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Ground fault

J

Jasen

Jan 1, 1970
0
Let's clarify, shall we?

Overcurrent will trip a GFCI _circuit_breaker_ -- but that's because it's a
circuit breaker, not because it's a GFCI.

a circuit breaker is unlikely to blow from a motor that's only overloaded.

a blockage may reduce the load on the motor.


Bye.
Jasen
 
E

Eeyore

Jan 1, 1970
0
Jasen said:
a circuit breaker is unlikely to blow from a motor that's only overloaded.

That'll depend on the current it draws won't it ?

Speculation about that gets us nowhere. The OP needs to measure the current draw. Guesses about
it are pointless.

a blockage may reduce the load on the motor.

Since when ? And what would be the mechanism by which the load is reduced ?

Graham
 
M

Martin

Jan 1, 1970
0
That'll depend on the current it draws won't it ?

Speculation about that gets us nowhere. The OP needs to measure the current draw. Guesses about
it are pointless.

Very true

Since when ? And what would be the mechanism by which the load is reduced ?

Graham

Centrifugal pumps will often produce less load on the motor when there
is a restriction on the input or output. there will be less mass flow
through the pump, and it will rev up even though it is pumping less
"stuff". The torque from the motor (and amp draw) will decrease.
It is not intuitively obvious, and is the opposite behavior to a
positive displacement pump, which will usually slow down with a flow
restriction.

Take a shop vac and put your hand over the hose, you will hear it
speed up a lot.
 
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