What's going on with this junction box?
Post date: 2022-01-24 10:16:34
Views: 157
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:
Intel's likely to still move higher. Here's a 'no-cost' options strategy to play it
Advisors to the ultra rich say AI isn't a gamechanger for landing new clients
Airlines cancel hundreds of flights as massive winter storm sweeps across U.S.
Adani group stocks plunge as U.S. SEC looks to question founder over fraud charges
In an affordability crunch, Gen Z adults are leaning on their parents for financial help
Shares of CSG, one of the world’s fastest-growing defense firms, jump 31% on debut
Trump administration to take 10% stake in USA Rare Earth in $1.6 billion deal, sources say
Auto executives are hoping for the best and planning for the worst in 2026
China's AI trade is quickly moving from infrastructure to applications. Watch these stocks
The U.S. states where you can retire at 65 with less than $1 million in savings