I'd imagine Canada have much similar rules as USA which is described in the NEC. However even https://en.wikipedia.org/wiki/Electr..._North_America has some wording implying that neutral switching is taboo in most circumstances:
Originally posted by wikipedia Electrical wiring in North America
Need to find the explicit rule, and then again whether this is only for building wiring or does it apply to end run pluggable equipment as well...
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