Thanks for the info. I saw a 1980s book while over there, but the only NEC reference I have here at the moment is a 1977 book, quoting - I think - the 1975 code.
I realized that local city/county codes could extend requirements beyond the NEC. You seem to have much more local decisions on everything than here (not just electrical, e.g. sales tax).
--dishwasher and garbage disposal ("garburator" in Canada!) can share a 20A circuit (non-coincident loads).
I thought it was common practice for these to be on a split-wired 120/240V circuit from a double-pole C/B to a duplex with the hot link tag broken off. Do you just use a single 20A 120V branch now then?
"Garburator" sounds like something out of Batman! Over here they're called waste disposals, "garbage" being looked upon as a very American word. Everyone would understand you though.
BTW, have enjoyed your perspective from the other side of the pond.
Glad you've found it interesting. When I run into other elecs or technically-minded people here I try to explain some of the differences in U.S. wiring.
Many think that everything runs on 120V; they don't realize that American homes have 240V as well, for example, and they're mostly unaware of the different color codes, lack of ring circuits, etc.