[Truthoverpower]

As an engineer with multiple degrees , who works as an electrician , I have a standard question that I ask all licensed electricians

if they can’t answer it they really have no business being an electrician

but amazing way to out of three cannot answer the question

Question: what does 277/480Y mean ?

[mad_as_he$$]

“Question: what does 277/480Y mean ?”

That the motor I have in stock will work! ;-)

[JJ_Folderol]

As a WAG since I don’t work with power distribution and I’m not an engineer:

1 Phase

[caver]

277 volts, 3 phase?

[StAntKnee]

277/480Y
___________

Epstein did not kill himself?

[Don W]

Question: what does 277/480Y mean ?

Seriously? Any electrician that can’t answer that should have his certification pulled, and be sent back to first year pre-apprentice classes.

[Quality_Not_Quantity]

Question: what does 277/480Y mean ?

3-phase AC power in a wye configuration. 277 VAC from the neutral to any of the phases, and 480 VAC phase to phase.

And yes, if Sparky doesn't know it, it's time for him to get a job at the bodega where he belongs - presuming he can answer Ahmed's math problem, that is...

[SanchoP]

Question: what does 277/480Y mean ?

You just blew up the fax machine in the office. :)

[no-s]

277/480Y

I'm no electrician but when you write it that way it seems like you're describing the output (secondary) of an ac transformer, where the voltage is 480v across the legs of the wye and the voltage across a leg is 277v. But don't ask me to connect it up properly, it will take me all day to figure it out.

[Swordmaker]

but amazing way t(w)o out of three cannot answer the question

I would guess that those two out of three only work in residential electrical work and not industrial, never running into three-phase wiring, or, alternately know only how to wire three-phase and do no trouble shooting after-the-fact corrections of three-phase. They wouldn’t ever be in the position of putting a meter on a three-phase system to measure the voltages, and just know by rote the running of the wires, having learned in an apprentice program. I.e. in this situation , do this; in another, do that, all without really understanding why. I’ve run into “electricians” of that stripe. They defer to a real electrician when out of their depth.

My elder daughter’s first house was obviously wired by one of those “electricians”. . . for example, when I was remodeling her kitchen and bathrooms, I discovered that for some reason a wire came off of a light switch in the master bedroom suite’s bathroom and ran off toward the kitchen and just stopped. . . no wire nut. . . no reason I could figure out. Why would you want to switch anything in the kitchen from the master bath? There were similar wires that went nowhere in other locations. It often made no sense. . . and all appeared to be original work when the subdivision was built.

There were other obvious signs in retrospect in that house of drive-by inspections. . . In the entire development as well. Me thinks that some money changed hands from the builder to the inspector.

[jmacusa]

Voltage output?

[TexasGator]

“Question: what does 277/480Y mean ?”

Thanks! I will make sure to ask the electrician that comes to my house next time.

[IYAS9YAS]

uestion: what does 277/480Y mean ?

Not an electrician by any means, but is it something to do with commercial-based (and oddly-numbered) 277-volt/480-volt service connection?