That depends on the wire's insulation and the temperature rating of the devices you're connecting it to. This type of question usually means you aren't ready to do this yourself. Study some electrical material and the National Electrical Code and work this answer out for yourself, or call a professional electrician. If I were to give you an answer, you might attempt to do something you shouldn't be doing, and that may cost someone a shock, a home fire, or their life. At least see the applicable Article in the NEC, 310.16.
A 100 amp service requires that you use AWG 4 copper wire or AWG 2 aluminum wire.
A 350 MCM copper conductor with an insulation rating of 90 degree C is rated at 350 amps.
When you talk of voltage, you should be thinking of the insulation factor of the wire. By the same token when you talk of wire size, it is based on the amperage the wire is required to handle.
You need to know the amperage to size the wire. For 220 V at 20 A you would need 12 AWG. At 220 V at 30 A 10 AWG.
2 AWG.
Copper or aluminum AWG. As for gauge and such, it depends on how much amperage you have running through it, and the length of wire.
I would recommend you use AWG # 2 copper or AWG # 1/0 aluminum for that distance and amperage.
AWG # 6 copper or AWG # 4 aluminum
A 100 amp service requires that you use AWG 4 copper wire or AWG 2 aluminum wire.
A 350 MCM copper conductor with an insulation rating of 90 degree C is rated at 350 amps.
When you talk of voltage, you should be thinking of the insulation factor of the wire. By the same token when you talk of wire size, it is based on the amperage the wire is required to handle.
You need to know the amperage to size the wire. For 220 V at 20 A you would need 12 AWG. At 220 V at 30 A 10 AWG.
2 AWG.
Actually, the amperage rating of the circuit is determined by the size of the wiring.The maximum current capacity of common wire sizes are:#14 AWG: 15 Amps#12 AWG: 20 Amps#10 AWG: 30 AmpsCheck the amp rating of the water heater, and make sure that the wiring that supplies it is the corresponding size. NEVERconnect wire to a breaker set for a higher current than the wire is rated for (for example, do not connect #14 wire to a 20 Amp breaker). Allowing more current in a wire is asking for a fire.The HVAC Veteran
The minimum wire size for a 30Amp breaker is typically 10 AWG for copper wire and 8 AWG for aluminum wire, according to the National Electrical Code (NEC). This wire size is necessary to safely carry the amount of current without overheating.
The American Wire Gauge (AWG) system is a measurement of wire diameter, not capacity. The maximum amperage capacity of a 12 AWG wire will depend on factors such as the insulation type, ambient temperature, and installation conditions. For typical household wiring applications, a 12 AWG wire can generally handle around 20-25 amps.
The larger the number of the wire, the smaller the amperage that it can carry using the AWG wire identification system.In the electrical trade the smallest building conductor that can be used is a #14 copper conductor with an insulation rating of 90 degrees C and is rated at 15 amps.The largest building conductors that can be used is a 200 MCM copper conductor with an insulation rating of 90 degrees C and is rated at 750 amps.The above ratings are for allowable ampacities for not more than three copper conductors in raceway. For amperages higher than 750 amps the conductors then become paralleled, tripled and quadrupled.There are other ratings for conductors such as free air rating (question for another day) but these are the ones used by electricians on a daily basis