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Posted by kool on July 10, 2007, 12:58 pm
How do they rate air compressors at 5HP when they have a 3/4 or 1 HP motor
driving it?
> On Mon, 09 Jul 2007 17:10:50 -0500, dpb wrote:
>
>> Toller wrote:
>>>> Henry wrote:
>>>>> I was wondering what cable size to use for wiring a 125V 12 amp fan
>>>>> that
>>>>> is 100 feet away from the breaker panel.
>>>>>
>>>>> Thanks.
>>>>
>>>> You should be able to use 14 gauge wire.
>>>>
>>>> It'll drop about 4 volts at 12 amps over that length, but that
>>>> shouldn't
>>>> worry a fan much.
>>>>
>>> You could use #14, but there will be a lot of VD at startup, ...
>>
>> How did you determine that, and how much, specifically, are you thinking
>> is "a lot" for a fractional hp fan motor???
>
> Not to nitpick but wouldn't a motor drawing 12 running amps (if the OP is
> correct) be in the realm of a couple hp? If I recall my 5 hp compressor
> motor draws around 12.
>
>
>>> #12 isn't all that much more expensive.
>>
>> That's true, certainly, and I have pretty much quit using 14, but if
>> it's a dedicated circuit I don't think there's a chance in the world the
>> difference would make any practical difference at all.
>>
>> If, otoh, there's a chance of wanting something else, that would
>> necessitate it in all likelihood.
>
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