What defines an Electrically Safe Condition (ESC)?

An Electrically Safe Condition (ESC) is specifically defined as a state in which electrical energy has been completely removed from conductors and equipment. This is crucial for ensuring the safety of personnel during maintenance and repair activities. Without electrical energy present, the risk of electrical shock or accidental energization is significantly minimized, allowing technicians to work safely on electrical equipment.

The other options, while related to operational efficiency and environmental conditions, do not accurately capture the definition of an ESC. Efficient power systems and proper humidity levels can contribute to overall safety and operational performance but do not directly indicate that electrical energy has been removed. Similarly, while verifying cooling systems is important for equipment performance and reliability, it does not pertain to ensuring an electrically safe condition. Therefore, option B directly aligns with the definition needed to establish a safe working environment when dealing with electrical systems.