Maybe depends which kind of fuse or breaker. There are instantaneus trip, nontime delay, time delay, and inverse time fuses. Now days most all breakers are dual rated as HACR and whatever the other rating is. However there are also breakers made specifically for HID lighting that are better designed to handle the inrush current of High Intensity Discharge lighting.
That being said, John T is corect in that now, the fuse or breaker protects the branch circuit and to a point the motor. The motor overloads thermally protect the motor.
Re: Sparkie Question in reply to Greg K, 01-04-2013 19:28:59
Duel element or time delay or K5 etc fuzes are to allow a motor to start since that may be like 5 times the run current!!!!!!! Yeppers, youre right on, the breaker or fuze in the panel is to protect the branch circuit feeders while the thermal overload device is to protect the motor, two seperate and distinct functions....Its NOT rocket scient but to lay persons it may be hard to understand???
Re: Sparkie Question in reply to John T, 01-04-2013 19:33:24
It's sometimes difficult for me to understand! It is the same principle on that the breakers protect property and Ground Fault Circuit Interrupters (GFI's) protect people. If you don't understand the function it makes the rest of it confusing.
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