Questions tagged [240v]

For questions dealing with 240 volt electrical circuits, devices, and equipment. This tag covers the similar voltages as well (i.e. 220, 230, etc), since they generally refer to the same thing. Use with the [electrical] tag.

240 V is a common voltage used in residential systems. In some parts of the world (most notably Europe), 240 V is provided for all receptacles. In the United States (and those countries who use the 120 V US standard) it is achieved by using both ungrounded (hot) legs of a 120/240 V single split phase system. This voltage is sometimes referred to as 220 V and 230 V as well, due to the changing of voltage standards over time (see this question for a fuller explanation).

Many larger electrical appliances use 240 V, including

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What's the difference between three phase 240 V and standard household 240 V?

I don't understand the difference between household 240 and 3 phase 240. Isn't household 240 just two 120 phases, making 240V two-phase? If so, wouldn't three phase just be 360v? How, then, is there 240 and 480v three phase? Does each conductor…
kewltek
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Replaced my first power cord. Will I set the house on fire?

I’ve replaced the power cord of an appliance for the very first time. How does it look? I have switched the appliance on for 3 mins and there were no fires. I just want to make sure it’s safe. It’s a NEMA 6-20P plug.
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240v 3 prong - no voltage with neutral

My 3 prong 240v outlet shows 240v when measuring across red and black wires. However, when testing either hot to the third wire I get 0 volts. My understanding is it should be 120v. What does this signify? At the breaker box each wire going into the…
jdrich79
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Can I use a transformer with center tap to convert 240V to 120v?

I want to buy a 500W RMS surround system from the US and it is 120VAC. I'm planning to use a transformer here but I'm not sure what is the size/specs of the transformer to use or will it going to work this way.. I need your expert advice on this…
mboy
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How to hook up sauna heater wired for 3 wire 230v to US 240v?

Purchased a sauna at Home Depot. The heater that came with it is Advertised as 220v 20 amp. My plan was to plug it into a 240v outlet I have in the garage (though after looking at my panel it is currently going to a 30 amp). When it arrived the…
David
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New stovetop appears to be single pole 240

I have a new stovetop from Amazon that appears to be single pole 240 system. It has two hot but they are soldered together. Could this be right? Did I buy the wrong thing? It was an Amazon 'special'. There are only three sets of wires and the wiring…
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Using ent conduit “smurf tube” for 4 4awg wires

I’m currently running power to my garage. I have to special order 1.5” flexible metal conduit. So I was going to just use some one inch stuff. I didn’t want to buy 25ft. So I found smurf tube. Can I use that for my flexible conduit from the outside…
Cory
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I have a car EV charger with a NEMA 6-20 plug and a different 240v receptacle -- adapter?

I bought a 240V car EV charger with what I understand is a NEMA 6-20 plug: But the socket is some other 240V that I can't find the specifications for: Is there an adapter I can get to use this plug for this socket or do I need to get the socket…
Mark McWiggins
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change 110v outlet to 240v/30 amp?

I need to install a 240v/30 amp outlet for a microwave (a Turbochef, kind of like a microwave on steroids.) I have a single 110v outlet on its own circuit. It's using 10 awg copper. Can I replace that with a 240v outlet and change the breaker to…
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240 outlet giving abnormal me abnormal readings

I just moved to a new house and was troubleshooting a dryer when I noticed my outlet is giving me incorrect voltage. I know I should have two hots (A and B) on either side, a ground at the top (C) and a neutral on the bottom (D). When I hook up the…
Lance
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2 sets of 12/2 romex for one 20 amp appliance?

I have a lot of 12/2. I have a 20 amp appliance that I am replacing with a new 20 amp appliance. However the old appliance is 110 and the new appliance is 220. Can I run a second 12/2 romex to convert to 220? My understanding is that this is not…
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240v 50A on the same line as a 50A RV outlet

I'm looking to install a 50A RV hookup which I understands translates to two 120v parallel circuits with a shared common. I'd also like to have 50A 240V outlet in the same location allowing me to back-feed power to the service box using a 50A PTO…
Josh
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Can I replace a outlet dedicated 16A/240V with a 20A/125V outlet

can i replace 16A/240V outlet to 125V/20A outlet and it will work for 240V? israel outlet i want plug my pc and monitor + ups + isolator transformer on this outlet but its 120V/20A this is my electrical panel i dont know how i check wire size but i…
daniel
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Can I install 2 240v baseboard heaters in separate rooms?

Can I install "2" 240v baseboard heaters in separate rooms? supplied by "1" Quad 2-pole 240 volt circuit breaker with a 10/2 or 10/3 wire? each baseboard heater pulls about 500 to 600 watts each. Both are new installations with new wiring.
Omar C
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Voltage on 10-30R metal faceplate

I just moved into a new house where there are two 240 volt 10-30R outlets in the garage, each with a 30-amp breaker and 10 gauge wire. Voltage across the hot terminals is 247 and, of course, approximately 124 volts from each hot terminal to neutral.…
MikeB
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