What's going on with this junction box?
Post date: 2022-01-24 10:16:34
Views: 291
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:
Private companies added just 44,000 workers in July, below expectations, ADP reports
The IRS is getting better at spotting crypto tax mistakes. Here's what it means for investors
Movie: The Egg and I
Chipmaker Broadcom is breaking out. How Tony Zhang is trading it
Movie: Mermaid
Another "identify this title from my youth" question
Uber stock sinks 7% after weak guidance despite revenue growth
Follow-up - anti-depressants and (male) sex, difficulty climaxing
Disney tops earnings estimates as parks and streaming offer a boost
Stargate SG-1: The Warrior Rewatch