How to size motor start cap?
On Thursday, July 19, 2018 at 2:10:21 PM UTC-4, Ralph Mowery wrote:
There are two things wrong here.
First this is an AC motor with AC capacitors. Electrolytics will not
work on AC as a general rule. *Wrong.*
From Wiki:
Start capacitors above 20 µF are always non-polarized aluminium electrolytic capacitors with non solid electrolyte and therefore they are only applicable for the short motor starting time. ... If a motor does not start, the capacitor is far more likely the problem than the switch.
A non-electrolytic cap, AC or DC of that rating would be as big as a football, or larger.
The motor is 40+ years old. That is not 'newer'.
That covers both *wrong* things.
Peter Wieck
Melrose Park, PA
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