Build That Deck

What is this knockout used for I have never seen anything using it.

Someone explain this. Seen this at a property today.

Is this acceptable practice?

I work new construction residential plumbing. I was doing a plumbing trim the other day and saw the electrician had outlets prepped like this, for using the outlet as a junction. Is this fine? Asking because my house built in 1999 has all the outlets junctioned like this. Central Florida USA.

I’m 19 started my electrical career 8 months ago and today I got the chance to do my first panel alone. I’m always looking to grow so any feedback is appreciated.

Welder by trade

Never buy a cheap meter. They read wrong!

A rare picture of an electrician sweeping up his own mess.

Transformer on the pole outside blew causing this damage as well as all the household electronics had to be replaced

Found this in an attic today ! w** is this ?? 😂😂😂🤦‍♂️

Plumber cut 240vac dryer line, electrician did this, is it right?

As title said plumber accidentally cut the line, electrician charged $350 for what looks like a twist/tape/shrink wrap, maybe soldered joints, maybe wago clips, I can’t tell. My thought was it needed a proper junction box. Thoughts? Thanks for your comments in advance.