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-   -   compressor 3 phase in my garage ? (http://www.hotrodders.com/forum/compressor-3-phase-my-garage-184150.html)

Vincentnova 09-09-2010 04:11 PM

compressor 3 phase in my garage ?
 
hello
i'm wondering if there any chance to put in my regular garage with 110 volt
an air compressor 3 phase type industriel ( i saw some good deal on craigslist )
i need to get a good compressor , no just for a few work , but for a lot of work .
if it's not possible to put a 3 phase in my garage could you tell me a good compressor with 110 volt

i need a compressor for : body work , mecanic work , and paint job

thanks a lot guys for your futur answer

S10 Racer 09-09-2010 04:29 PM

You can not run 3 phase equipment on single phase power. You can buy a phase converter to convert single phase to 3 phase but there are alot of good quality, single phase compressors on the market so to me it wouldn't be worth the extra cost for 3 phase. Speedaire makes one of the best compressors.

Vincentnova 09-09-2010 05:00 PM

how much coast a phase converter ?
may be it will be cheapest to buy one air compressor used and one phase converter than a brand new speedaire 110 volt ( i never see one used for sell )
with a phase converter do the aire compresser lose hp?

S10 Racer 09-09-2010 06:02 PM

Quote:

Originally Posted by Vincentnova
how much coast a phase converter ?
may be it will be cheapest to buy one air compressor used and one phase converter than a brand new speedaire 110 volt ( i never see one used for sell )
with a phase converter do the aire compresser lose hp?

If you are wanting to use the compressor for auto body air tools, you need a 220 volt unit. Body tools and impacts use alot of air that most small 110 volt compressors can not keep up with. You need to be looking for a compressor with a 2 stage pump and 220 volt. There are different phase converters (Rotary, Static & Digital) and they all vary in price dependent on the application and HP requirements. To me it would be more trouble than it's worth. Keep it simple.

oldred 09-09-2010 06:08 PM

First a simple phase converter will not work with 110 you must have a 220 volt single phase power connection to power the converter. There are two types of converters, the cheaper (about $175 to $200) static type that will run a 3 phase motor ok but it will only let it produce 2/3 of it's normal power and that don't work well for a compressor. The second type is a rotary type converter that uses a capacitor bank and another 3 phase motor of approximately equal power to the biggest motor it will be powering and these work quite well, they do however cost about as much as a good single phase compressor! The static type can be connected to a separate 3 phase "idler" motor sort of like the more expensive rotary types and then it will let the work motor produce near full power but the key words here are "near full" power so again not a good set-up for a compressor and it is going to be a lot of trouble and expense.


Another way would be a VFD frequency controller that could be powered from a 110 source but these too cost as much as a compressor and I doubt you could find one big enough powered by 110 to run a decent compressor.


Long story short, forget trying to run 3 phase equipment from a 110 power source! Also for what you are wanting to do you probably will not find any 110 powered compressor that will satisfactorily do what you mentioned so you really need to first get 220 run into that shop then get a 220 volt single phase compressor.

Vincentnova 09-10-2010 10:26 AM

do you think a air compressor with 60 gal its enough for work on my car include a paint job ?

oldred 09-10-2010 05:39 PM

Gallons has little or nothing to do with it and there are 40 "gallon" compressors that would do the job just fine and 60 "gallon" models that would not work well at all. Forget about the size of the tank, look at the CFM rating because THAT'S matters! Use the search function to a search on "air compressor" or maybe "CFM" and you will find tons of info on just what you are looking for since this has been covered in detail literally dozens of times.

CFM is what determines whether a compressor will keep up or not and phony HP ratings and huge oversized tanks have caused a lot of people to end up with something that will barely do the job because the CFM was low, HP ratings mean next to nothing and a bigger tank does NOT make a bigger compressor!

JohnnyK81 09-11-2010 05:51 PM

Yup, but first thing is first, you're going to need to run a 30amp (At least, but good for 5hp) 240 volt breaker to the garage. Otherwise you're not doing anything.

Vincentnova 09-13-2010 05:35 PM

thanks a lot for your answer guys
now i have one more question

with one air gun spray , can i do everything ? primer , paint and clear ?
or i need one guy for each action ?

oldred 09-13-2010 10:47 PM

Base and clear can be sprayed with the same gun but you need a separate gun for primer, you don't want primer in your paint gun besides the primer gun needs a much larger tip than your paint/clear gun.

Vincentnova 09-13-2010 11:23 PM

can you give me a selection of good guns not too expansive
my goal its paints cars , no only one ....
i dont want after 4 months buy another guns because the first were just simple
thanks

oldred 09-14-2010 08:14 AM

If you just plan to paint one or two cars then get the HVLP "purple" gun from HF but if you want a gun to use regularly, and one that will last, get an IWATA or Sata but these can be pricey. They do a REALLY good job and the price (around $400) will be off-set by the paint they will save, the cost can actually be recovered in as few as 3 or 4 over-all paint jobs when using a quality paint. Even using the cheaper grades of paint you will still recover the cost in a fairly short time. You can find guns that will do a fantastic job (The Harbor Freight gun for example) of laying down the paint for less than $50 BUT these will make a lot of expensive over spray which will result in you spending the same amount of money in a short time that you would have if you had of bought the good gun-but you still will not have it!

Vincentnova 09-14-2010 02:17 PM

do i need a expansive spray gun for the primer too ?

can you give me the goods references for a iwata or sata for the basecoat and clearcoat , and another reference for a spray for the primer ?

vicrod 09-15-2010 02:55 PM

One more thing to be considered is the ampere requirement for the compressor motor you get.

Motors up to 1hp can be connected to a 20 amp, 120 volt outlet as long there is no other load on the circuit.

Any motor above 1hp will need a dedicated circuit to power it.

The ampere load of a 2hp single phase motor connected to a 240 volt source is 12 amps at full load. 25% must be added to the 12 amps to determine wire size. #14 wire is rated at 15 amps under normal conditions.

A 3hp motor is 17 amps. #10 wire.
A 5hp motor is 28 amps. #8 wire.
A 71/2 hp motor is 40 amps. #6 wire.

The ampere load of your motor could vary from the above.

Also the capacity of your main service panel needs to checked to see if the motor load can added.

vicrod


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