Decora 15 Amp Residential Grade Grounding Duplex Outlet, White (10-Pack)

It means it's for home use. That's why it's cheaper, might not last as long as 'commercial grade', but what do yo expect!!??

The answer here may depend on the state that you live in. The easiest solution and probably the safest solution is to use copper pigtails (12 AWG for 20 amp devices and 14 AWG for 15 amp devices) with CU/AL rated wire nuts. These CU/AL wire nuts are more expensive but this is what you need to properly install these outlets. Piece of mind is priceless.

I checked online and it appears to be an American company tat has headquarters in both the US and Canada. I guess to make sure just check the receptacle when you buy it to see where it is made.

No, these outlets are for 120V AC.

Yes you can

You can use these what the side wire without a problem. Just make sure you're not overloading your circuit. And as a side trick I suggest once they're wired put a piece of electric tape over both screws on both sides. Just a little trick to avoid getting shocked if the Circuit is hot as well is if the ground wire should accidentally come in contact

I am not sure , you have to buy the same thing but 20amp

Quality is one. You know the old saying, you get what you pay for. The best outlets don’t have the holes for the wires in the back. The best way to connect to the switch and outlets are to use the screws. Then you should take Electrical tape and wrap over the screws all the way around it before putting back into the wall. This way it keeps things from touching screw heads and shorting out, should someone stick something in there a finger a screwdriver it lowers the risk of getting shocked. I’m not a big fan of fire, do you want to risk your home, shop or family. I lost my family home in a electrical fire when I was 11. We lost everything. No not because of outlet or switches that I know of. I was only 11. I just don’t take chances because of that. I hope this helps.

Yes

no