Zinsco electrical panels are problematic due to what issue?

• A. Difficulty obtaining replacement breakers
• B. Loose breakers
• C. Not enough amperage for modern needs
• D. Poor connections to the bus

Answer: (D)

Zinsco electrical panels are particularly concerns due to their tendency to have poor connections to the bus. This issue arises from the design and material quality used in these panels, which can lead to overheating and an increased risk of failure. The connections between the breakers and the bus bars are vulnerable to becoming loose over time, which can create electrical arcing and even fire hazards. This makes it crucial for inspectors to assess Zinsco panels critically during residential electrical inspections. Although obtaining replacement breakers and modern amperage needs are relevant considerations, the fundamental problem that has raised alarms about Zinsco panels centers around the reliability and safety of the connections to the bus itself.