NZ boosts arc flash safety but lacks federal testing rules

New Zealand is addressing electrical safety through enhanced protection requirements designed to mitigate risks from arc flash incidents.

Standards such as AS/NZS 4836:2023 stipulate that protective clothing for those working on or near exposed energised conductors must be suitable, well-fitted, fully body-covering, and in good condition. Despite these measures, a gap in federal regulation remains regarding the mandated frequency of testing or inspections related to arc flash hazards.

Arc flash incidents, although less frequently discussed than electrocution, impose serious risks within the electrical industry. According to WorkSafe New Zealand, the country experiences between two and four arc flash incidents annually. These events are not minor, as they can lead to severe burns or even fatal injuries.

One company has taken a progressive approach to counteract these risks by collaborating with Schneider Electric to conduct an Arc Flash Assessment at all their facilities. Through this assessment, a level 3 arc flash rating was identified in some of the switchboards.

Consequently, the company designed and installed an arc flash protection solution to mitigate the associated risks of potential arc flash incidents.

Schneider Electric implemented engineering controls to safeguard employees performing equipment maintenance, ensuring minimal disruption to daily operations.

The company's strategy included coordinating with stakeholders to execute the installation during a single shutdown, thereby maintaining operational continuity.

Arc flashes can precipitate explosive events, generating extreme temperatures and substantial threats to those managing affected systems. The only effective countermeasure against potential arc flashes is consistent monitoring, servicing, and maintenance of electrical equipment.