Installing Three Phase Power In A Shop 

And as those heads fly they can break bones.

Hahaha...sounds like mine...Mr Rhodenizer wouldn't let the caretaker change the ceiling tiles with holes bcuz it was part of the demonstration! He'd step to the side and let a piece of wood fly up into the ceiling...he had our attention...rip Mr Rhodenizer...I love woodworking bcuz of your teaching

🎉 definitely I agree🎉 that is the kind of machine we used to use in school also where it almost sound like a two-stroke with a power band engine it would rim and then rim higher🎉.. kind of like a jet engine🎉..JJ... Jonjon...😊😊

I like to say that we think the tablesaw's job it to cut wood for us but the table saw resents it and will throw it back at us any chance we give it...come to think of it kind of like a strict Sensei or boxing coach shows you your weakness with a quick connect to your head. BE alert especially when cutting multiples. Do not say at the last "Ah, last one.". Your mindset changes and goes onto the next task but I have learned to say at the last one; one more after this, keeps me focused on the task at hand so I can keep my hand.

Well my shop teacher told us that if we broke a bandsaw blade, it would shoot across the room and get stuck in the cinder block. In reality, from experience, once the blade breaks it comes to an immediate halt and you don't even know you broke a blade until you open the cover.

Really 4 tons? Or are you exaggerating? That would be a BEAST!

Hairball😂

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Hell yeah

All Greek to me 🤷‍♂

You know what's funny to me, I've been around electricians my whole life. Done electrical myself some. I constantly think: "Well if HE can figure out or, I sure as heck can." And then I realize that electrical isn't my thing. The same look of astonishment that I give my electrician when he wired my whole house and it worked was the exact same look he gave me when his house flooded and I had to redo the drywall and plumbing. Things that he never had a clue or interest in. We both cover each other and it works. ❤

@@trentjensen96I I just took the master electricians contractors test in Ohio about 6 months ago. I’ll tell ya what it was super hard 110 questions but I passed. Been doing electrical work for 25 years and you never stop learning!!

What's a splitter? Same as a riving knife?

@@MattsAwesomeStuff Similar. A splitter is fixed whereas a riving knife raises and lowers with the blade. So you couldn't, for example make a partial cut with a splitter installed.

Wouldn't you be able to make that partial cut as long as you changed out a taller splitter with one that was short enough to 'duck' below the height of the blade height in question?@@andrewalexander9492

i agree

@@MattsAwesomeStuff essentially, yeah. Just can't go up and down since it will be a retro-fit.

Will lowering the speed control increase heat in motors at all?

@@slaveofjesus3878 The voltage and load stays constant, the vfd just changes the ac frequency (hz). Running a fan cooled motor slower will decrease the cooling though, so at really low speeds it can cause overheating (like 20hz or less which is 1/3 the regular speed). If someone needed to run a motor at 1/3 it's speed for long duration, they be looking at slowing the final output mechanically (different gearing / belt arrangement etc.) But if for some reason you have to you can install a separate fan too. It's not often that you want to drastically change speed for non-production work, you might fine tune the speed a bit, but the main purpose of the vfd is to give you that flexibility to run 3 phase loads on single phase. They're also useful for testing and prototyping or situations where the speed is tied to some other input (job being run, temp, load etc.)

