Preface This is the second edition of CAN/CSA-C22.2 No. 60079-30-1, Explosive atmospheres - Part 30-1: Electrical resistance trace heating - General and testing requirements, which is an adoption, with Canadian deviations, of the identically titled IEC/IEEE (International Electrotechnical Commission/Institute of Electrical and Electronics Engineers) Standard 60079-30-1 (first edition, 2015-09). It supersedes the previous edition published in 2014 as CAN/CSA-C22.2 No. 60079-30-1 (adopted IEC 60079-30-1:2007). It is one in a series of Standards issued by CSA Group under Part II of the Canadian Electrical Code. At the time of publication, IEC/IEEE 60079-30-1:2015 is available from IEC and IEEE in English only. CSA Group will publish the French version when it becomes available from IEC and IEEE. For brevity, this Standard will be referred to as \"CAN/CSA-C22.2 No. 60079-30-1\" throughout. This Standard is intended to be used in conjunction with CAN/CSA-C22.2 No. 60079-0, Explosive atmospheres - Part 0: Equipment - General requirements. In addition to the changes made in the IEC/IEEE Standard, this edition includes a) the addition of Canadian bonding requirements; and b) the removal of the requirement to comply with CSA C22.2 No. 130 but adding specific requirements from CSA C22.2 No. 130 to ensure correlation with the Canadian Electrical Code, Part I. This Standard is considered suitable for use for conformity assessment within the stated scope of the Standard. Scope This part of IEC 60079 specifies general and testing requirements for electrical resistance trace heaters for application in explosive atmospheres with the exclusion of those for EPL Ga and Da. This Standard covers trace heaters that comprise either factory or field (work-site) assembled units, and which may be series trace heaters, parallel trace heaters, trace heater pads, or trace heater panels that have been assembled and/or terminated in accordance with the manufacturer\'s instructions. This Standard also includes requirements for termination assemblies and control methods used with trace heating systems. The explosive atmospheres referred to in this standard are those defined in IEC 60079-10-1 and IEC 60079-10-2. Annexes D and E outline the application of this standard for those users applying the Division method of area classification. This Standard supplements and modifies the general requirements of IEC 60079-0, except as indicated in Table 1. Where a requirement of this standard conflicts with a requirement of IEC 60079-0, the requirement of this standard takes precedence.