August 8, 2025

Overview
A leading North American food manufacturer faced a critical safety challenge during the relocation of equipment from their existing facility to their main production plant. The major electrical modifications required a comprehensive arc flash hazard analysis to comply with CSA Z462 safety standards. With 131 electrical equipment pieces requiring evaluation and worker safety at stake, the company turned to Grantek for expert electrical engineering services. The project demanded precise analysis to protect maintenance personnel from potentially fatal arc flash incidents while ensuring full regulatory compliance during the facility integration.

Challenges
The relocation project presented multiple complex engineering challenges that required immediate attention. In Canada, CSA Z462 “Workplace Electrical Safety” standard mandates comprehensive arc flash hazard analyses for electrical safety compliance. According to Article 4.3.5.1(b) of CSA Z462, “The analysis must be updated whenever a major modification or renovation takes place.” Additionally, CSA Z462 Section 4.3.5.5 requires that analyses “be reviewed periodically, at intervals not to exceed five years, to account for changes in the electrical distribution system that could affect the result of the analysis.” The company’s health and safety policies, based on these CSA Z462 standards, required an updated arc flash hazard analysis due to the significant electrical modifications. The plant integration involved sophisticated electrical distribution systems across multiple transformers, each feeding numerous production lines including automated filling systems, packaging equipment, and process control panels.

Grantek’s preliminary assessment revealed 81 electrical panels that were installed or modified during the relocation, but further investigation identified 131 total equipment pieces requiring analysis. The complexity increased due to the interconnected nature of the electrical systems, with bus ducts, motor control centers, and variable frequency drives all requiring precise calculations for incident energy levels and protection boundaries. Each piece of equipment needed accurate arc flash labels displaying incident energy levels, working distances, and required personal protective equipment (PPE) to prevent second-degree burns and potential fatalities.
The project also faced technical challenges including updated CSA Z462 standards that eliminated certain categories and required new labeling approaches. Additionally, some existing circuit breakers were found to be improperly rated for the 575V system, creating immediate safety concerns that needed urgent resolution. The engineering team had to coordinate data collection while production continued, ensuring minimal disruption to the manufacturer’s operations while maintaining the highest safety standards throughout the analysis process.

Solutions
Grantek delivered a comprehensive arc flash hazard analysis using advanced engineering software and proven calculation methods. The team conducted detailed field data collection, power system modeling, and short-circuit studies to determine precise incident energy levels for each electrical component. Professional engineers created custom arc flash labels displaying energy levels, protection boundaries, and required PPE for 92 critical equipment pieces.

The solution included immediate safety recommendations, including replacement of improperly rated circuit breakers and standardized labeling procedures. Grantek provided detailed documentation stamped by registered professional engineers, ensuring full CSA Z462 compliance. The project established clear safety protocols that protect maintenance personnel during energized electrical work, significantly reducing the risk of arc flash incidents while maintaining operational efficiency during the ongoing facility integration. The manufacturer achieved full regulatory compliance with enhanced worker safety protocols, proper equipment labeling, and clear guidelines for safe electrical maintenance procedures across their integrated production facility.