How to Upgrade a Table Saw from 110V to 220V

Hi everybody, I’m Mike McCrory and this is
Wood U Make It. I know that most table saw motors can be converted
from 120V to 240V and that has a few advantages. As many of you have probably experienced at
least once in the past, You may have tripped a circuit breaker or
blown a fuse when cutting into something that’s heavy or if the wood binds into the table
saw blade So, I want to avoid that, especially because
my table saw is plugged into the same circuit as the overhead lights. So, when I blow a fuse, the lights go out,
the garage doors are closed — that’s kind of scary! To convert a motor, it’s relatively simple.
I’ve already got the garage wired for 240V because of my band saw. So, all I need is a plug and some wire. So, let’s get started! [theme music playing] So, before I start doing any re-wiring, let’s
just run a little test. I’m going to mark a line on this shim and
I’ve got it wedged into the table saw blade and I’m going to turn it on. [sound of the motor trying to start] You can see that it wouldn’t start. And also the lights dimmed. I don’t know if you could see that or not. So, hopefully by upgrading to 240V, I’ll have
more power at startup. The blade will start spinning faster. Even though I won’t have more power overall,
at startup I can have some advantage. So, let’s go around to the back, open up the little wiring compartment on the
motor, and we’ll get out the manual and follow the instructions. So, before you get started, you’ll have to
make sure you have all the right tools and pieces you’ll need. The most important thing to consider is the
240V plug. There are different types of these, and they’re
designed for different amperages. So the one that I have is a 20A twist-on plug. They have some that just have straight plugs;
you just push them in. They have 30A plugs and they’re not interchangeable. So, what’s really important is that you start
with your outlet if you already have one. Make sure that the plug you purchase is going
to fit into that outlet. A 30A plug will not fit into a 20A outlet,
and vice versa. So, I’ve got these matched up — this is a
20A plug, 250V. That’s the other thing to be careful of when
you’re buying these in the store. These are right next to the 20A twist on 120V or 125V
plugs. They’re not the same. They have different
twist-on connectors. So you want 20A 250V or 30A 250V depending
on what type of plug you have. So the other things I have are my manual with
the instructions. Here’s the 120V circuit and the 240V circuit. I’ve got my wire that I’ll use to make my
new cable to go from the saw to the outlet. I’ve got a box of Marrettes. I’m not sure
that I’ll need these. These are Marrette connectors or Wire Nuts. I’m not sure that I need these but I’ve got
them handy just in case. I’ve got some black electrical tape that I’ll
need and a screwdriver to open up the compartment. So here’s my motor at the back and I’m just
going to unscrew this screw right here. One thing to keep in mind — and this is really
important — What I’m about to show you is only for this
table saw — this model of table saw. This is a Ridgid TS3650 that I have. The instructions for your motor may be somewhat
different. Doable, but different. So be absolutely sure that you follow the
instructions in your manual. Let’s start by opening this electrical compartment. I’m going to make sure the table saw is unplugged, Which it wasn’t. Now it is, so we’re safe. I’ll unscrew this. Open it up. And, surprisingly because this is an enclosed
compartment. Surprisingly it’s full of dust. So, the first thing I’ll do is I’ll clean
it out with my air compressor. OK, just a couple of quick blows. [blasts of air] So, we’ve got four different connections,
but a whole bunch of different colors of wires here. So, it’s pretty simple to just follow the
instructions. So, right now, because I’m on 120V, I’ve got
white, white, and black connected. when I move that to 240V, I want to have
just white and white connected and I want to move the black one over to
the orange wire. So, let’s take off the tape. I’ve got white and white. So right now it’s
white, white and black. That needs to change to be just white and
white. I’m going to remove the black one and reconnect
the white and white. Now the black one has to be connected to the
yellow wire. The yellow is currently connected to brown. The brown is going to end up being just terminated
and not connected to anything So black and yellow. And, I’ll connect that up. And red and orange are going to stay the same. So, I’ll will need one additional Marrette
connector. I mean, it’s not absolutely necessary, but
I think it’s safe to just put a connector on the end of the brown wire. And now, I will tape them all up. Everything is taped up, it’s clean. Let’s
go ahead and close the compartment back up. Put the screw back in. Alright. Now we’re half way there. The next step is to come around to the front
of the table saw where we have the switch, and that’s where the cord that plugs into
the wall is connected. So, I need to remove this plug and wire in
the new wire that I have (the new cable), put a plug on the end of it, and then we’re
going to plug it into the wall, and test it out. I’ve taken the switch off the fence guide. That’ll make it easier to work on. I’m just going to open it up with the screw
here. Here’s the wire that comes in. It’s got two wires: black and white, and green
for ground. Because I don’t have any of these types of
connectors — actually I’ll check my tool box to see if I do — But if I don’t, what I’ll do is I’ll snip
the wires here and then I’ll use the Marrette connectors
to twist on the new cable. That should be fine. So, I checked my tool box and I do, in fact,
have some of these connectors, But they’re only sized for up to 14-gauge
wire, and I’ve purchased 12-gauge wire for this cord. So, I won’t be able to use these. It’s not
worth going to the store for just that, so I’m going to proceed with the Marrette
method that I talked about — connecting the two wires together — the existing wire that was already there with
the connector to the new cable with the Marrettes. This little plastic compression fitting was
not that easy to get back in because the fact that I’m using 12-gauge wire But with the assistance of my water pump wrench
to compress it and to squeeze it through, I was able to get it in successfully. So, now I’ll strip the wire and do the connections,
and… then we’ll plug it in. So, the switch is reconnected and reinstalled
on the fence track So, now we’re going to connect the plug to
the other end. A little piece of advice based on me making
the same mistake many, many times over the years… Make sure you put the back piece — the cover–
for the switch onto the wire first Otherwise, it’s hard to get it on after you’ve
connected it. Don’t forget to put this piece on too. OK, so, ready to go. I’m going to go and plug
it in. First, we’ll give it a test run just to see if
it works. [sound of the saw running] [sound of saw slowing down] It came on fine and the overhead lights didn’t
dim for the first time ever. So let’s put this piece in and give it a try. [sound of the saw running] You can see the difference. So, that piece was wedged in exactly the same
as before. [sound of saw slowing down] And even though I don’t have any more overall
power while the motor is running, it definitely starts up a lot faster and a
lot more powerful. So, that’s going to be a real benefit now. I’ve read on the Internet that anybody who’s
gone to 240V never wants to go back. So, I’m really happy that I’ve done this.
I’ve used 240V saws before, but I’ve never converted one. So…..pretty easy. Would YOU do it? [theme music playing]

