There is a device that you can pick up from a DIY store. Ask the clerk to show you their duplex breakers. The one that you should be looking for is a 15-30-30-15. This will allow you to remove two 15 amp existing breakers and install this new one. The two existing 15 amp circuit loads will be connected to the new 15 amp positions on the new breaker. Your required 30 amp load will be connected to the center position on the new breaker.
It depends on what you mean by the breaker panel being full. It depends on the equipment involved and would require more detailed information about the existing electrical panel.
If you don't know the answer, contact a licensed electrician.
Take two breakers out of the box and add a high power 240 volt circuit. Run that to a subpanel, and add the breakers (including the two you took out) to the subpanel.
Remember that the safety ground and the neutral must be kept completely separate in the subpanel.
As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.
Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
Absolutely not. #2awg conductors are only good for about 100 amps depending on Cu or al. see nec table 310-16.
if i have a breaker that has a 120/240v and my dryer has a 240v plug can i change the receptacle to a 240v
For a 7000watts or 7kw a 240V then it is 30 Amp
Look to see if the 30 amp panel is fed with a two wire or a three wire. If it is a two wire then you are out of luck. If the panel is fed with a three wire then the panel should have the neutral terminated in the panel. It is this neutral that you need for 120 volt connections. You didn't state how many panel slots there are in the panel. If you are able install a 15 amp breaker into the panel and connect the wires going to the load. The black wire will go to the breaker and the white wire will go to the neutral bar in the panel.
A 240 volt breaker can be removed and replaced with 2 - 120 volt breakers. The existing 240 volt breaker should not be used to supply 2 separate circuits.
In America, a 2-pole breaker is controlling 240V. 120V per leg.
Two pole (for 240V), 30A typical.
No, amperage is not additive, but a constant. Think of power as water, its always the same temperature, hot (amps). The pressure is variable (volts). The true answer is undoubtedly more complex, but you get the point. If you need to draw 200 amps you would actually need a 400 amp service because code states you cannot have more than an 80% load on a breaker That's an interesting question and I had to run the theory through my brain a few times to confirm my answer. The answer is if you have a 100A 240V service, you could draw what appears to be 200A from that panel at 120V. If you install 100A 120V single pole breakers on each side of the panel (in reality this would be many breakers but let's keep it simple) then both breakers will operate just fine, giving the appearance of 200A. In reality, however, one breaker actually feeds through to the other breaker. The neutral only carries the unbalanced load so in this hypothetical situation the neutral at the panel carries 0A. So the answer to the question is...if you install ONLY 120v single pole breakers, you can run up to 200A on those circuits (or 80% of that as we have discussed.) But you are only running 100A on each leg of the service conductors and breaker.
I don't know if you are trying to ask if you can run a 240V panel off a GFCI or run a 120 V sub panel off of a GFCI. Can you clarify please,,,Thanks
you should have three wires into the panel. two of them go to the double breakers or pull switch and the last is the ground lead. You can pick up 110 vac from one side of either breaker and that ground connection. DO NOT connect to the both breaker wires as that will be 220 vac
The 30 A breaker you seem to be describing is a 240V breaker. There should be two black wires or perhaps a black and red wire connected to the two screws on the breaker. So the breaker would trip if more than 30A was demanded by the load with 240V across the load. What you have connected to the breaker should be sized such that the total current is no more than 80% of the 30 A.
A 100 amp breaker is too large for the average range. If you meant 100 amp service panel then the following installation will work. The most common size breaker used in North America for an electric range is a two pole 40 amp breaker. The feeder to the range receptacle will be a #8 conductor.
240 volts require 2 poles on a panel - 120V each pole - so the answer on "how" is that you can't.
I suspect you mean GFIC breaker. The dryer will not cause the breaker to fail.
That could only happen if the neutral wire (white) becomes disconnected at either the panel, the meter base or the transformer.
The short answer to your question, is "yes" if you are talking about 120 volts. The panel is rated 200A @ 240v. In reality, service panels should be rated in watts (or kilowatts) We are charged by watts and we use electricity in different combinations of volts and amps, but watts remains a constant. (hence the reason we are charged by that value) So, as you noted, there are two legs, that each pass through a pair of interconnected 200 amp breakers. With 240v appliances, power is tapped from each leg, so at no time can 200 amps be exceeded. But with 120v appliances, power is tapped from one leg and terminated to the neutral leg. It is possible to draw a total of 400 amps from both legs, to the neutral. (actually, it's more complicated than that, as the neutral would never see more than 200 amps, and power is actually being routed in series between loads of each leg, so in reality it's still only a max 200A at 240v)So, for further clarification, let's get back to the watts thing. Watts can be calculated mathematically. Watts = volts X amps. So 240v times 200A equals 48,000 watts. That is your service panel's rated wattage. Now, the math can be reversed. 48,000 watts divided by 120v equals 400A.A simple way to present the question would be, "Could you have twenty 20 amp single pole circuit breakers at full load in a 200A service panel?" The answer would be, "yes."
10/3 with ground NM.
At 240V it can support 7200W
you do NOT put two 110v breakers in. you put 1 two pole breaker in. the panel is designed to give you 220v off one side OR the other side if you use a 2 pole breaker on one side or the other side. If you look at both 120V lines on an oscilloscope you will notice that they are both 120V to the neutral, but they are 180 degrees out of phase. This means that when one hot is at +120V the other is at -120V. So between the two you have 240V. If you put your meter across both hots you should see 240V. If you do not see 240V across both hots you (or an unlicenced electrician) has wired the outlet without using a proper 220V breaker. You do not see 240V because the hots are in phase, to the voltage differential is 0V, not 240V. 220V breakers cannot do this, unless forcebly installed in the wrong type panel. More than likely someone tried to wire it with 110V breakers.
Yes it will operate it fine.
Assuming a power factor of 0.85, at 240V 3 phase, 15KW load would draw a full load of 42.5 Amps. 50 Amp rating breaker will be suitable.
Technically it's a 20 amp load (20A x 240V = 4800W). However, you should not run a breaker at full load. The breaker is to protect the wiring from overheating and from short circuits. You should use 10 gauge wire and a 30 amp double pole breaker.
It would have to be a 30 amp breaker to use the full power of the welder. I'd say go with the 30A. The general rule is that your planned load should only be 80% of the circuit capacity. That means a 30A circuit should have a maximum load of of (30*0.8) = 24A. With the 30 amp breaker you must have at least #10 wires feeding the circuit.