What's going on with this junction box?
Post date: 2022-01-24 10:16:34
Views: 280
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:
Disney tops earnings estimates as parks and streaming offer a boost
SpaceX stock falls 7% after AI spending surge rattles investors
Another "identify this title from my youth" question
SpaceX's earnings are not helping its stock, but Nvidia is getting a boost
Movie: The Egg and I
Movie: I Vitelloni
SpaceX moon crash is a perfect metaphor for rocket maker’s share price, analysts say
Salad and Go files for Chapter 11 bankruptcy after cyclospora fears worsened its challenges
Bank of America spends $250 million a year on GLP-1 drugs for its employees, CEO says
Chipmaker Broadcom is breaking out. How Tony Zhang is trading it