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36 thoughts on “How to Upgrade a Table Saw from 110V to 220V

  1. Just came up on the video and good demo on the method and the effect of going from 110 to 220/240V. Not sure if all the contractor type saw motors are convertible but like you said, sure to check the manual. Also I am a bit surprised as to why you need a much thicker gauge wire since doubling the voltage you are going to draw 1/2 the current for the same wattage rating. Since the power loss in circuits is related to the resistive heating (I squaredxR) , the higher voltage inherently suffers lower heating loss. You don't always need a higher gauge wire for the same wattage appliance. Rama

  2. Hi from Belgium ! You have a very interesting channel, keep on going !Does every 110v motors can be switched to 220v ?  Here in Europe, we have 220v and some tools you have in the US can't be found in Europe (or very expensive), so it would be interesting to buy US tools and convert them with 220v.Thanks in advance for your response.By the way : Happy new year ! :-)Stephan

  3. Really enjoyed the video and your explanations through out. One small question in regards to the new plug wire. Was that just being overcautious?

  4. I'm about to pick this same exact saw up in about 10 minutes and want to go 220V from the very start. What sizes breaker in the panel is your 220 outlet hooked up to?

  5. I want to do the same thing but I just can't decide if I should put it on a 15 or 20 amp breaker. What size breaker did you use and have you tripped it at all since moving to 240?

  6. hola soy de chile y queria preguntarle si el modelo ridgid 4513 tambien se puede convertir a 220v de antemano gracias

  7. Hi. Probably a simple question; but wouldn't you need to swap out the wires for a higher gauge as well?

  8. Thank you for posting! I think you may have sold me on the 240v conversion. I am currently build a new shed/shop and think a separate circuit for each of my hefty tools @ 240v would be the best bet. Thoughts?

  9. Im going to swap out a 110v motor on an old table saw with a 220v motor. My question is the switch on the saw able to be used with the new motor? or do I need a switch that works with 220v?

  10. Hi mike, greetings form Sri Lanka! Im planing on purchasing a DeWalt DW745 Table Saw (120 volts) from Canada. Here in sri lankan the voltage range is around 220 and 240 volts. I'd like to know if it's safe to use a stepdown 3000 watt transformer? Hope to hear from you soon!

