Which task must qualified electrical workers demonstrate proficiency in?

Qualified electrical workers are required to demonstrate proficiency in handling electrical circuits as it is their primary area of expertise. This involves not only the ability to interpret electrical diagrams and schematics, but also to understand safety protocols related to working with electricity, such as lockout/tagout procedures and the proper use of personal protective equipment (PPE). Demonstrating proficiency in this area ensures that the worker can perform tasks safely and effectively, thereby minimizing the risk of electrical accidents, which can have serious consequences. Other tasks listed, such as installing plumbing, operating heavy machinery, or welding procedures, fall under the expertise of different trades and do not require the specific qualifications that electrical workers possess. Their training is focused specifically on electrical systems and safety, ensuring that they can manage the complexities associated with electrical work confidently and competently.