Wattage for 220v 20a outlet

[JazzBlueRT]

I am looking at a new heat press which is 2800w. I cannot get another 25 or 30 amp outlet installed for the 110v version. It also comes in a 220v version. Will my 220v 20amp circuit power the 2800w press? Am I safe on the 220v 20a up to 4400w?

 

[matt_i]

In general "pressure" * "flow" = "power" if you get the right units, which works for both mechanical and electrical systems.

So your 240vac * 20A = 4800W. You can only use 80% of the circuit's ampacity for constant resistive loads, so practically its more like 0.8 * 4800 = 3840 or 16A.

 

[mikedodge]

I've never seen it explained that way before using mechanical principles but he's right.

 

[JazzBlueRT]

Thank you

 

[nadogail]

If your numbers are correct, a 2800 Watt load on the 20 Amp Circuit Breaker will be easily handled.

 

[Terry D]

2800 watts@ 240 volts is 11.7 amps

Fixed industrial process heating equipment is considered a continuous load, so the circuit can only be loaded it up to 80% of its total amperage. So a 20 amp circuit can be loaded up to 16 amps

It will will be fine on a 240 volt 20 amp circuit

 

[JazzBlueRT]

2800 watts@ 240 volts is 11.7 amps

Fixed industrial process heating equipment is considered a continuous load, so the circuit can only be loaded it up to 80% of its total amperage. So a 20 amp circuit can be loaded up to 16 amps

It will will be fine on a 240 volt 20 amp circuit

Thank you.

The merchant says the machine can be used with either 110v or 220v. Is that possible?

 

[Terry D]

Thank you.

The merchant says the machine can be used with either 110v or 220v. Is that possible?

Are you sure they mean the same machine. Its two different plugs, unless it is hardwired, plus the heating elements would have to be wired differently to get the same amount of heat. Plus it would be twice the amps on 120 to get the same wattage

On a resistive load: Wattage/Voltage = Amperage

 

[mikedodge]

It might be possible. Some normal heaters and welders can be wired to work on either voltage. See if you can find a pdf of the manual.

 

[FredWanaker]

there are wiring and cord changes for 110V or 220V. They don't come with both plugs attached. You need a manual to configure the voltage.

 

[JazzBlueRT]

Are you sure they mean the same machine. Its two different plugs, unless it is hardwired, plus the heating elements would have to be wired differently to get the same amount of heat. Plus it would be twice the amps on 120 to get the same wattage

On a resistive load: Wattage/Voltage = Amperage

IIRC correct older computer power supplies had a slide switch 110/220v and some Dell servers had an auto-sensing power supply that could be used on either a 110v or 220v circuit.

This is a Ebay seller and before I drop $600 on it, I need to make sure. Have contacted the seller to clarify.

 

[Terry D]

IIRC correct older computer power supplies had a slide switch 110/220v and some Dell servers had an auto-sensing power supply that could be used on either a 110v or 220v circuit.

This is a Ebay seller and before I drop $600 on it, I need to make sure. Have contacted the seller to clarify.

But there is heating elements involved here. To get the same amount of heat from 120 to 240 volts doesn't seem as simple as sliding a switch.

 

[Metal-Marc]

But there is heating elements involved here. To get the same amount of heat from 120 to 240 volts doesn't seem as simple as sliding a switch.

It's possible. If there are two identical heating elements inside whatever OP is buying wired either in series or in parallel, you could just switch from 120V to 240V very easily.

 

[niget2002]

But there is heating elements involved here. To get the same amount of heat from 120 to 240 volts doesn't seem as simple as sliding a switch.

Sure you can. If there's any type of circuitry inside the machine, then it could easily be controlled by a switch.

 

[Terry D]

OP, can you post a link to the machine your talking about

 

[Terry D]

It's possible. If there are two identical heating elements inside whatever OP is buying wired either in series or in parallel, you could just switch from 120V to 240V very easily.

The point that I'm trying to make is that you would have two 1400 watt elements wired in series at 240 volt or two 1400 watt elements wired in parallel at 120 volts to get the same heat. Wiring them in parallel at 120 volt will also be twice the current compared if they were wire in series at 240 volt. I understand it is possible, but I would think you would have to get inside and physically move taps verses just flipping a switch on the outside.

We wont really know until we see the actual machine

 

[Metal-Marc]

as simple as sliding a switch.

just flipping a switch

The point that I'm trying to make is that you could just toggle a switch.

 

[JazzBlueRT]

But there is heating elements involved here. To get the same amount of heat from 120 to 240 volts doesn't seem as simple as sliding a switch.

Yes, there are 2x 1300w elements, an upper and a lower.

Here is a video of someone replacing the coils.

 

[American Locomotive]

The point that I'm trying to make is that you could just toggle a switch.

For a device with two heating elements, being able to switch between 120/240v could literally be accomplished with a single DPDT toggle switch and slightly clever wiring.

I'm not saying it's always that easy, but it is definitely possible.

 

[JazzBlueRT]

Seller confirmed there were 2 units and that the 220v is sold out.

As I looked deeper into it, the system is basically an air fryer or convection oven with tubing and sealing for vacuum lines.

This is part of a dye sublimation system so I think I am going to just build one from a small countertop convection over I have and currently use for mugs. Seem seems I can drill a hole in the front glass of the convection oven and run a 1/4 silicone vacuum line from an external a/c vacuum pump to the silicon mold. The vacuum holds the mold tightly to substrate for the image transfer.

 

[JazzBlueRT]

For a device with two heating elements, being able to switch between 120/240v could literally be accomplished with a single DPDT toggle switch and slightly clever wiring.

I'm not saying it's always that easy, but it is definitely possible.

I am not very knowledgeable on home electricity. Would that basically be splitting the 220v into 2 110v circuits?

 

[Terry D]

I am not very knowledgeable on home electricity. Would that basically be splitting the 220v into 2 110v circuits?

Its just not as simple switching from 120 to 240. The wiring of the elements would have go from a series to parallel to get the samw heat ot.

 

[Terry D]

Seller confirmed there were 2 units and that the 220v is sold out.

As I looked deeper into it, the system is basically an air fryer or convection oven with tubing and sealing for vacuum lines.

This is part of a dye sublimation system so I think I am going to just build one from a small countertop convection over I have and currently use for mugs. Seem seems I can drill a hole in the front glass of the convection oven and run a 1/4 silicone vacuum line from an external a/c vacuum pump to the silicon mold. The vacuum holds the mold tightly to substrate for the image transfer.

So they are seperate machines for 120 and 240. It isnt a dual voltage machine

 

[American Locomotive]

A 120/240 heating device could be very easily accomplished with a DPDT switch:

EDIT: Confirmed that devices are voltage specific and not switchable.

 

[JazzBlueRT]

So they are seperate machines for 120 and 240. It isnt a dual voltage machine

Yes, there are a lot of advanced control electronics in the system so I guess that is why.

 

[Terry D]

A 120/240 heating device could be very easily accomplished with a SPDT switch:

EDIT: Confirmed that devices are voltage specific and not switchable.

Wouldn't that be a DPDT switch

 

[American Locomotive]

Yes you are correct, I had DPDT in my original post. Just a typo.