Is there a term for "mains power" in U.S. English?

Haven't heard the phrase "mains power" here in America, ever in any context. I think "Wall power" refers to power that comes from "the wall" and "house current" refers to 120V/60Hz which may come from a generator etc. I don't think "wall power" can come from a generator.

Wikipedia says:

In the US, electric power is referred to by several names including household power, household electricity, powerline, domestic power, wall power, line power, AC power, city power, street power, and grid power.

Which is indeed how I refer to household electricity. We never call it "mains power."

If someone began talking to me about the "mains," what I would think of is the power feed that comes into the breaker panel of the house (i.e. feeding the main circuit breaker), not the actual electrical outlets in the house.

I don't know what's more common in daily speech, but I've heard AC power a lot, and you will often find that on American websites describing computer components and in manuals. I'd not be surprised to read line power or grid power in a technical manual either, but AC power might be more frequent in a technical context. But I'm not sure. If you need to be absolutely unambiguous, you could simply call it 120-V power or something like that.

Definitely say AC power. And specify the voltage and the hz because in the United States power comes in two forms. In residences it's 120/220 (or in some areas 110/220) and generally 60hz. But in commercial applications it's often 130 volts. So be on the safe side and say exactly what you're talking about.

I'm a telecom product manager in the US. I just watched a preso where another PLM used the term 'mains power'.
I assumed it meant 120VAC, but frankly I googled it to be sure...

Point is, I think 'mains' is not yet common enough in the US for even a relatively technical American to confidently know what you mean...

I suggest sticking with "120VAC" (and perhaps add 'or mains power' so as to continue socializing the term in the US : )

I was trying to find a name easily understood by anyone. "The mains" is not anyways near a generalized term for what it is. Different Nations handle electricity (the mains) differently. But it's the same thing, it's electricity, just managed differently. I think "electrical power system" is a good term for how different nations handle electricity. Let "electrical power system" be representative of the numerous plugs, voltages, resistances, grounding and whatever may apply, to the individual way electricity is managed. Simple. Every nation or territory has its own "electrical power system" or systems, and anyone can easily grasp what "the mains" can't. The more simple, the easier to grasp and accept. My opinion.