Why Do Zinsco Panels Malfunction?

Experts Have Identified Two Major Reasons

Experts report that Zinsco circuit breaker panels may have two major faults that could pose a danger:

1. Zinsco panels may not meet today's updated safety codes.

Production of Zinsco panels halted in mid-1970s. Experts say that Zinsco panels produced during this time would not receive today’s UL listing. They would not be allowed to be sold to the general public because they no longer pass current safety codes. Safety standards that were once acceptable years ago are no longer considered safe.

2. Zinsco panels may have significant design flaws.

Experts report that the identified design flaws in Zinsco panels are not shared with other panels of similar age. Some of the problems include:

  • Certain components of the panel contain aluminum.
  • The connection between the breakers and the bus bar is often not solid.
  • The bus bar appears to corrrode easily.
  • Breakers may appear to be off, yet internally the panel is still conducting power.

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