HOLT Electricians Practice Exam

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Where should barriers be placed in service switchboards?

Between the busbars and terminals
At the circuit breakers
Around the entire switchboard
Only on the top section

The correct answer is: Between the busbars and terminals

In service switchboards, barriers should be placed between the busbars and terminals to ensure safety and prevent accidental contact with live parts. This positioning is critical because it minimizes the risk of electrical shock or short circuiting while providing a clear separation between high voltage components and user-accessible areas. By using barriers in this manner, it is also easier to maintain and work on the switchboard safely, as maintenance personnel can perform their duties without inadvertently touching energized parts. This design promotes a safer working environment and helps to comply with electrical safety codes and standards, which require proper guarding of live parts to protect workers and minimize hazards.