Which engineering control is specifically required for controlled areas where frequencies are below 30 MHz and electric burns are the primary hazard?

• A. Electric Shock or Burn Safety Equipment
• B. Personal Protective Equipment (PPE) Only
• C. Prior Coordination
• D. Flashing Lights/Audible Signals

Answer: (A)

Engineering controls focus on changing the environment or equipment to remove or reduce exposure to the hazard. In areas where electrical energy is present below 30 MHz, the primary risk is electric shock and resulting burns from contact with energized parts. The best engineering control is Electric Shock or Burn Safety Equipment, which provides physical protection and isolation to prevent direct contact or limit the energy that can reach a worker. This includes insulating barriers, properly rated protective gear and tools, safe enclosures, interlocks, and other devices that keep workers out of danger or reduce the chance of a current path forming.

PPE alone doesn’t reduce the hazard at the source, so it isn’t the appropriate engineering control. Prior coordination helps manage work but doesn’t inherently prevent exposure. Warning devices like flashing lights or audible signals alert workers but do not stop the hazard from causing harm.