There is a formula based on wire type, length, and current. The easiest way nowadays is to use an online calculator. Remember when using that calculator that both wires in the circuit count (hot & neutral), so don't divide the length by 2. Just enter the length of your run.
Wire sizes are calculated on the amperage that the load draws. For a certain load amps you will need a specific wire size and a breaker to match the amperage flowing through that wire. A few common wire sizes and amperages you would find in your house #14 - 15 amps, #12 - 20 amps, #10 - 30 amps and #8 - 40 amps. These are published in the electrical code book.
Several different factors must always be considered when deciding the correct wire size to use:
To get the right answers refer to the Wiring Codes or Regulations for your locality. (Town/State.)
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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.
To select an appropriate wire guage you must need electric appliance wattage and divide it with volt (i.e. 1000 watt electric iron just 1000/220=4.54 amp) Do remember to divide your amp with .80 because you will never to want to put the load according to the wire capacity, by dividing .80 mean wire does has appro. 20% more capacity than the appliance. so now you have 1000/220/.80=5.68 amp. now you can easily find out the proper guage by visiting the Chart as below or any one else: -
http://www.crutchfield.com/S-C8qXuqgSdrg/learn/learningcenter/car/cable_gauge_chart.html
You are also advised to take professional's guidence as per the above given information is collected from the internet.
By the voltage supplied and current needed by the speakers to satisfy the speaker watts specfications.
12 gauge
30 gauge wire is much "thinner" than 10 gauge wire. Hence, if you are using 10 gauge for an application requiring only 30 gauge, it will more than handle any current flow. However, if the application requires 10 gauge wire you cannot use 30 gauge wire.
The lower the voltage the larger gauge wire you will need to get the same power.
A. It's 240 volts & B. Wire size is a function of amperage. 12-gauge wire is used with 20 amperes or less. So, 12-gauge wire can be used with 120V/20A or 240V/20A. Keep in mind though that 240V in the U.S. has 2 live 120V lines so if you encounter a white wire, it's probably an unmarked live & should be repainted as black or better yet, red (to indicate the 2nd live wire).
Yes. It is abbreviated as AWG. For example, in residential wiring the size wire to use on a 15 Amp circuit would be 14 gauge or 14 AWG.
Wire gauge is used to determine the size wire needed to carry the correct amount of current for the job. It must be sized appropriately for the current in the circuit you are building.
34 gauge copper wire will work but to use the 35 gauge copper wire is the best choice
use a stronger wire for longer antennas...the gauge may not be as important as the strength if you string it outside.
For the best performance I wold use at least a 14 gauge wire.
12 gauge wire is used for household plugins, and 14 gauge wire is used for lights. So, 12 gauge is the size to use. But since a freezer has an electric motor, it is best to not plug anything else with a motor into the same circuit.
12 gauge
wire gauge is used to determine the size of the wire to be installed based on the amperage draw of whatever is being hooked up on the receiving end. ie 14 gauge is for a 15 amp circuit, 12 gauge is for a 20 amp circuit, 10 gauge 30 amp etc. to get specific amp draw ratings on a particular gauge of wire look at a current National Electric code book or ugly book.
Wire crochet has become a very popular handicraft mostly used for making jewelry. The best kind of wire to use to learn the technique is a 22 or 24 gauge jewelry wire.
The gauge of a write it's determined by the application. The three main factors are length, voltage and current. The American Wire Gauge (AWG) is a standardized system that has been in use since the late 1800's. There are tables that can be used to determine the gauge if you know the application. The gauges that are used for wire are not the same for the steel industry as they use several other standards.
The wire gauge in thin headphone cables is quite small. I have read of people rewiring their headphones using 12 Gauge wire. There are commercial cables that use 11 gauge. The thicker the wire the less the resistance up to a point. Many headphones use 22 or 24 gauge and it seems to work OK.
The cars computer is calibrated for a certain gauge wire. There is a small amount of leeway allowed. However use as close to original gauge wire as possible.
It is better to use 16 gauge or 14 gauge speaker wire for your home theater applications.