LRod writes:
There is no neutral in a 240V circuit (North America).

There can be, it's a 4-wire circuit (black hot, red hot, white
neutral, bare ground) used for multi-voltage appliances like ovens and
dryers (240 for heat, 120 for lights, etc).

But a 3-wire 240 doesn't have a neutral. Or at least, it isn't
*supposed* to have a neutral. Circuits wired for 240v without a
neutral *should* have the white wire tagged with red tape or something
to indicate that it's not a neutral.