What's going on with this junction box?
Post date: 2022-01-24 10:16:34
Views: 185
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:
UBS downgrades the U.S. stock market. Here's what has the investment bank worried
Netflix ditches deal for Warner Bros. Discovery after Paramount’s offer is deemed superior
Jim Cramer's top 10 things to watch in the stock market Friday
OpenAI announces $110 billion funding round with backing from Amazon, Nvidia, SoftBank
The Strait of Hormuz is facing a blockade. These countries will be most impacted
Qualcomm CEO sees robotics as a 'larger opportunity' within 2 years
OpenAI's Altman admits defense deal 'looked opportunistic and sloppy' amid backlash
Iran war live updates: U.S. embassy in Riyadh hit by drones, Trump promises response 'soon'
The Pitt: 2:00 P.M.
Movie: Mile End Kicks