​@@slaveofjesus3878to add to what @synpapticburn said, it is recommended to use an "inverter duty" motor. Inverter duty motors are insulated for those slower speeds. Also keep in mind a VFD does not output a sine wave like the three phase electricity that comes from the power plant. The VFD works by converting line AC voltage into DC volts. This "bus voltage" then goes through a series of devices called insulated gate bipolar transistors or IGBTs. Essentially they are electronic components designed to switch large voltages on and off very quickly. What they will do is on each phase, they'll turn on and off very fast, creating pulses of DC voltage on the output terminals. These pulses are designed to mimic AC voltage. They'll pulse very short durations when the sine wave is closer to zero, and then pulse longer and longer at the peak. Then another IGBT will open and do that same pulsing with a reverse polarity. This is usually good enough for "Dumb" electrical components like motors and transformers and will respond as if they were being fed true AC power. The VFD also allows for control of the IGBT pulsing so that you can run the motor at different frequencies. The trade off to this is that VFDs tend to put out a lot of radio frequency interference and sensitive electronics can actually be damaged or crippled by it. But you can sine wave filters, which are essentially specially built three phase isolation transformers, to convert that "chopped up" DC pulse signal to a relatively clean AC sine wave. Most don't though, since they aren't connecting sensitive electronics to it anyway. You don't need to do that if all you're doing is running your Bridgeport or your lathe with it.

8 months later i find this video, and im thinking this exact phrase to myself when they turn it on for the first time... I need to get some stickers.

@@OniRubberNinja I always upvote AvE

What does that mean please? I've never heard the term 3 phase

@@fdort3971 Three-phase power is a three-wire ac power circuit with each phase ac signal 120 electrical degrees apart.

On household power you have 2 hot leads (black and red) which are 230v from black to red and 120v hot to neutral. This is single phase. On 3 phase you have 3 hot wires (example red, black, orange) and again 230v hot to hot and 120v hot to neutral. First phase is black to red, second phase is black to orange and third phase is red to orange. This is much more efficient than single phase. In fact all brushless battery tools are DC converted to 3 phase AC.

@@l.george7517 thanks!

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-mUXLxK_zI24.htmlfeature=shared

Exactly! They can still spit out material under a guard, too. I don't know if it's possible to avoid all risk.

It may be difficult to mount a riving knife, maybe impractically difficult. Adding a splitter may be easier, if not quite as versatile and safe.

Any table saw can cut your hand off...do not be fooled by those little jobsite saws. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-XcG71T5Fs6M.html

"240" and 208 can both be a part of 3 phase. "neutral" is just 240v tapped midway on the transformer windings to halve the voltage. For single phase 230 for example you have two conductors with between 220 and 250 volts between them (it can vary). For 3 phase you have 3 conductors, and yes the pulses are out of phase with each other. So you always have that 230ish volts between any two of the three wires. But you can also have a "high leg" which will give you 208v relative to ground. So on a 3 phase breaker, you can connect a regular single phase load to the top and bottom of the 3 breakers and get 230ish volts to run regular equipment. This is all better learned visually though, there are some great entry level brief vids on youtube about all this, it's interesting. Another fun thing is that 3 phase motors can reverse direction. If you hook it up and it spins the wrong way, you can reverse any two wires and it will turn the other way. 120v 3 phase with 208 isn't something I see a lot, but it's apparently used more in schools and apartments etc. In an industrial environment I see 230 v 3 phase or 480v 3 phase most of the time.

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That's a pretty common misconception. US homes receive 240V, and most homes built in the last 40 years have 200 Amp service, providing 48 kilowatts of power at our disposable. The 120V circuits everyone likes to poo-poo are simply wired to half the transformer to provide a smaller voltage potential, but every home gets a hot leg from both halves. Combine the two, and boom, you've got 240V to power heavy loads like ovens, clothes dryers, water heaters, etc. The youtube channel Technology Connections has a pretty good explainer.

Hmm, it is not about 120V/240V and the amps, thats enough for most uses for sure. The real difference i wanted to point at is the 3 phase system. So You can connect a three-phase motor withut anythng in between. And this has a lot of advantages, no capacitors, nor carbon brushes that wear out and cause radio interference, quieter running and as far as i know better efficiency... Have a lot of them here, water pump, drillpress, saw, planer,...@@rhekman

What? 👂

@@michael-michaelmotorcycle I CAN’T HEAR YA, THE SAW’S TO LOUD!

Chest guard wise move. Know a guy who ruptured a spleen on kickback. He lived to tell the tale.