I read today on the Underwriters Lab website that a main panel can be alive
although the main circuit breaker is OFF. They did not elaborate.
How is that possible? When I turn the main circuit breaker to the house to
OFF , all electricity is supposed to be OFF. Or not?
The input lugs will still be hot and with some types of split bus
panels the rails can still be hot.
The disconnect only gurantees that no power gets out of the disconnect
enclosure. There will always be hot stuff inside the enclosure.
translation for DUMMIES
When you shut off the main breaker there is still "HOT" power between the
breaker and the outside of the house "Road Power" So the inside of where you
want to install a new breaker is "DEAD"
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