The fan itself should be the junction box. The cable should go into the fan and be connected inside. It looks like the cover with the cable clamp...
I do not do regular maintenance. If I have a drain with an issue I deal with it then.
You can't use the NM-B romex in the conduit. It is not rated for wet locations. All conduit outside or underground is considered a wet location.
That is a capacitor for fan speed control.
Based on all the puncture slits I would that wood is pressure treated and probably ground contact rated.
Water damage. Looks like water is getting into the brick and freezing. The freezing water expands and blows the bricks apart.
The main breaker will be the supply to the whole panel.
You need a picture closer up on the problem. I can't see any issue in the pictures posted. If you are in a freeze zone it is likely water...
Sounds like bad bulbs. Can you post some pictures of the damage. No way a bad switch could cause damage at the fixture. The bad bulbs could have...
If you live in Canada you must use 20 amp T slot receptacles on a 20 amp circuit.
C racked is not usually an issue but LEANING could be serious.
Hot and neutral must be carried in the same cable.
This is the setup you have. If your smart switches require a neutral then you are out of luck. You have a switch loop. No neutrals are present at...
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