Zinsco was once also extremely popular and installed in rriany housing tracts throughout North America. It was later discovered by electricians andhome inspectors that certain Zinsco panelsoften fail to operate properly, leaving homeowners at risk to both fire and electrical shock. These panels can work fine for years, but as homes have increased energy demands, these panels may overheat and circuit breakers melt to the bus bar. When this happens, the circuit breaker nolonger functions properly as protection against overcurrent or short, shutting off the current. This causes a fire hazard.