Hello,
I have a modern wood furnace that is fully controlled by electronics. It is located in a house that has very old wiring (probably at least 50 years old). I also have a small workshop in this same building (I'm planning to redo the wiring just haven't gotten around to it yet). Whenever I run a higher power tool (angle grinder, router,...) in the workshop it blows a 100mA fuse on a PCB of the furnace.
Do you think this is a result of the old wiring or could there be some other reason for it? I do feel that the most common things to blow the fuse are inductive loads. The only thing that's confusing is that it blows randomly and not always. Also I don't remember ever having this problem when running 3 phase motors.
Thank you for any kind of insight (it's driving me up the wall as it has been going on for the last 5 years). Have a nice day.