@GG1 4877 posted:
The reality is simply this. A typical 120V AC receptacle is rated for 15 amps assuming it has 14 gauge wiring or 20 amps with 12 gauge wiring. The ground or the third prong is simply a safety device in case your hot side of the receptacle overloads and draws more than the rated amperage for the circuit.
As long as you are not exceeding 15 amps total you will be perfectly safe and meet the code requirements for the rating of a typical residential receptacle. Even then it assumes that every device is on at the same time to draw the maximum amperage.
It doesn't have to be any more complex than that, engineer - electrician - or other.
I'll speak from a completely foreign perspective, that of a retired semi-pro musician. Not advocating this at all, but we plugged in an entire rock band setup for a gig during my college days into a mogul screw in adapter from a light bulb. (Mogul as in the type of screw base, not the 2-8-2 ) We did not start a fire and we made a heck of a lot of noise. I never said we were good, but we sure were loud!
So, exactly how many "tuck 'n roll" Kustom amps can you plug into one light bulb socket ?