Many of the homes in South Florida were built in the 1920’s. In particular, Spanish style homes, although warm and beautiful, were wired using the knob and tube method. (Two wire system with no ground. This outdated wire was the protocol between the years of 1880’s and 1930’s and some electricians even continued using this method well into the 40’s and 50’s.
In our experience this wiring becomes dangerous when:
“Electricians” take it upon themselves to splice additional branches or fixtures to an existing knob and tube circuit.
There is a lack of Ground. The fact that it is a two wire system (hot and neutral with no ground) creates a higher risk of fires.