What's going on with this junction box?
Post date: 2022-01-24 10:16:34
Views: 368
I removed a ceiling light in my apartment only to discover a junction box with wiring I did not expect. Photo here. Left to right: two-strand white wire; four-strand blue wire; single-strand red wire.

This is an old (late 1960s) apartment building in NYC, and I'm all but certain the box dates to that time. The white and red wires were connected to the old lamp. It's the blue wire that I'm confused by. (All wires had wire nuts before I removed them.) I was hoping to see a green grounding wire, but alas.

So, what's up with the blue wire? Do I need to be calling in an electrician here? Thanks for your advice.
Number of Comments
Please click Here to read the full story.
 
Other Top and Latest Questions:
Polymarket faces renewed CFTC probe over U.S. access to offshore platform
Trump administration may let more Russian diesel onto market, energy secretary tells CNBC
Anthropic's IPO could be 'speculative fiction' or a 'generational moment' — investors are split
Trump jokes $5,000 would buy 'a hamburger and maybe a small dessert' at Mar-a-Lago as cost of living looms over midterms
Amazon's anti-tokenmaxxing memo says engineers should be pickier about using AI
Boeing shares slide on a disappointing cash flow update. Why this dip is buyable
To ID.me or not to ID.me?
Neighbour/community simulators?
I planned ahead yet am still last minute
Treasury Department announces new Series I bond rate of 5.51% for the next six months