Which level of technician is typically authorized to open high-voltage components according to OEM instructions?

• A. Level 1 technician
• B. A Level 2 or Level 3 technician
• C. Maintenance trainee
• D. Security personnel

Answer: (B)

Opening high-voltage components is dangerous because those parts store and can release large amounts of energy. OEM instructions specify who is permitted to access or open those components, and the usual practice is that only technicians with advanced HV training—Level 2 or Level 3—are authorized to perform that work. They learn how to safely isolate the high-voltage system, apply lockout/tagout, discharge capacitors, and use the proper PPE and insulated tools. This ensures the energy is safely removed and the system cannot re-energize during service. Level 1 technicians typically handle non-HV tasks and do not have the required procedures to safely access HV components. Maintenance trainees and security personnel generally lack the specific HV safety training and authorization necessary to open HV components, so they should not perform that task.