It supersedes the previous editions published in and In addition to its initial source, it includes significant revisions by CSA Group. The NFPA, holder of the copyright in this edition, takes no responsibility for any portion thereof. This Standard specifies requirements for and provides guidance on safety management systems, safe work procedures, and selection of personal protective equipment and other safety devices for persons exposed to hazards associated with energized electrical equipment.
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It supersedes the previous editions published in and In addition to its initial source, it includes significant revisions by CSA Group. The NFPA, holder of the copyright in this edition, takes no responsibility for any portion thereof.
This Standard specifies requirements for and provides guidance on safety management systems, safe work procedures, and selection of personal protective equipment and other safety devices for persons exposed to hazards associated with energized electrical equipment. In addition, this Standard sets out criteria for the identification and training of qualified electrical workers and for determination of hazardous work to be performed only by those qualified individuals.
In this edition, where a major change or addition to the previous edition of this Standard has been made, the clause, table, or figure affected is identified by the symbol delta? Users of this Standard are advised that the change markers in the text are not intended to be all-inclusive and are provided as a convenience only; such markers cannot constitute a comprehensive guide to the revisions made to this Standard.
Care must therefore be taken not to rely on the change markers to determine the current requirements of this Standard. As always, users of this Standard must consider the entire Standard.
The following is an overview of the major revisions to the edition: a The edition of CSA Z reflects a major shift towards risk assessment. In support of this, four new definitions were added to Clause 3: hazard, hazardous, risk, and risk assessment.
The content in the Standard was revised to ensure that these terms are used consistently and in accordance with the definitions. See Clause 4. This was done to provide a dimension for the restricted approach boundary for Vac single-phase systems and Vac three-phase systems.
The Clause prohibits using an incident energy analysis to specify an arc flash PPE category in Table 5. An informational note directs those that perform an incident energy analysis to Tables H. See Clauses 4. The owner of the electrical equipment has been made responsible for the documentation, installation, and maintenance of the field-marked label.
Table 4A was split into two tables: Table 4A, Arc-flash hazard identification for alternating current ac and direct current dc systems, and Table 4B, Arc-flash PPE categories for alternating current ac systems. Table 4A is now used solely to identify when arc flash PPE is likely to be required. The PPE categories identified in Table 4A and Table 4B are based on specific listed minimum working distance, maximum fault current, and maximum fault clearing time parameters.
Tables 4B and 4C continue to identify an arc flash boundary distance for each type of equipment. When the arc flash boundary is greater than the limited approach boundary, barricades cannot be placed closer than the arc flash boundary. See Clause 5. See Clause 6. Scope 1. In addition, users of this Standard should always refer to provincial, territorial, and federal safety regulations that have jurisdiction over their work facility, contract job site, or profession.
Annexes A to W do not specify requirements and are included for information only. The values given in parentheses are for information and comparison only. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative mandatory or informative non-mandatory to define their application.
Electrical safety: Changes in the 2018 NFPA 70E/CSA Z462 standard
The first step of the process consists of trying to eliminate, at the source, the danger, if the residual risk is not tolerable, then it should be managed by substitution and engineering controls actions, finally, administrative controls tools, awareness and PPE are considered as last resort risk reduction measures. Equivalent to an access to machine danger zone, tasks on electrical installation should be performed after locking out the equipment, however, if a lockout procedure is impractical then, a risk analysis should be undertaken to reduce and evaluate the risk. In this blog, only the main changes will be treated Main changes Definitions The definition of arc flash hazard has been refined and the link to the table To determine when arc flash PPE are needed, the table allows to draw a line if the equipment has been well maintained and well installed, but instead of talking about the required anti-arc flash PPE, it focused on the probability that an arc flash occurs risk analysis. The table has been simplified and is now in single page. The concept of safe maneuver with the 5 points was maintained but a 6th point about operating the equipment according to the manufacturer instructions was added, especially when the equipment is complex ex: transfer switch.
ARC FLASH STANDARDS
La Norme CSA Z462 disponible en français
Norme CSA Z462-15 : les principales nouveautés