I’m just gonna say 12. Twelve amps for sure...
Not enough information for that statement.
A separate 15A circuit at the least. If you have the option, 20A.
You will NOT be able to run your saw and a dust collector on the same circuit.
Figure out your dust collector system first, then figure out the electrical needs for the dust collector.
I strongly recommend using some sort of cyclone dust collector.
Read up about woodworking dust collection and cyclones starting here and read through the rest of his site:
https://billpentz.com/woodworking/cyclone/beginnnerscorner.cfm
Check here:
https://billpentz.com/woodworking/cyclone/dc_basics.cfm#CFMRequirementsTable
Your dust collector system will NEED to be on its own electrical circuit.
Any dust collector big enough to work semi-well (even on just one woodworking machine at a time) will be several horsepower worth of electrical motor running the blower.
No, a 'shop vac' will not really cut it.
The jointer and planer make lots of chips and shavings, the router spews sawdust, it will be rather difficult to collect the saw dust from the radial arm saw, the lathe also usually make lots of saw dust and shavings, but once you can rig up the dust shrouds you will probably be best off at the band saw from a dust collection standpoint (the bandsaw blade isn't whirling at 100+ mph spewing the sawdust all over like the circular saw or the router).
You'll probably need 6" diameter ducting and a 3-5 hp blower running a 13" to 16" impeller.
Yes, that is what you probably do actually need.
Which means a 240V circuit to run the 3-5 hp motor.
Or run big fans blowing fresh air in and the fine saw dust out the door/window and wear an actual respirator.
They make 8 amp 120v duct collectors, abd 3 phase 40amp monsters ... And all in between.
What do you own???

Figure out your dust collector system first, then figure out the electrical needs for the dust collector.
I strongly recommend using some sort of cyclone dust collector.
Read up about woodworking dust collection and cyclones starting here and read through the rest of his site:
https://billpentz.com/woodworking/cyclone/beginnnerscorner.cfm
Check here:
https://billpentz.com/woodworking/cyclone/dc_basics.cfm#CFMRequirementsTable
Your dust collector system will NEED to be on its own electrical circuit.
Any dust collector big enough to work semi-well (even on just one woodworking machine at a time) will be several horsepower worth of electrical motor running the blower.
No, a 'shop vac' will not really cut it.
The jointer and planer make lots of chips and shavings, the router spews sawdust, it will be rather difficult to collect the saw dust from the radial arm saw, the lathe also usually make lots of saw dust and shavings, but once you can rig up the dust shrouds you will probably be best off at the band saw from a dust collection standpoint (the bandsaw blade isn't whirling at 100+ mph spewing the sawdust all over like the circular saw or the router).
You'll probably need 6" diameter ducting and a 3-5 hp blower running a 13" to 16" impeller.
Yes, that is what you probably do actually need.
Which means a 240V circuit to run the 3-5 hp motor.
Or run big fans blowing fresh air in and the fine saw dust out the door/window and wear an actual respirator.
thats a very helpful article Moon. Thanks. Makes me want to give up woodworking though!!!
I deliberately didn't link to Bill Pentz site - he is a little too extreme/over the top for most woodworkers, in my opinion
I only have a table saw, router, random orbit sander and a belt sander so I just use my shop vacuum and connect it to whatever I'm going to use. I just take the filter out every few years and clean it off. I have a replacement for it but I'll keep it until needed.This is for a home shop, probably a shop vac would work. One machine at a time and the machines are small home shop machines. 6" jointer, 1hp router, 6 inch planer, 12 inch bandsaw, 12" wood lathe, 12" Radial Arm saw (dont hate).
Only one machine at a time would be on. I would probably spend 15 hours a week in the shop. I dont foresee a lot of sawdust being made but I dont want to use a shopvac and have to change the filter. Ideally there would be a transparent plastic collector about 10 gallons or so that I can see the sawdust accumulating in and I would just easily empty it from time to time.
I would run a pipe along the wall with ports with valves for each machine.
Thanks Stuey and I really like your avatar btw.
I think you're on the right path, but need to read a bit more.
Do you want to capture all the dust, so you don't breath it, or capture the chips, so they are easy to throw away? If you're just going after the chips, it's cheap and easy. If you also want to get the dust, the price will go up.
1) The bag attached to the dust collector is just as important as all the other stuff. Most of them will pass 5-10 micron sized particles right back into the room. All the bags catch is the chips. They will not change what goes into your lungs. To get into a sub-micron bag or filter will cost a few hundred.
2) You can buy a 2hp dust collector from HF for $200, so don't be freaked out by the $2,000 pricetag of a nice system. It will have a bag that won't capture much dust.
3) 3M makes a great respirator for $20, and it uses replaceable filters.
You could be 99.99% protected (better than any dust collector) for well under $50.
4) Your planer and jointer will be the biggest offenders for making chips. They will fill your filter bag quickly, and would be helped by also using a cyclone. If you ignore those two tools (and sweep up the mess) you could easily get by with a shop vac for the other tools.
5) I've never seen a 6" planer. What is it?
6) You can vent your dust outside, depending on how close to your neighbor's house (or your house) you are. Since the dust collector moves a large volume of air, you may be emptying the room every few monutes if all the air is going outside. It would take a hell of a heater or AC unit to make up that air, and would probably cost a fortune.
7) Also look into air filters like this one.
https://www.amazon.com/dp/B00LPD9BDI/?tag=atomicindus08-20
They don't collect chips, but can help to clean the dust from the air. They do not remove air from the building.
For $25, yes
Try it, if it doesn’t meet expectations, you can add to it
Or go bigger. That’s what i use and it will work fine
You may have to replace the top bag if it’s nasty and clogged