On a 220 V line both the red and black wires are hot to the neutral wire.
There is no differance in the red and black wires except they go to
differant sides of the incomming 220 V wiring.

"Joey" wrote in message
...
If 220V, then no effect but make sure you have the proper ground there.
Normally black is the hot wire.

J


Davy wrote:

What would be the result if an electric hot water heater wires were
reversed?
If the wires going into the hot water heater were red wire to black,
black
wire to red, what would be the result when the hot water heater was
started
up?