Aic-controls.com has a wire size chart and a maximum Amp rating chart.

When a circuit is extended or rewired, it is important that the new wiring is made with wire conductors that are sized for the circuit's amperage rating.The larger the wires, the less heat that can melt them and cause fires.The proper circuit size is determined by a number of factors, including the load on the circuit, the amount of outlets or light fixture, and the length of thecircuit.It's important that the wire gauge used in the circuit is appropriate for the amperage of the breaker.

There are many types and sizes of wire to choose from if you've been shopping for electrical wire.Knowing the right wire size, or gauge, is a must when choosing wire for different uses.

The wire is measured by the AWG system.The larger the wire gauge number, the larger it is.14-, 12-, 10-, 8-, 6-, and 2-gauge wire are common sizes.The size of the wire affects how much current can be passed through it.

Each wire gauge has a maximum safe carrying capacity.The capacities are for standard non-metallic cable.

The ratings are for standard copper NM sheathed cable.Some homes have aluminum wiring that has its own ampacity-carrying capacity.When aluminum was found to have a greater expansion profile under load, it often loosened wire connections and caused electrical fires.It is not to say that you are at risk just because you have aluminum wiring.An evaluation and replacement of copper wiring is a good idea.