Want longer cord for Delta TS

[Lew Hodgett]

That makes two (2) of us.

Lew

[Doug Miller]

No, it's not.

A 240V circuit looks like this:

(L1)---------+ | (load) | (L2)---------+

This is a series circuit. Current is the same at all points in a series circuit; thus, it's the same in L1 as it is in L2.

Bzzzt! Thanks for playing, though.

Only if it is mistaken for a great deal...

[Doug Miller]

Wrong -- it's 15A per wire.

It's a *big* problem on 14ga wire.

Whereas you are entirely wrong, but for the wrong reasons.

[Tanus]

Thanks for clearing that up. He had me confused when he talked about splitting the current too. I was locked in single phase thinking and it made no sense to me.

Tanus

[Max]

"Chuck Taylor" wrote

Max

[CW]

Are you trying for a laugh here or what? Does the word "circuit" mean anything to you? What, you figure that on a 120 volt circuit the juice just stops at the motor? The other side of the circuit (there's that word again) just lays there?

[The Davenport's]

Many other opinions have been expressed...some colorfully...howver, take this for what you will...

...I'm currently moving my equipment from my fathers shop to my own(finally) and I am running new circuits to the shop. They are 240v 20 amp for the table saw and the jointer. I tend to use very short cordsets on the machines...that is, no more than 12" from motor or cabinet to the plug...then run extension cord to the wall. In this case, I will be using

10ga stranded for both. Both draw no more than 10 amps running...about 14 amps on start up, so 12ga would likely work just fine, but I don't know what I may have in a year, so I'll still be set.

However, you 14-3 wire is not anywhere near large enough....unless you WANT to watch your wire melt before your very eyes! :>

Mike

[fireant]

Whoa. Ask a seemingly simple question . . . . which was what size power cord for a 25' run for a 3 HP 220V single phase tablesaw. Looked through Delta manual, and they recommend 14 ga up to 50'. Found a 12 ga 25' cord at WM which will cover my intermittent use. Thanks all.

[Doug Miller]

And your basis for this belief is -- ?

Let's be realistic, shall we? 3 HP is in the neighborhood of 12 amps at 220 V. That's not anywhere close to melting 14ga wire. Or the insulation on it.

[Pop`]

Hmm, OK, I see what you're at. I assumed the OP was a North American residential, meaning opposing phases of the 110 make up the 220 and thus each hot carries half of the total current rating. In the UK and other places, their 240 is indeed going to carry all the current of the rating since there is only one "hot" conductor plus the neutral. But at the same time, 240 @ xx Amps, well, that's a different story. Since the OP stated 220 and 15A, which is how NA power is stated, I suspect he is in NA. But, your point is taken and valid if he's in a different country.

Pop`

[Doug Miller]

I thnk all of us assumed the same thing about the OP's location. You're just wrong about each leg carrying half the current, that's all.

[Pop`]

220 @ 15A = 110@7.5 + 110@7.5 = 15A.

110 with 15A in each phase would be a 30A ckt; 30A delivered to the load.

ThiMk!

[Doug Miller]

Nope.

220V * 15A = 3300 W.

(110V * 7.5A) + (110V * 7.5A) = 825 W + 825 W = 1650 W.

Absolutely false. The currents are *not* additive. Two 110V circuits in series with 15A in each leg makes a 15A circuit at 220V. **NOT** a 30A circuit.

[Greg O]

Damn it! 12 gauge! Typing faster than brain functions! Greg

[Greg O]

Nope! Try again! These electrical questions that get answered by the cusless are fun!!! Greg

[Greg O]

I was assuming North America, and you are still wrong! Greg

[Greg O]

I would never have guesses that they would recommend 14 gauge cord for any length! The 3 hp motor must draw less amps than I figured. even though a 12 gauge cord is a good idea to help keep the voltage drop to a minimum. Any idea what the motor name plate states for amps? Greg

[Scott Lurndal]

It would have been more polite to tell him _why_ he was wrong:

scott

[Greg O]

Crap! make that "Clueless" Greg

[The Davenport's]

No...2hp is in the area of 12 amps. 3hp is going to be closer to 16-18, depending on the motor itself. I will say that it would have been better had the OP posted the amperage, but still, a 3hp table saw is gonna pull some amps.

And THAT is what I based my belief on.

Mike