Want longer cord for Delta TS

[Marv]

This is from a google search.

Marv

The general rule of thumb for picking wiring size is · 14-gauge wire is rated for currents up to 15 amps. Circuits in many homes, especially cost-conscious tract homes, use 14-gauge wiring in most of the house except the kitchen; even in the garage. This is a distinct disadvantage nowadays due to hair dryers in bathrooms, computers and other equipment in bedroom/home offices, etc. Avoid 14-gauge wiring in any new home if you are building.

· 12-gauge wire for currents up to 20 amps. But a 20-amp breaker must not be loaded above 16 amps of continuous current draw. This is adequate for most home shops, provided your bigger tools operate on 240-volt power, and you don't have multiple tools going at the same time. · 10-gauge wire for up to 30 amps, or 40 amps if you are running intermittently loaded motors such as on a table saw or jointer that is not being used for big production jobs or jobs where you are doing a lot of continuous cutting. With intermittent loads, you can use 40-amp breakers, because a 40-amp breaker should not be loaded at more than 32 amps continuous. Just be aware that you will have more heating in the wire, so it be as open to ventilation as possible. It shouldn't be buried under the insulation in an attic, for example, between the breaker panel and the plug in the wall. 10-gauge wire is rarely used on 120-volt circuits.

[Lew Hodgett]

fireant wrote: > Want to replace current 10' cord with 25' cord. > Is 14-3 large enough? >

I'd buy a 25 ft, 10-2 /w/ ground molded cord set, chop off the receptacle, wire it into the saw, get a beer and admire your handy work.

What you save buying the molded cord set pays for the beer.

Lew

[fireant]

Want to replace current 10' cord with 25' cord. Is 14-3 large enough?

Saw is 3 HP 220V. TIA, F

[Mike Marlow]

I'd go with 12-3. Some might recommend 10-3 but I don't believe it's necessary or even beneficial for that length of run. 12-3 will be quite a bit more manageable in size than 10-3. Just go buy an extension cord at the local BORG, and chop off the receptacle end, and wire that end into your saw.

[Wayne J.]

Depends. If you are going to stay within the 25' then I'd go with 12 guage. The surge of a starting motor draws more then you think. 10 guage would be nice if you are even thinking of needing an extension cord. Either way, 14 guage is too small.

I know they wire houses with it, but 14 guage braided copper in a cord is just not as safe for long distances.

[Greg O]

3 hp equates out to about 15 amps at 220 volts. You will be pushing a 14 gauge cord. 12 gauge will do it just fine. 10 is over kill for 25 feet. Greg

[Charley]

A 3 hp single phase 220 volt saw motor will draw about 17 amps full load, which is already more than 14 ga wire is rated for, but the starting current of that motor can be 150% or more of the full load current, so a 14 ga wire is WAY TOO SMALL. You should be looking for wire that will carry more than

25 amps. A 10 ga wire is the right choice for a relatively short cable, but you should go to an 8 ga wire if the full length of the wire from the breaker panel to the saw will be longer than about 100 feet.

[Wade Lippman]

12 is adequate, but 10 is prudent, especially if you are a distance from the breaker box.

[Leon]

I would stick with an extension cord rather than attach a 25' cord directly to your saw. It will only work with the saw if you attach it.

Something to consider, while many have stated that the 12 ga. will work fine, If you go 10 ga. you can use it to also power those larger pieces of equipment you may get in the future. I run a 4.5 hp Laguna BS on a 10 ga. Too big is not a problem, too small will be.

[todd]

To be absolutely safe, I would recommend a 4/0 AAC. Never mind that it's larger than the 15kV distribution conductors.

todd

[Pop`]

Why did you waste your time with that?

[Pop`]

Well, 12 would likely suffice very nicely, but 10 is better of course from a heavy load viewpoint. Personally I'd probably just use a good extension cord; all that cord might not be necessary someday and then you'd be looking at cutting it off.

Pop`

[Pop`]

At 220, that's only 7.5A per wire; NOT much of a problem. YOu're mostly right, but for the wrong reasons.

[Pop`]

You are completely neglecting that the total current, on a 220 line, is split between the conductors, meaning you're all wet here. Jeez, a little knowledge is a dangerous thing. Even your 150% number is way off.

[Chuck Taylor]

To fireant: If you have any question which of the above replies is more "all wet", by all means find and ask a local licensed electrician. The probability of gleaning coherent, accurate electrical advice from this thread has officially begun its dive toward zero.

To power my 220V machines, including my 3 HP Unisaw, I use a 25' extension cord made from 10-2 w/ground.

[Greg O]

You want to re-think that? I think you are mostly wrong! Where did the 7.5 amps per wire come from?? Keep in mind that I deal with 220 single phase, 208 and 480 three phase on a daily basis. I am sticking with my 20 gauge wire for the 25 foot run. Greg

[Greg O]

I am think you need the towel, Pop! Greg

[Greg O]

[J. Clarke]

You're confusing 220v single phase with 3 phase. In single phase 220 the current is no more "split between the conductors" than it is in 110v single phase. 17 amps goes out on one, comes back on the other, the direction reverses 60 times a second.

You're right that a little knowledge is a dangerous thing. Let's hope you don't burn anything down before you acquire more.

[J. Clarke]

Did you really mean to put 20 gage there?