Yes fixture weight. a 7 pound fixture that needs to be installed.As in fixture weight.....?
You don't need a ceiling fan box unless you are installing a ceiling fan or a fixture more than 25 lbs if memory serves. Even then you don't need a ceiling fan box if you can support the ceiling fan independently of the box.Yes fixture weight. a 7 pound fixture that needs to be installed.
I don't have my code book on me but for some reason I keep thinking I'm supposed to change the box out to a ceiling fan rated box....but maybe that's only for new installations
About the only common feature of old K & T or old BX ceiling junction boxes is that they were mostly non-galvanized steel painted black.How much weight can an existing "hockey puck" size JB old? The old JB that is common for old K & T or old BX.