In article , Mark Lloyd wrote:

May be true. It depends on how the circuit is wired. I have one here
where that is not true, each box has:

1. hot
2. neutral
3. connected only to light

It's #3 that is connected to the common terminal of the switch.

There are multiple Code violations in that setup.

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Regards,
Doug Miller (alphageek at milmac dot com)

It's time to throw all their damned tea in the harbor again.