What's going on with this junction box?
Post date: 2022-01-24 10:16:34
Views: 186
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:
Russia and Ukraine agree local truce to allow repairs at Europe’s largest nuclear power plant
UK PM Keir Starmer suffers major blow after his party comes third in key vote
Where can I ask the MetaFilter board all my burning questions?
Answered: Can I upload video in q2a by a plugin?
Core wholesale prices rose 0.8% in January, much more than expected
Gen Z is embracing the prenup, says family law attorney: ‘The taboo of divorces is long gone’
How traders played Monday's comeback, and what they think will keep working during the turmoil
The digital front: Iran’s internet down for over 60 hours amid reports of cyberattacks
OpenAI's Altman admits defense deal 'looked opportunistic and sloppy' amid backlash
Saturday Night Live: Connor Storrie/Mumford & Sons