[Michael Marks]

Hey Eric,

New member, first post, long-time viewer. Thanks for another video.

So, you concluded that the motor shorted, allowing much greater amperage through the circuit, thus damaging the speed selector switch.

If the blower motor power circuit is fused at 40 amps, why aren’t all components in-line of that circuit also rated to handle 40 amps? Depending on the blower motor resistance to hold back the amperage seems like a bad idea. The speed selector switch and the variable speed resistor ought to be able to handle at least the amperage they are fused at. The wiring to the switch seems much too small for the fuse size also. You could not do this in normal industrial wiring. Thoughts?

Also, did you ohm the old motor or get an amp draw and compare to the new? I’d be curious to see if the old blower indeed had much lower resistance.

Thanks for all the videos. Carry on being awesome.

[Michael Marks]

Hey Eric,

New member, first post, long-time viewer. Thanks for another video.

So, you concluded that the motor shorted, allowing much greater amperage through the circuit, thus damaging the speed selector switch.

If the blower motor power circuit is fused at 40 amps, why aren’t all components in-line of that circuit also rated to handle 40 amps? Depending on the blower motor resistance to hold back the amperage seems like a bad idea. The speed selector switch and the variable speed resistor ought to be able to handle at least the amperage they are fused at. The wiring to the switch seems much too small for the fuse size also. You could not do this in normal industrial wiring. Thoughts?

Also, did you ohm the old motor or get an amp draw and compare to the new? I’d be curious to see if the old blower indeed had much lower resistance.

Thanks for all the videos. Carry on being awesome.

[Author]

Replies