Trade humour runs on precision, so get the terminology right — an electrician will forgive a corny pun long before they forgive calling a breaker a fuse. Current, resistance, grounding and spark jokes all land, and the more specific the term, the better the groan.
These work best delivered deadpan, as if you are asking a genuine technical question that only turns into a line at the last word.
A generic compliment tells someone you noticed their face; a properly-aimed electrician pun tells them you noticed their trade, which is rarer and lands better. That is the whole logic of this category: specificity is flattery. Apprentices trade these on site, and a civilian who gets the terminology right earns instant credit.
The same principle runs through the other trades — plumbers, builders, carpenters — so if your target wields different tools, match the material to the toolbox.
