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New project: Dividing my original circuit for my shelf in two circuits.
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I found this little 30A two fuse panel in the scrap metal container BY PURE LUCK at the local recycle centre. I was digging in the container to reach a 4 lamp troffer (with the authorization of the employee of course!) and something fell on my foot. I was about throwing it farther in the container but I realized it was a panel, WOOPS!
I brought it and installed it! I can even use period-correct fuses, since I was already collecting them! I even have those Type C fuses not made anymore!
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2nd note: The circuit was lit up when I took the pic, so that's truly a pic of the panel in action!
EDIT: The blown fuse is in the unused circuit LOL.
I believe neon switches are still available but they're pretty hard to find. The mercury switches are no longer made though. And yeah our colour code is still black(Line 1), red (Line 2), white (Neutral) and green/bare (Ground) for most residential wiring.
Another type has the neon light separate from the switch toggle.
BTW, the modern neon switches can wreak havoc upon CFLs in the form of flashes because they still must pass a small current through the filament of the bulb (assuming incandescent) to basically sense, "Am I on or am I off" and I would assume simplify the wiring/circuit. This current is too small to even dimly light the filament in an incandescent bulb but can make CFLs flash occasionally. I have also heard of this small current making starters in preheat fluorescents glow dimly but not enough to "fire". Some motion detectors, photocells, electronic timers, etc. can do this as well.
On Indicator lights, they were mostly small neon indicators that were in the toggle which light up at times to show the location of the switch in the dark or to show that the load it controls is on like how I mentioned above....
Older switches had a problem with non incandescent loads as it passes a small current through the switch to power the light but newer ones usually have a neutral connection for the neon light. This eliminates the problems they have with non-incandescent loads as the current returned through the neutral but it makes them not compatible with some switch configurations. (IE the type where there's only switched and unswitched hot in the switchbox).
Some dimmers, timers, PCs also need a neutral for the same reason too.