Basic Electrical Question (240v TS + DC)

it will work. whether its code compliant is another issue. i run my 240 rikon 10-340 and Delta 50-850 on the same 20A circuit without incident. my subpanel is 30A.

-- there's a solution to every problem.......you just have to be willing to find it.

I believe it’s kosher per the NEC to run multiple 20A receptacles on one circuit. I know for a fact you can’t do that with anything bigger than 20A.

If the subpanel is close and accessible, you’d honestly be better off playing it safe and running another 12/2 wire to the new receptacle, rather than hanging a new one off the existing one.

I have a couple of those in my shop and they will work just fine.

-- Our village hasn't lost it's idiot, he was elected to congress.

Thanks guys -

I double checked last night and my subpanl has capacity for another circuit (double pole) and as I’m running the HF on that subpanel right now and it doesn’t trip, it should have plenty of capacity for the new circiut as well (since I will no longer be running the HF). My plan is to get the duplex receptical for now and then at some point over the next few months run the new circuit.

NEC rules for receptacles are pretty bunk when applied to a shop. I believe that under residential NEC rules, no 240V circuit is allowed to serve more than one utilization equipment device. I think that’s to prevent someone from using the same circuit to run a dryer and a heater, for example.

-- Woodworking from an engineer's perspective

I thought I had read that with regards to 30 amp circuits, but that 20 amp circuits were fine.

Either way, I suppose I can always wire in the duplex, then when I do run the second circuit, I can wire the single back in place.

CAUTION! That receptacle you linked to is a 20A 120V receptacle. Any 120V device with a standard 120V plug will plug into it without a hitch. Till you turn it on! That’s when the sparks start to fly. The 250V rating on the description means only that it’s capable of a maximum of 250V without breaking down. Most 120V components are rated like this. Gear for 480V is always rated for 600V. Same thing. If you want to connect multiple 240V tools to one circuit, OK, but the receptacles need to be a design that 120V tools cannot be plugged into.

crank – are we looking at the same thing?

The one I’m looking at has 2 horizontal slits, one which also a vertical slit.

120v devices require 2 vertical slits.

Am I misunderstanding something?

crank – are we looking at the same thing?

The one I m looking at has 2 horizontal slits, one which also a vertical slit.

120v devices require 2 vertical slits.

Am I misunderstanding something?

- cochranjd

Nope, you have the correct receptacle.

-- Woodworking from an engineer's perspective

CAUTION! That receptacle you linked to is a 20A 120V receptacle.
- crank49

crank – are we looking at the same thing?
- cochranjd

It’s a NEMA 6-20, which is rated for 240V. Here are the NEMA plug configurations:

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

Personally, I prefer the twist-lock receptacles over straight-blade types. But, both the receptacle and the cord plug end are more expensive.

-- Woodworking from an engineer's perspective

OP, should be no problem doing what you want to do. I do like separate circuits for each machine, but it’s not necessary. When I wired my shop two years ago, I installed 7 separate 240V tool circuits—Planer, Dust collector, Table saw, Air compressor, welder, shaper, spare. I was unsure of exact location of TS, shaper and the planer, so two of the 30A circuits had two different outlets each, about 10 feet apart, The electrical inspector had no issues. I used twist lock receptacles. I created twist lock to standard 240V plug pigtails for several machines. Others, I just changed the plug to twist lock. If not familiar with such stuff, be sure to get a pro to help you. When I upgrade to a larger jointer, I’ll likely have to share one of the circuits. The spare is not in the right location…

-- Murphy's Carpentry Corollary #3: Half of all boards cut to a specific length will be too short.