What's going on with this junction box?
Post date: 2022-01-24 10:16:34
Views: 255
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:
Meta’s push into cloud computing means Wall Street has to prepare for lower margins
Nvidia offers start-up customers chance to swap compute power for revenue share
Book: The October Film Haunt
Rivian raises 2026 delivery outlook while Lucid misses Wall Street expectations for second quarter
U.S. job creation cools in June with payrolls growth of just 57,000; unemployment rate at 4.2%
Apple plans five new iPhones through 2027, eyes Chinese-made chips amid foldable push, reports say
These are the top stock picks from UBS analysts heading into the third quarter
What became of the youngest Agees?
X-Men '97: Days of Past Future
Making ghost pepper popsicle how do I calibrate the heat?