Arc Flash Evaluations

A three-phase evaluation of arc-flash hazards

Our technicians perform electrical arc flash studies and analyses as per Canadian Workplace Electrical Safety Standard CSA Z462 and the Canadian Electrical Code (CEC C22.1)

What is an arc flash?

Arc flash occurs when a rapid burst of electricity is discharged through the air, with the air itself conducting the energy. Arc flash results from an arcing fault between a phase bus bar and another phase bus bar, neutral or a ground. Arc faults are generally limited to systems where the bus voltage is in excess of 120 volts.

An arc fault is similar to the arc obtained during electric welding. The fault must be manually started, when something creates a path of conduction, or due to a failure (such as a breakdown in insulation.)

Three-phase arc flash evaluation process

Phase 1: Data collection

A Wismer & Rawlings technician visits your facility and collects the electrical data necessary to prepare an arc-flash hazard analysis of your facility. Data will be collected on the electrical system, from the electric utility service point through the electrical system to the equipment where the arc-flash hazard risk is located.

Phase 2: Engineering analysis

Our technician will analyze the data collected, or data provided by the facility. The engineering analysis includes:

  • a short-circuit analysis
  • protective device coordination analysis
  • arc-flash hazard analysis
  • a report on the available short-circuit current at each buss evaluated

Phase 3: Hazard analysis report, with warning labels for equipment

The engineering analysis results are presented in a detailed report. Warning labels are provided for all electrical equipment evaluated.