25 points

Why do electric motors eventually stop working???

If you touched two wires, each at 400 volts, would nothing happen??..

Answer 1:

Like most electrical mechanical devices, electric motors have mechanical bearings that eventually wear out.

The graphite brushes and commutator of older DC motors can also wear out over time

Answer2:

Question two is not specific enough!!
Are we talking DC?? Because if so, then yes, nothing will happen. Assuming you are insulted by ground.
Ac is a different story, as the two would light up dangerously and etc.

-your welcome!!

Ireally wish i could but i will do some research and when i find the answer i will come back to assist you ; )