Skip to main content ↑ ↓
Topic: Electric fan control (Read 3699 times) previous topic - next topic

Electric fan control

Reply #15 –
Quote from: jcassity;252954
The thermal disc would not be a load bearing device but become the path to ground for the fan.  No voltage drop, no current and vertually zero resistance, just a part of the conductor to ground.


????? A DC electrical circuit is a closed loop. The current flows from the positive battery post to the negative post,  if you like to use traditional current flow, or the reverse if you are an electron theory guy.

Either way you have the same amount of current flowing in the ground wire as you have in the Hot with key on wire.

Electric fan control

Reply #16 –
i worded that knowing it wasnt exactly right,, the ampacity / k factor of the metal disc is more than or equal to the circuliar mills of the copper wire you would be connecting from the disc to the fan on the ground side.  yes there is current flow, but no voltage drop to speak of across the automotive version or the appliance version.  the terms suseptance or admittance would have been better suited i guess instead of the whole loaded circuit expression.

Electric fan control

Reply #17 –
Quote from: BCA;253029
I would be surprised if they are over priced. Have you tried pricing this same part through your local appliance dealer?
My gas range quite working on Christmas Eve and I ordered three major parts for it from this place. Even with overnight shipping, it was cheaper than any of the quotes I got from local suppliers for just two of the three parts I needed.


I think Emerson aquired Therm-o-disc recently.  When Therm-o-disc had thier own site up, similair non adjustable appliance version switchs were under a couple of bux.  Just because I deal with Emerson everyday, I know thier markup.........1.25,,, then another 1.50.
 

Electric fan control

Reply #18 –
I am just saying it doesn't make any differance if the thermal switch is on the ground side or the plus side of the motor circuit.