In electrical terminology it means that wires have been connected under the wrong terminals.
talking at cross purposes-a misunderstanding.Perhaps linked to image of old telephone system where you're connected to wrong caller.
A cotter joint is used to connect the piston rod with a cross-head...
Ethernet cross-over cable
I think by 'cross wiring' you mean reverse polarity. This means the hot wire is connected to the neutral screw and the neutral wire is connected to the hot screw. This shouldn't have any impact on an AC motor, since AC voltage already changes polarity 60 times per second.
You cross the battery.
its a Celtic cross
Yes, by using a cross-over cable.
traverser = to cross (as in to cross the street)
its all connected
(to) be connected.
We are connected
The Christian Cross refers to the cross which Jesus died on and signifies the importance of him.