What's going on with this junction box?
Post date: 2022-01-24 10:16:34
Views: 181
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:
CoreWeave stock slides as quarterly revenue guidance disappoints
Trump said tariffs could someday 'substantially replace' income taxes. What policy experts say
Answered: Can I upload video in q2a by a plugin?
Special Event: MetaFilter Board Town Hall
Gen Z is embracing the prenup, says family law attorney: ‘The taboo of divorces is long gone’
Pakistan bombs targets in Afghan cities, minister calls it 'open war'
How high can oil and gas prices go because of the Iran war? Here are the scenarios
The Strait of Hormuz crisis explained: What it means for global shipping
OpenAI's Altman admits defense deal 'looked opportunistic and sloppy' amid backlash
Book: finnegans wake