So I got this LED light from home depot (2900 lumens, 4' wrap around). And there is something on it that says "90 degree C supply conductor minimum". What exactly does that mean? I am planning on installing bunch of these (although the other ones will not be this big, most area 1200 lumens) and while some of the circuits are using the new 12-2 NMB wiring and are all 20A circuits, there are indeed some which are the original BX cabling, and are only rated 15A. House is from 1950s. There are 3 types of cables that I see around: - The original 15A rated BX cables (two conductors inside cloth covered) - Somewhat newer 12-2 AWG on 20A circuits (looks a lot like new romex but the outer shield is much thicker). Cables are white. - Newest 12-2 AWG on 20A circuits. Cables are yellow. The problem is I dont know what Celcius rating #1 above is, the old BX cables. Furthermore, I dont even know if the 12-2 NM cables are good enough. I did do some reading on this searching the forums and I'm confused about the suggestions provided by people which mentions installing a junction box somewhere and running a 90C wiring to the light fixture. I dont understand how is this supposed to help when rest of the circuit all the way to the breaker is still not as good wiring? Also on a side note, the entire premise of LED is that they consume very little power, correct? So how is it that I can safely put bunch of 100W light bulbs but this little thing with tiny dots of lights requires almost 200F protection? [B]EDIT: Just confirmed the wire types #2 and #3 are both NM-B which are as per my research rated 90C. So the question is only for #1.[/B]

I've done a bit of wiring over the years, but I ran into a situation with a new ceiling fan just now and I need some help. [list] [*](Ceiling wires in bold) [*](This is all run through a single wall switch) [/list] 1) Took out an old ceiling fan (with light) that was wired [b]Black[/b] - Blue [b]White [/b]- White [b]Red [/b]- Black [b]Green [/b]- Green The old fan/light was working fine. We'd flip the switch, and just control the fan/light combo with the pull cords. We could run just fan, just light, or both fan and light. ------------- 2) I wired the new one (also has a light) like this [b]Black[/b] - Black [b]White [/b]- White [b]Red [/b]- Blue [b]Green [/b]- Green The [i]light [/i]worked, but not the fan. Tried every pull cord combo, but nothing would get the fan to work. -------------- 3) So I tried this [b]Black[/b] - Blue [b]White [/b]- White [b]Red [/b]- Black [b]Green [/b]- Green The [i]fan [/i]worked, but not the light. Tried every pull cord combo, but nothing would get the light to work (yes, I checked the bulb and the connections...everything was fine) The fan worked, but not the light --------------- 4) So I did this, and now both the light AND the fan work. [b]Black[/b] - nothing [b]White [/b]- White [b]Red [/b]- Black - Blue [b]Green [/b]- Green But now I'm left with a black ceiling wire that isn't connected. Is it ok to just cap it and stuff it back in the box? Thanks for the help!