[Animats]

You're probably right, but this is new construction.

Guoer rewinds a lot of motors, most of which have a standard cast iron frame and field windings. She's regularly opening up old motors and finding burned-out windings. Badly burned out windings. Clearly, no motor protection circuit breakers were used.

She does use eye protection when angle grinding. She's a real artist with a angle grinder. She makes parts out of scrap sheet and tube with a angle grinder and a welder. I've seen people do worse with a whole machine shop available.

[1] https://www.aliexpress.us/item/2251832671094843.html