How many trainees per job site can work under the supervision of a licensed technician?

The appropriate number of trainees allowed to work under the supervision of a licensed technician is three. This regulation helps ensure adequate oversight and training, allowing licensed technicians to provide proper instructions and mentorship to trainees. By maintaining a specific ratio, the quality of training is enhanced, as the supervisor can dedicate sufficient time and focus to each trainee. This structure aids in developing competent professionals in the field, ensuring safety and adherence to best practices.

While other options exceed this number, having too many trainees could dilute the effectiveness of supervision and training, potentially leading to inadequate learning experiences or safety concerns in electrical access control environments.