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Power mains question: wire gauge

I've never seen a 240 volt compressor it a 1/2 HP motor 2 HP is common, and go on up as the capacity increases. A local business recently switched from multiple 2 HP 240 VAC 60 gallon compressors to a pair of 480 VAC three phase units with 120 gallon tanks that are set upi to run their entire production line from one unit. It was the old EDCO factory that Emerson closed a few years ago..

Cheaper? When did yo go over to the 'Do it any way but right' side?

It's not cheaper when the extra labor and increased material costs are added for doing the job more than once. If you didn't size the conduit for more wire, you'll have to rip it all out & start over.

Then there's the cost of a bribe to get the inspector to look the other way.

Reply to
Michael A. Terrell
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Well, then why stop at #6? Run 3KV and a distribution transformer. You never know.

Reply to
John Larkin

HAHAHAHA- maybe even ask power company for special purpose tap off the nuclear core...

Reply to
bloggs.fredbloggs.fred

Who uses 3KV?

Reply to
Michael A. Terrell

I've seen a *lot* of 1/2HP motors used for power tools that can be wired either way.

Rather irrelevant.

I always do it the right way. The "right way" depends on the situation. I guess the "right side" is universal, though, but it's also right.

It's a *lot* cheaper. #6 is a PITA to work with. No thanks!

Now you're throwing in random costs.

Reply to
krw

OK, 300K.

Reply to
krw

No, DaveC, the first sentence of your original post is:

"Air compressor 1/2 hp motor rated 220v (2-wire, not 3-phase) @ 15A. Distance from load panel ~100 ft (as the conduit runs)."

That reads 1/2 hp to everybody but you, I guess.

Reply to
John S

at

I'm not buying 3.1HP, either. Has anyone ever seen a 3.1HP motor? This *has* to be a troll. Maybe one of Bopal's sockpuppets.

Reply to
krw

Bill explained :

The supply voltage has no bearing on the voltage drop. Only the wire size, the wire material, the run length (there snd back) and the load current affect the voltage drop in any line.

The supply voltage is required in those calulators only to allow the calculation of the percentage drop from the original supply not the actual volts lost.

--
John G
Reply to
John G

How about run what you need now with a pull string included?

Reply to
Tom Biasi

Inside your home? Or where you work?

Reply to
Michael A. Terrell

On an air compressor?

Reply to
Michael A. Terrell

Sure. Most small fractional horse induction motors can be.

Reply to
krw

I think we have a winner!

Reply to
krw

Hey, you never know how big of a compressor you might need.

Reply to
krw

100 feet of AWG 6 will set you back some C-notes. That's an expensive investment if you don't need it.

Rick

Reply to
rickman

What utter idiot suggested #6?

Reply to
SoothSayer

It's also a sweaty PITA to pull.. ( I ran some to a manly (for single phase) compressor and kiln).

Best regards, Spehro Pefhany

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Reply to
Spehro Pefhany

a larger compresser is likely to have a soft start where the pump compression is releived come on until it's up to speed.

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Reply to
Jasen Betts

a larger compresser is likely to have a soft start where the pump compression is releived until it's up to speed.

--
?? 100% natural
Reply to
Jasen Betts

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