CSA Z462: Canada Finally Has Its Own Electrical Safety Standard

In 2007, there were 472 known workplace injuries and nine fatalities connected to electricity across Canada; in 2006, there were 567 injuries and 20 fatalities. Of course, OHS laws require employers to take measures to protect workers from electrical hazards. However, the danger is so serious that many companies have chosen to go beyond legal requirements and comply with more stringent voluntary electrical safety standards. For years, Canadian employers have relied on the US National Fire Protection Association (NFPA) 70E electrical safety standard for guidance on protecting workers from various electrical hazards. But that’s all changed. On Feb. 13, 2009, the Canadian Standards Association (CSA) finally published its long-awaited electrical safety standard. CSA Z462 Workplace Electrical Safety is designed to help Canadian employers assess electrical hazards and design safer workplaces around electrical power systems and machinery in accordance with the Canada Electrical Code and other Canadian requirements. Here’s an overview of CSA Z462.

THE STANDARD

What It Covers: CSA Z462 addresses the electrical safety requirements needed to safeguard workers during activities such as the installation, operation, maintenance and demolition of electric conductors, electric equipment, signaling and communications conductors and equipment, and raceways.

How It’s Organized: The standard is divided into three “clauses” or sections:

• Safety-related work practices, including safety management systems, selection of PPE and other safety devices and procedures for identifying hazardous electrical equipment;
• Safety-related maintenance requirements for electrical equipment and installations in workplaces; and
• Safety requirements for special equipment.

In addition, there’s an extensive annex to CSA Z462 that’s included for informational purposes only. The annex provides guidance material and examples to help users implement an effective safety management system.

What It Says: CSA Z462 covers the following locations:

• Public and private premises, including buildings, structures, mobile homes, recreational vehicles and floating buildings;
• Yards, lots, parking lots, carnivals and industrial substations;
• Installations of conductors and equipment that connect to the supply of electricity; and
• Installations used by the electric utility, such as office buildings, warehouses, garages, machine shops and recreational buildings, that aren’t an integral part of a generating plant, substation or control centre.

The standard excludes various electrical installation, such as installations in ships; installations of communications equipment under the exclusive control of communications utilities located outdoors or in building spaces used exclusively for such installations; and certain installations under the exclusive control of an electric utility.

The standard also sets requirements for the recognition of “qualified” electrical workers. CSA Z462 sets out the requirements for the recognition of “qualified” electrical workers—that is, personnel considered qualified to perform certain electrical work. Recognition of such workers is a fundamental component of the standard. For example, the standard specifies hazard zones around energized electrical equipment and only qualified workers are permitted to work within these zones.

ANALYSIS

CSA Z462 is based on NFPA 70E. So if you’ve already developed an electrical safety management system for your company’s workplace based on the US standard, adapting that system to the new Canadian standard may not be so difficult. What gives CSA Z462 its Canadian character is that it’s intended to be used with Canadian requirements such as the Canadian Electrical Code Parts 1 and 2 and other related workplace electrical safety standards, such as CSA M421 (Use of electricity in mines) and CSA Z460 (Control of hazardous energy—Lockout and other methods).

But remember: CSA Z462 is a voluntary standard. So compliance with it isn’t mandatory unless and until it’s adopted by Canadian jurisdictions in their OHS and other electrical safety laws. So employers should always refer first to those laws that apply to their workplace, job site or profession. If those laws don’t cover specific electrical hazards, such as arc flash, you should refer to CSA Z462 for guidance on how to protect workers from those hazards. Why? Even the standard isn’t adopted as law, it’s  likely that it will be accepted as a best practice. Thus, compliance with CSA Z462’s requirements could help your company prove that it exercised due diligence in trying to protect workers from electrical hazards.