It's no different than an over-range microwave/fan combination, Bill. Those all require a plug-in receptacle in the cabinet above, too. Range hoods that are designed as direct replacements come the same way...the Hauslane unit I just installed (which is excellent) was specified that way. There's no "extension cord"...the outlet is required to be within a certain area. I did need to take the cabinet down to create the pathways for the venting, but otherwise, nothing changed with the switch from the (undesirable) over range microwave/fan (unvented) to the new hood (vented) electrically.
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The most expensive tool is the one you buy "cheaply" and often...
My old house, 1949, was 1/2" button board with 1/2" hard coat plaster on top of that. I would say plaster and lath would be the same or thicker total.
The old work boxes almost work with the button board walls. I got good at mounting them next to a stud with screws from the inside of the box. I used. a Aro pancake drill to drill pilot holes and a pnumatic ratchet to drive hex head roofing screws.
Bill D
You guys realize OP has already finished this, right?
Yoga class makes me feel like a total stud, mostly because I'm about as flexible as a 2x4.
"Design"? Possibly. "Intelligent"? Sure doesn't look like it from this angle.
We used to be hunter gatherers. Now we're shopper borrowers.
The three most important words in the English language: "Front Towards Enemy".
The world makes a lot more sense when you remember that Butthead was the smart one.
You can never be too rich, too thin, or have too much ammo.
The vent vs vent free hood debate is interesting. Wood lath and plaster is 3/4 inch thick. I have seen it as thin as 1/2" and as thick as 1"
Best Regards, Maurice