What's going on with this junction box?
Post date: 2022-01-24 10:16:34
Views: 134
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:
Week in review: We initiated a position — plus, top gainers and laggards of 2025
Be careful buying the top 10 ETFs of 2025: They have 'very little, if any' role in your portfolio, says expert
Chip stocks rally to start 2026 after third-straight winning year
Buffett says Berkshire has the best odds of any company for lasting 100 more years as he hands over reins
Minneapolis Fed's Kashkari indicates interest rates don't need to be cut much more
Protest over AI, climate crisis leaves tens of thousands without power in Berlin
Overspent this holiday season? 3 easy ways to pay down debt
2026 tax brackets could mean a slightly bigger paycheck — what to expect
Chick-fil-A launches its biggest ever marketing campaign as restaurant industry traffic shrinks
Maduro overthrow could pave the way for these U.S. oil companies to recover assets seized by Venezuela