What does the term "electrical work" refer to in the context of coal mine equipment?

The term "electrical work" in the context of coal mine equipment encompasses a comprehensive range of tasks related specifically to electrical systems. This includes the construction and installation of electrical infrastructure, which is critical for powering various equipment and systems used in mining operations.

Additionally, it involves testing and inspection to ensure that electrical systems are functioning correctly and safely. Maintenance is another crucial aspect, as it helps prevent equipment failures that could lead to safety hazards or operational downtime. Finally, repair tasks are vital when electrical components fail or require upgrading to comply with safety standards or improve efficiency.

Overall, option C accurately captures the full scope of activities categorized as electrical work in a coal mining environment, emphasizing the importance of both practical implementation and ongoing oversight to ensure safety and functionality.