# What wire size is needed for 50 amp service at 300 ft?

6 AWG is the nominal wire size in copper for 50 amps. 300 feet of 6 AWG has a resistance of .12 ohms. At 50 amps the voltage drop across .12 ohms would be about 6 volts. As a rule of thumb you want to keep voltage drop to no more than 10% of the supply voltage. So it you were using 120 volts you are okay at 300 ft with 6 AWG since the drop is only 5% of the supply. If you were at 240 volts it would be even better since the drop would be 2.5%.

### What size ground wire would you use for a 300 AMP service?

"There are very specific calculations required here. Several variables have to be determined. You don't even say whether you have single phase power or three phase. Do yourself a favor. Be safe AND legal. Pay a few bucks to have an electrical engineer do the calcs for the electrical service entrance conductor sizing." This is not an answer...it's a waffle. <<>> A service of 300 amp is an in between size. What the code states…

### What size wire should you use for 300 amps?

A 350 MCM copper wire with an insulation factor of 90 degrees C is rated at 325 amps. If the question is referring to maintaining a load of 300 amps then you have to up size the wire size because the conductor is only allowed to be loaded to 80%. A 500MCM copper wire with an insulation factor of 90 degrees C is rated at 395 amps x 80% = 316 amps.

### What size direct bury wire is needed for a 200 amp 230 volt service 450' from the source?

This is a voltage drop question. A 300 MCM copper or a 500 MCM aluminium conductor will limit the voltage drop to 3% or less when supplying 200 amps for 450 feet on a 240 volt system. The cheapest of the two conductors would be the aluminium conductor. For direct burial is will have a ACWU 90 designation.

### How do you convert wire size to amps for 240 volt?

For USA, Canada and countries running a 120/240 volt 60 Hz power supply service and also for countries in Europe and other world areas running a 230 volt 50 Hz power supply service. There is no conversion, wire size is based on the load current of the circuit. It is stated in the electrical code books what the maximum capacity of each conductor size will allow. The voltage is independent of the wire size. When…

### What gauge wire is used to carry 120 volts?

You need 14-gauge wire for 15-amp circuits, and 12-gauge wire for 20-amp circuits. <<>> The question is confusing the ability of a wire to carry current, with the insulation factor of the wire. Any size wire can carry 120 volts. The insulation factor determines how much voltage can be applied to a wire. Standard wire voltages come in three voltages, 300, 600 and 1000 volt ratings. These ratings are up to and including, so 300…

### Is there a voltage carrying limit of wire?

Yes it depends on many variables such as what the wire is made of the size of the wire whether the wire is a multi strand wire. What governs the amount of voltage a wire can carry is the insulation that is wrapped around the wire. Like wire with ratings of 300 volts, 600 volts and 1000 volts these are the highest allowable voltages that can be applied. A wire that is rated for 300…

### What gauge of wire is needed for a baseboard heater 1000 watt 240 Volt 4.2 Amp?

I would use #12. THHN #12 is rated for 30 amps. <<>> The minimum size wire that you can use, to save overhead costs, is #14 wire which is rated at 15 amps. Home wiring cable has a rating of 300 volts. Also the above answer is wrong, #12 is only rated at 20 amps. If you have doubts about an answer check out the answerer's bio by clicking on their name.

### How many watts can 110 wire carry?

The first thing we have to do is clarify between the two items. 120 volt wire rating is an insulation rating of the wire. Like wire with ratings of 300 volts, 600 volts and 1000 volts these are the highest allowable voltages that can be applied. A wire that is rated for 300 volts is good for 120 volts, 240 volts and 277 volts. At test research facilities, equipment is tested to destruction. The label…

### What size of wire do you run 300 meters to get 15 amp 110 volt at your gate?

Assuming the allowed volt drop is 5% or 5.5 volts, the wire resistance has to be 5.5/15 ohms or less, 0.367 ohms. The total length of wire is 600 metres so the resistance per metre is 0.00061 ohms. 1 sq-mm copper wire has a resistance of 0.0168 ohms/metre so you need wire with a size of 0.0168/0.00061 sq-mm, or 27.5 sq-mm. The next size up is 35 sq-mm in European cable size, or #2 AWG…

### What size wire do you need for 50 amp sub panel about 150 feet away 120 volts?

The usual allowable voltage drop is 5%, or 6 volts on a 120 v supply. For a 50 amp supply that means the total wire resistance must be (at most) 6/50 ohms, or 0.12 ohms. Because there is 300 ft of wire the resistance per ft must be 0.12/300 ohms per ft, or .0004 ohms/ft or 0.4 ohms per 1000 ft. Wire tables show that #6 AWG wire is needed, with a cross-section area of…

### Is a 300 volt wire good to connect a range?

The 300 volt insulation rating on wire is the maximum amount of voltage that can be applied to that wire. If your range falls within that range then it is safe to use. Some commercial ranges use 480 and 575 volts. For theses types of ranges the 300 volt wire will not do, it will have to be wire with a conductor whose insulation rating is 600 volts or greater.

### What volt rating is 14 gauge 2 wire cable?

You are talking of two different things here. The voltage rating of a wire is based on the insulation factor. Common wire voltages are 300, 600 and 1000 volts. Current rating of a wire is based on the diameter of the wire and measured in AWG. The electrical code states how much current can be legally applied to the wire. Answering your question, the 2 wire cable is probably 300 volt rated and your #14…

### How many amp service do you need to handle 450 volts?

This depends solely on the load you might need a 15 amp service or a 1200 amp service. To find out look at the installation instructions and it will tell you what size the service supply needs to be. Watts = Amps times Volts Amps = Watts divided by Volts Volts = Amps divided by Watts Example 1500 Watt unit will pull 12.5 Amps at 120 Volts or 1500 Watt unit will pull 3.26 Amps…

### What size aluminum wire to supply a 100 amps for 300 ft?

It depends on the voltage but on a 240 v system the volt drop could go to 5% at the maximum load current, which is 12 v, therefore the total resistance allowed is 12/100 ohms or 0.12 ohms. The wire length is 600 ft for 0.12 ohms therefore the wire size should allow a maximum of 0.2 ohms per 1000 ft, which would be #3 wire if copper or #1 if aluminium. Wire sizes are…

### What is insulation voltage of wire?

Where you find wire insulation with ratings of 300 volts, 600 volts and 1000 volts, these are the highest allowable voltages that can be applied. A wire that is rated for 300 volts is good for 120 volts, 240 volts and 277 volts. At test research facilities, insulation on a wire is tested to destruction. The label that is given to wire's insulation, as a result of the tests, is the highest safest voltages that…

### What size breaker should be used for a circuit?

A breaker is sized indirectly by the load current. The breaker is used to protect the wire from being overloaded by amperage. Wire is sized by the load amperage. The procedure is, use the load amperage to find the correct wire size that will carry that amperage safely. Size the breaker so that the amperage on the wire doesn't exceed the rated capacity of the sized wire. The only time a breaker is over sized…

### If you have two 300 watt subwoofers for your vehicle then what size amp do you need?

This is determined by how you wire your subs to your amp. If you get an amp that's bridgeable to mono, then you can wire your subs in series. You will get much more thump if you do it this way. However, make certain that your amp is bridgeable, and stable down to 2 or even 1 Ohms. Check with the dealer you buy from. When wired the way I mentioned, a 300-Watt amp will…