You think this would be easy to find, either a government history site talking about how they made houses safer, or a union boasting about getting laws passed, but all I get are lots of how to become one, or how to hire one sites.
@nev Good idea
@Canageek another thought: have you tried searching by specific city? This might be in municipal level regulations as well
@nev Have not, adding location terms just increased the number of hits to hire electricians
@Canageek This is about engineers, but seems reasonable that licensing for engineers and electricians could have similar timelines. https://www.nspe.org/resources/press-room/resources/100-years-engineering-licensure
@jessmahler Might be, but that doesn't help as 1925 is in the middle of the passed some places period. :S Thanks though.
@Canageek You're welcome?
Good luck
@Canageek if all else fails, /r/askhistorians?