What should technicians ensure when selecting wire gauge for electric heaters?

When selecting wire gauge for electric heaters, it is crucial for technicians to ensure that the wire can handle the required current. This consideration is vital because each wire gauge has a specific ampacity, which is the maximum amount of electric current a conductor or device can carry before sustaining immediate or progressive deterioration. Using a wire that cannot handle the required current can lead to overheating, potential insulation failure, and increased risk of fire hazards.

The selection process typically involves referencing the National Electrical Code (NEC) or local codes to determine the proper gauge size based on the expected load and length of the wire run. This ensures both safe operation and compliance with electrical standards. Other factors, such as environment and exposure conditions, are also important but primarily focus on ensuring the wire's capacity for current flow is of utmost concern.