How are parallel circuits used in homes?

Every single thing in your home that's plugged into a wall outlet or works with a switch on the wall . . . every lamp, ceiling light, room fan, computer, microwave, stove, hair dryer, coffee pot, toaster, slow cooker, TV, home entertainment system, printer, wifi router, cordless phone, phone charger, and clock radio ...  they're ALL in parallel.

And chances are that everything in your house is also in parallel with everything in the houses of a few of your neighbors on each side of you.

THAT's how parallel circuits are used in residential areas.

The number of protons it has.