American Wire Gauge (AWG) is a system of numerical wire sizes that start with the lowest numbers (6/0) for the largest sizes. The gauge sizes are each 26% apart based on the cross sectional area. AWG is also known as Brown & Sharpe Gage. SWG = Standard or Sterling Wire Gauge, a British wire measurement system.
What is the gauge of the wire?
American wire gauge (AWG), also known as the Brown & Sharpe wire gauge, is a logarithmic stepped standardized wire gauge system used since 1857 predominantly in North America for the diameters of round, solid, nonferrous, electrically conducting wire. The AWG tables are for a single, solid, round conductor.
Wire Gauge and Ampacity
|Wire Use||Rated Ampacity||Wire Gauge|
|Electric Clothes Dryers, 220-volt Window Air Conditioners, Built-in Ovens, Electric Water Heaters||30 Amps||10 Gauge|
|Cook Tops||45 Amps||8 Gauge|
|Electric Furnaces, Large Electric Heaters||60 Amps||6 Gauge|
|Electric Furnaces, Large Electric Water Heaters, Sub Panels||80 Amps||4 Gauge|
|Types of Cord||Gauge Size Range||Ampacity of Current-Carrying Conductors (amperes)|
|0 - 50 ft. (0 - 15.2 m)|
|SJT - Service Junior Thermoplastic SJTOW - Service Junior Thermoplastic Oil Resistant Weather-resistant||18 AWG||10 Amps 7 Amps|
|16 AWG||13 Amps 10 Amps|
|14 AWG||18 Amps 15 Amps|
What Gauge Wire Do I Need For My Amp?
|Wire Gauge Size||Total Amplifier RMS Wattage|
|0/1 AWG||1000+ Watts|
|2 AWG||1000-1500 Watts|
|4 AWG||400-1000 Watts|
|6 AWG||600-800 Watts|
Wire Gauge Conversion Chart
|Wire Gauge||Precious Metal (AWG)||Base Metal (SWG)|
|16||0.051" 1.291 mm||0.062" 1.6 mm|
|14||0.064" 1.63 mm||0.08" 2.0 mm|
|12||0.081" 2.025 mm||0.104" 2.64 mm|
|SERVICE ENTRANCE CONDUCTORS SIZE AND RATING|
|Service or Feeder Rating||Copper Conductors||Aluminum or Copper-Clad Aluminum|
|125 Amps||#2 AWG||#1/0 AWG|
|150 Amps||#1 AWG||#2/0 AWG|
|200 Amps||#2/0 AWG||#4/0 AWG|
1. Unit of thickness of a metal sheet or wire. (1) For sheet metal, a retrogressive scale (higher numbers mean lower thickness) that starts with 10 gauge representing a thickness of 3.416 millimeters or 0.1345 inches. As the gauge number increases, the thickness drops by 10 percent.
The confusion continues with all the ways AWG can be abbreviated. For example, you or I might say or jot down that a conductor is “12 gauge”. But, that can also be expressed as 12 AWG, #12, No. 12, No. 12 AWG, or 12 ga. They all mean the same thing and are used interchangeably.
Sheet metal is metal formed by an industrial process into thin, flat pieces. In the US, the thickness of sheet metal is commonly specified by a traditional, non-linear measure known as its gauge. The larger the gauge number, the thinner the metal. Commonly used steel sheet metal ranges from 30 gauge to about 7 gauge.
You need a 3-3-3-5 copper SER cable to carry 100 amps (that's three #3 gauge for the two hot wires and the neutral and a #5 gauge for the ground). If you want to use aluminum, you need at least #2 gauge or perhaps #1.
Ampacity is a portmanteau for ampere capacity defined by National Electrical Safety Codes, in some North American countries. Ampacity is defined as the maximum amount of electric current a conductor or device can carry before sustaining immediate or progressive deterioration.
The larger the cross sectional area, the lower the resistance since the electrons have a larger area to flow through. This will continue to apply no matter how thick the wire is. The electron flow will adjust itself to whatever the wire thickness is. Electricity is nothing but the flow of electrons through a material.
Shotguns are classified by gauge, which is a measure related to the diameter of the smooth shotgun bore and the size of the shotshell designed for that bore. Gauge is determined by the number of lead balls of size equal to the approximate diameter of the bore that it takes to weigh one pound.
Wire Size and Amp Ratings
|60°C (140°F)||75°C (167°F)|
It is also known as: Imperial Wire Gauge or British Standard Gauge. Use of SWG sizes has fallen greatly in popularity, but is still used as a measure of thickness in guitar strings and some electrical wire. Cross sectional area in square millimetres is now a more popular size measurement.
Rather than measure small wire sizes in inches, the unit of “mil” (1/1000 of an inch) is often employed. The cross-sectional area of a wire can be expressed in terms of square units (square inches or square mils), circular mils, or “gauge” scale.
It refers to how big of a piercing hole is needed to accommodate the jewelry. Gauge is abbreviated g. Gauge sizes are usually a number followed by g or the word gauge. Gauge sizes work in reverse, meaning that higher numbers (like 16 gauge) are thinner than smaller numbers (like a 6 gauge).
Thick wire (12 or 14 gauge) is recommended for long wire runs, high power applications, and low-impedance speakers (4 or 6 ohms). For relatively short runs (less than 50 feet) to 8 ohm speakers, 16 gauge wire will usually do just fine.
American wire gauge (AWG), also known as the Brown & Sharpe wire gauge, is a logarithmic stepped standardized wire gauge system used since 1857 predominantly in North America for the diameters of round, solid, nonferrous, electrically conducting wire.
12-gauge wire is the next size larger and is allowed to carry up to 20 amps. As a result, the amp rating of a circuit breaker has the following relation to the wire size that has been chosen. A 20-amp breaker is never* allowed to run any circuit whose wires (anywhere on the circuit) are 14-gauge.
Wire Gauge vs. Diameter
|AWG gauge||Conductor Diameter Inches||Ohms per 1000 ft.|