P844.3/C22.2 293.3/D1-2018 Draft Standard for Impedance Heating of Pipelines and Equipment - General@ Testing@ Marking@ and Documentation Requirements
IEEE - The Institute of Electrical and Electronics Engineers@ Inc.
Scope
This standard applies to general@ testing@ marking@ and documentation requirements for impedance heating systems for steel or steel alloy pipe or equipment@ rated up to and including 132 Vac. These heating system components are intended for installation in accordance with CSA C22.1@ Canadian Electrical Code@ Part I (CE Code); NFPA 70@ National Electrical Code? (NEC?) in the USA; or with any other national electrical installation code@ as applicable.1 This standard applies to impedance heating systems that are intended to be installed in ordinary and hazardous locations. The hazardous location installations are limited to 30 Vac and include the following: ?CIn Canada: Zone 2; Zone 22; or Class I@ Division 2; Class II@ Division 2; Class III@ Division 2 as described in CSA C22.1; and ?CIn the USA: Class I@ Zone 2; Zone 22; or Class I@ Division 2; Class II@ Division 2; Class III@ Division 2 as described in the NEC. This standard also applies to power connection points and control methods used with impedance heating systems. NOTE 1?? Requirements for certification of insulated impedance conductors with insulation temperature ratings above 105 ??may be considered under a special investigation by an accredited certification body. NOTE 2?? Information on isolation transformers@ power distribution@ and control components can be found in IEEE Std 844.4/CSA C293.4.2 Purpose This standard provides testing@ marking@ design@ and documentation requirements for impedance heating system components. Impedance heating systems that follow the component requirements as outlined here are intended to: a) Maintain design temperature; and b) Provide electrical@ thermal@ and mechanical durability and reliability. 1 National Electrical Code and NEC are both registered trademarks of the National Fire Protection Association@ Inc. 2 Information on references can be found in Clause 2.