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MAINS ELECTRICITY IS VERY DANGEROUSELECTRICITY CAN KILL YOU IF YOU DON'T REALLY KNOW WHAT YOU ARE DOING=IF YOU ARE NOT SURE YOU CAN DO THIS JOB SAFELY YOU MUST CALL IN A LICENSED ELECTRICIAN TO DO IT FOR YOU.=
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What is the US equivalent of European 4x2.5 sq mm HO7RN-F and could US 10 2 be substituted for the European cable to hardwire a 240V 27A appliance?
If you want an American plug to power a 30A 220V device look at a dryer outlet. It will have an extra neutral conductor, but it is standard. Otherwise, you can go with a 220V 30A TwistLok plug. All the home centers [I've been to] carry these plugs. 10ga wire is heavy enough for 30A runs under 75ft, though for a 27A appliance you should consider a 40A breaker with 8ga wire.
What size wire for a welding extension cord 220v 50 amps?
Wire size depends on amps. Use #10 for 30a. #8 for 40 or 50a. #6 for 60a.
Can 110V circuit with 2 wire size of 10 and a ground be converted to 220V after changing the outlet and breaker?
It depends on the amount of current (Amps) your breaker is rated for. If you boost your voltage the current will go down proportionally. 10 guage wire has an allowable ampacity of 30A. so if you are not drawing more than 27A you should be ok.
Can you run 8 gauge thhn wire for 30a circuit?
yes
What breaker do you use for 10-2 wire?
Assuming a 120V circuit then a 30A Single Pole. For a 240V circuit an 30A two pole. Of course anything smaller that a 30A is acceptable. 30A is the maximum allowed.
What is the US equivalent of European 4x2.5 sq mm HO7RN-F and could US 10 2 be substituted for the European cable to hardwire a 240V 27A appliance?
If you want an American plug to power a 30A 220V device look at a dryer outlet. It will have an extra neutral conductor, but it is standard. Otherwise, you can go with a 220V 30A TwistLok plug. All the home centers [I've been to] carry these plugs. 10ga wire is heavy enough for 30A runs under 75ft, though for a 27A appliance you should consider a 40A breaker with 8ga wire.
Can you make an extension cord that would have a NEMA l5-30p 30a 125v plug on one end and a NEMA l14-30r 30a 125v receptacle on the other end to connect a generator parallel kit to a transfer switch?
Yes. Use 10awg wire, mindfull of length voltage drop.
What size wire for a welding extension cord 220v 50 amps?
Wire size depends on amps. Use #10 for 30a. #8 for 40 or 50a. #6 for 60a.
Can 110V circuit with 2 wire size of 10 and a ground be converted to 220V after changing the outlet and breaker?
It depends on the amount of current (Amps) your breaker is rated for. If you boost your voltage the current will go down proportionally. 10 guage wire has an allowable ampacity of 30A. so if you are not drawing more than 27A you should be ok.
Can you run 8 gauge thhn wire for 30a circuit?
yes
What breaker do you use for 10-2 wire?
Assuming a 120V circuit then a 30A Single Pole. For a 240V circuit an 30A two pole. Of course anything smaller that a 30A is acceptable. 30A is the maximum allowed.
What happens when a 20amp device connects to a 30amp receptacle and the power supply fails - will it trip the breaker?
Assuming you are referring to the power supply failing in your 20A device, it could cause the 30A breaker protecting the receptacle to trip. It depends on the mode of failure. It is easy to imagine a condition where a short in the power supply could cause a current in excess of 30A to flow to the device and trip the breaker.
In wiring for 220v can one use 2 15a breakers instead of a ganged 30a breaker?
Yes, you just have to be sure you are grabbing power from each of the two legs.
Do you need to use some type of mini breaker panel with a single 15A circuit breaker to connect a 15A receptacle into a 30A line?
To be short...Yes
Can you run a 30A dryer on a 50A receptacle?
You can always run under a receptacles rating. This just means how much current can be drawn thru the breaker before it will trip.
How do you upgrade a 30A outlet to a 50A outlet can I just change the outlet and upgrade the circuit breakers?
No. The receptacle, wiring, and breaker ratings should all be matched properly. Replacing the 50A receptacle with a 30A receptacle isn't a problem, since the wire should be rated at least 50A. But a 30A receptacle should be protected with a 30A double pole breaker. The breaker only costs about $8.00, so why wouldn't you change it given you don't have to change the wire which would actually be expensive or time consuming? The fact that you mention a 50A receptacle protected by a 20A existing breaker isn't normal either. I would check to make sure the wiring is actually rated for 50A and that someone didn't just throw a 50A receptacle onto a 20A circuit. (This means your wiring should be at least #8AWG THHN Copper wire.) If you protected a 30A receptacle with a 20A breaker, the load might trip the breaker often, considering the appliance requiring a 30A receptacle probably requires about 30A. If you do not understand the work well enough to accomplish it yourself properly and safely, don't try it. Consult a professional electrician, as they are proficient enough to do it properly and safely. When working on electrical circuits and equipment, make sure to de-energize the circuit you will be working on. Then test the circuit with a definitive means to make sure it is off (multimeter with metal tipped leads, voltage tester with metal tipped leads, etc., not a non-contact tester, which is non-definitive.)
Can you safely change a 30 amp breaker to 20 amps?
No, this is not a recommended procedure. The breakers main job is to protect the wire that is connected to it. A 20A breaker will have a #12 wire (rated 20A) connected to it. A 30A breaker will have a #10 wire (rated 30A) connected to it. As you can see if you use a 30A breaker on a #12 wire you could overload the wire by 10 amps. I have seen an incident where the insulation has melted off of an overloaded wire, the wire short out and a fire start before the bigger size breaker tripped. DON'T DO IT.
