What's going on with this junction box?
Post date: 2022-01-24 10:16:34
Views: 250
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:
Fed holds interest rates steady: Here's what that means for credit cards, savings rates, mortgages and car loans
CME CEO Terrence Duffy says the exchange operator will sue CFTC over perpetual futures
Jim Cramer says this chipmaker is still a buy after soaring more than 200% this year
Game Changer: Night Shift
Mr. Queen: Full season
Interview with the Vampire: The Vampire Lestat: Toledo
From Mom and Dad to Just Mom
What would happen if the POTUS started shooting people in the streets?
Jeffrey Gundlach says Fed's Warsh is not going to be the 'easy money' chairman many hoped for
How Elon Musk's second-in-command Gwynne Shotwell helped turn SpaceX into an IPO giant