I knew most of this, except for the part about 15 amp limits through a
conventional outlet. The new compressor was tripping my 15 amp breaker
when it got to about 120 psi. I just got my electrician friend to quote
me on rewiring my garage with duplex 20 amp circuits. Is there a special
outlet sold that can handle this?
220 service will come when I build my real shop. :)
My general thought has been that a motor that is rated for higher
horsepower will run cooler and last longer than one rated at a lower
power. The motor that came from CH is an Emmerson.
BTW, CH has given me no hassle about replacing the compressor with the
broken foot. I suspect it was shipping damage that I didn't notice when
I checked it over the first time. The foot was there, but it was
probably already cracked and then it flew off when I started using it.
My feeling of being cheated was in the oilless vs, oil bath issue. The
compressors I listed in yesterday's email were all oil bath types.
I've had reason to call CH on other occasions and have always been
treated efficiently and courteously.
>>Most 110 circuits are rated at 20A.
> Again not quite true. The familiar parallel blade outlet is only rated at
> 15 amps, and in most areas it's a code violation to install a bigger breaker
> than the outlets are rated for. I've never seen a home originally wired
> with a 20 amp 110v outlet.
> So, using the above numbers, we have 110v * 15a = 1650 volt-amps max from a
> standard 110v outlet. Since it takes (roughly) 1000 va to produce 1hp, that
> CH compressor probably does produce about 1.65 hp, which they conveniently
> round up to 1.7 true hp.
>> So to get a real 5hp
>>compressor the motor MUST run on 220 V.
> That I agree with !