  11. And now you can upgrade to 400V. 🙂
    But then u need 3-phase-400V in your garage and a new Motor.
    No. Just kidding. Interesting to see, that some motors 100 and 220 Volt kompatible.
    I didn't' knew this.
    Cheerio from Germany (working with a 400Volt tablesaw)

  12. Thanks, but I am well acquainted with that OH CENSORED mistake with the back of the plug myself. Did it again just last week.

  13. Great video. Currently working on turning my garage into a woodshop and trying to avoid the breaker tripping issues I've experienced in my friends garage. You mentioned the lights didn't dim when you fired up the saw on 240, but isn't it on a completely different circuit? Wouldn't it have also not affected the lights on a separate 110 circuit as well? Or is it possible to have 110 and 240 outlets on the same circuit?

  14. I'm looking at buying a 120V Grizzly saw. It has the ability to convert to a 240V, so that is what I will most likely do. Thanks for the video.

  15. @Wood U Make It: at 04:52 – I don't get it why so many people prefer to spread the dust everywhere instead of vacuuming it..

  16. Hello, do you know o heard if dewalt table saw dw745 could be rewired from 120 to 240v ? cause i cannot find anyone done that. 🙂 and usa dewalt is kinda 3 times cheaper than european version 😀

  17. Couple of things I'll add to this:

    Motors in the US are wound for 60Hz motors in Europe are wound for 50Hz.

    A discussion of what happens is here:

    It will decrease motor life. But a table saw is not used in continuous duty so most likely it won't make any difference in this application.

    Now as for the advisability of doing this change:

    The big problem with consumer table saws at 120v is the wires that feed them (including the power cord) are NOT sized properly. To properly feed most consumer table saws on 120v you must run at least #12 awg copper wire from the saw all the way to the panel. On a dedicated outlet. And that is if you are practically on top of the panel. If the panel is at the other end of the house and you have a 50 foot extension cord on top of that you really need #10 AWG on a 30A 120v circuit. If you don't want to convert your saw (or can't) then you can replace the power cord and have a separate 20A or 30A circuit run to it depending on how far it is from the panel.

    THE BIGGEST BENEFIT IN THIS VIDEO IS THE DEDICATED CIRCUIT. In comparing a properly sized circuit at 120v vs 240v you will see little difference in power at the saw blade.

    However, you WILL see the motor run cooler at the higher voltage and there will be less internal winding loss in the motor. Windings in a motor cannot be made out of 12 awg or 14 awg. or the motor would be the size of a car engine. So the motor windings heat up and that heat energy is lost power. At 240v the current running through the motor is halved and so the motor runs cooler and as a result loses less of the power to heat. This also lengthens the motor life.

    This conversion can also be done to drill presses and indeed it can be done to anything that uses a motor that is wired to be convertible. And virtually all AC motors used in these tools can be converted.

    Most AC motors have a circuit diagram in the cover plate of where the wires go into the motor that shows how to switch them from "low voltage (120v)" to "high voltage (240v)" They have been made like this for almost a century. And even the ones that don't and don't bring the windings out for conversion can be opened and converted by a motor rebuild shop.

  18. thanks, just recently bought an older Delta Table Saw and it does have the ability for conversion, I can't wait to put this video to use. Finally breaking down and building my wife's dream cabinets and bookshelves for the living room she's always wanted, so I'm sparing no expense (sort of) to get the right tools for a great job. The Delta is the first step and doing a little rehab on it before the main job is one of my plans and this video should be pretty helpful

  19. So…you “upgraded” the supply wire to 12ga, but not the wire between the switch and the motor?..or did I miss that?

  20. For the same power, when you double voltage, amperage drops in half. Wire gauge is usually related to amperage rating. I do not believe the 12 gauge wire is necessary or beneficial.
    I am planning to upvolt delta.

  21. Know it's been a while since this was posted.

    For those saying you are doubling your voltage but halving your amperage so you don't need higher gauge wire.

    Circuit breakers and wire gauges aren't set for ideal situations when everything is working as planned. They are set for when things go wrong. Say something in the motor for the saw breaks or a small piece of metal falls in at just the wrong place. Everything appears fine but now the saw is drawing 19 amps while sitting unused. The fire that burns this guy's house down will have started at that 3 inch run of 14 gauge he spliced his 12 gauge wire on to because that 14 gauge can only handle 15 amps, the remaining 4 from the 19 being drawn is going to turn into heat.

    If wired correctly there is no danger of fire. It will just sit there quietly drawing 19 amps until it breaks all the way.

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