What's going on with this junction box?
Post date: 2022-01-24 10:16:34
Views: 360
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:
Amazon's anti-tokenmaxxing memo says engineers should be pickier about using AI
Meta- and Google-backed Jio Platforms’ shares soar over 21% on trading debut after record IPO
Wednesday's big stock stories: What’s likely to move the market in the next trading session
Neil Young sues Trump committee for $10M for playing 'Rockin' in the Free World' at rally
Polymarket faces renewed CFTC probe over U.S. access to offshore platform
Stocks making the biggest moves after hours: Visa, Robinhood, NXP, Seagate and more
Movie: Fjord
VisionQuest: Reboot
Movie: Ghosts: The Possession of Button House
Stock futures are mixed as traders await Fed decision, Big Tech earnings: Live updates