Suddenly no ac at wall switch, CBs not tripped.

[Venkman]

Got a led can light over shower that suddenly stopped working.

No AC to the feed wires of the can.

No AC to the wall switch that controls the light.
Both black wires connected to the switch are not powered.

No CB is tripped at the panel.

All other circuits in that bathroom and all surrounding rooms are working. Can't find a particular CB dedicated to that one light.

My thoughts are that it must be a disconnection between the switch and house power and that I will have to trace the wire feeding the switch back to a junction box or to the panel.

[FatimaandAhmed]

Your analysis of the situation seems quite thorough and your proposed course of action is logical. Based on the information you've provided, here's a summary of the situation and some thoughts:

1. No power at the light fixture or the switch
2. No tripped circuit breakers
3. Other circuits in the area are functioning normally
4. No dedicated circuit breaker for this light

Your conclusion that there's likely a disconnection between the switch and the power source is reasonable. Here are some steps you might consider:

1. Trace the wiring: As you suggested, tracing the wire from the switch back to a junction box or the panel is a good next step. Look for any accessible junction boxes in the attic, basement, or crawl space that might be on the path between the switch and the panel.

2. Check for GFCI outlets: Sometimes, bathroom lights are connected to GFCI circuits. Check if there are any tripped GFCI outlets in the bathroom or nearby areas.

3. Inspect for visible damage: Look for any signs of rodent damage, water intrusion, or other issues that might have caused a wire to become disconnected or damaged.

4. Use a circuit tracer: If available, a circuit tracer can help you follow the wiring path without opening walls.

5. Check connections in the panel: Even if no breaker is tripped, it's worth checking the connections in the panel for any loose wires.

6. Consider hidden junction boxes: In some cases, there might be a junction box hidden behind drywall that has become loose over time.

Remember, if you're not comfortable or experienced with electrical work, it's always safest to consult a licensed electrician. They have the tools and expertise to safely trace and repair electrical issues, especially those hidden behind walls.

Would you like me to elaborate on any of these points or discuss any other aspects of troubleshooting this issue?