I live in an older home I bought 2 years ago. It was built in 1924. While becoming familiar with the electrical system I discovered the circuit powering the heating furnace, from a 20 amp CB in the main box. As I traced the conduit to the gas furnace I found "power switch" box that contained 2 olde-fashion fuses.
When I opened the fuse/switchbox I found 2 fuses. A 30amp & a 15amp. Is this correct? Seems to me the fuses should be the same rating, right? Is 2 30amp fuses correct considering that the CB Box breaker is rated at 20 amps? Thanks! Dave
Here's the CB in the box. 20amp 120v.
Here is the fusebox with door closed. Not sure what the text means. Is it possible that prior to the currently installed gas furnace there was a 240v electric furnace that was protected by this fusebox? And then when it was changed to gas they used the previous 240v wire for the 120v line needed?
Here's the furnace name plate.
Here's the Gas Furnace Manual title page with the model number, etc.