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In Reply to: Just for the record... posted by Steve O on September 15, 2012 at 21:59:07:
I ^2 R will give you the actual Pdiss in watts across the resistor.
or
Ohm's law: I=V/R , as Steve O pointed out.
Then x3 or x4 that result, for the resistor rating in watts for good sleep factor and longevity.
NI wirewounds run much hotter than inductive. Mills used to post the curves on their website prior to being bought out by Huntington.
The Dale RH AL. housed resistor(or any AL housed resistor) should have a "W" rating for mounted and not mounted. See how low the wattage rating drops when not properly heat sinked to a metal housing. Some x-fer grease helps.
Cheers,
W
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Follow Ups
- Then you'll need a "good sleep factor"... - wheezer 09/16/1204:45:47 09/16/12 (0)
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