When I was 6 to 10 years old what were the first things my Dad (An Electrical Contractor in Los Angeles county) taught me about AC electricity

 The first thing he taught me is just how easy it is to die from AC electricity especially 220 like stoves and some washers or driers and hot tubs and various other things might use at your house or business.

He taught me never work around water (especially rain) (even though in Seattle he often had to learn how to do this because this is where he learned his trade from his father beginning likely around 1930 because he graduated Valedictorian of his High School Class there in 1934.

So, first thing is never stand in water doing electrical work. Period.

Next a gold necklace is death like a Saint Christopher Medal or a Miraculous Medal from France from Saint Catherine de Laboure. Either of these things or anything metal or gold or silver can kill you instantly from even 110 volts. Why?

Because it's too close to your brain and we are electrical too so the power would short out your brain and heart from functioning instantely.

the next thing won't kill you but will burn off your ring finger of any metal (gold silver or any metal ring) you are wearing. So, wearing a wedding ring or any ring at all can burn off your finger almost instantaneously under the right circumstances.

Next. Never use an aluminum ladder while doing electrical work. Why?

Because the aluminum also carries electricity and could kill you.

Next. Never put your aluminum ladder into water because that could kill you too.

So, you will notice that electricians generally use either wood ladders or fiberglass ladders which will insulate the electrician from being electrocuted.

Also, I have been shocked by 110 volts many many many times. I have also been shocked by 220 volts which blew me across the room when my muscles fired so it's good I survived this and got blown away across a room rather than got stuck on 220 and died. 

Many other things happened to me from about age 10 to 21 while I worked part time mostly in Junior High and High school and sometimes in college to as an Electrician's helper at my father's business. I was able to buy motorcycles and cars with the money I made and to travel all over California on Weekends including Skiing and SCuba diving and snorkeling and Surfing and body Surfing.

The point is: 

If you don't know what you are doing with electricity it is really easy to die or have a finger burned off if you wear a metal necklace of some sort. 

So, be careful out there when attempting anything electrical if you aren't knowledgeable and methodical enough to survive it.