What are the ampere rating of the following copper conducter sizes?

Question

AWG 14

AWG 12

AWG 10

Answer 1

Since those are sizes often used for building wiring, I'd suggest looking them up in the electrical code adopted in your area (likely the NEC most places in the US)

Since heat is the limiting factor, and the heat resistance of different types of insulation varies, there are more variables to consider than just the gauge.

Still,  for many common uses, particularly in residential wiring,

14ga, 15A

12ga, 20A

10ga, 30A

[EDIT] I should have said heat and voltage drop, so there is one more variable to consider, though for short runs, such as inside a house,  voltage drop is often ignored. However, if you are, for example, wiring a well pump 600ft from the house you will need to consider voltage drop.

Answer 2

A wire size (or gauge) refer to the cross-section of copper in the winding.

The more current is passed through a conductor, the higher the temperature (and therefore the resistance) becomes.

Almost all conductors have some type of insulation used to isolate the "live" copper from the "grounded" system in which it is installed. The better the insulation, the higher the operating temperature can become, and hence the more current draw allowed for a given wire cross-section.

Lack of forced-cooling, inadequate spacing between conductors, multiple conductors in a raceway, and ambient temperature will also introduce factors that will reduce the allowable ampacity of a given cable.

For cable rated for 140 F = 60 C: (at ambient 86 F = 25 C)

AWG 14  = 25 A, AWG 12 = 30 A, AWG 10 = 40 A

For cable rated for 167 F = 75 C:

AWG 14  = 30 A, AWG 12 = 35 A, AWG 10 = 50 A

For cable rated for 194 F = 90 C:

AWG 14  = 35 A, AWG 12 = 40 A, AWG 10 = 55 A

Answer 3

look them up here

http://www.powerstream.com/Wire_Size.htm

.

Answer 4

AWG 14   15amps

AWG 12    20amps

AWG 10    30 amps

If your referring to basic 110 circuit wiring.

However if this is a bigger project which I suspect it is a 230 3-phase project you'll need a "wire size calculator" this:

http://www.csgnetwork.com/wiresizecalc.h...

is my favorite.

Length of circuit and other consideration is necessary.

If this is a commercial project you'll have to run in emt conduit and all accessible motor need magnetic starters so they will drop out in case of power outage.