What defines an electrically safe working condition in electrical practice?

An electrically safe working condition is defined by a situation where electrical equipment is de-energized, tested, and maintained to ensure worker safety. Achieving an electrically safe working environment involves several important steps: first, minimizing the risk of electrical shock or arc flash by ensuring that all equipment is turned off and properly isolated from any source of electrical energy. This de-energization process is crucial because it allows workers to perform maintenance or repairs without the hazard of electric shock.

Additionally, testing of the equipment is performed to confirm that it is indeed de-energized and to verify that there are no residual voltages present that could pose a risk. This testing usually involves using appropriate testing devices that comply with safety standards. Regular maintenance ensures the integrity of electrical systems and identifies potential issues that could lead to unsafe conditions.

The other options do not encompass the full requirements for achieving an electrically safe working condition. Regular inspection and cleaning, while important for general maintenance, do not ensure equipment is de-energized or tested for safety before work begins. Using lightweight electrical equipment or keeping equipment powered on for testing contradicts safety principles as powered equipment presents an inherent risk. Thus, option A accurately captures the necessary protocols for establishing electrically safe working conditions.