A #4 copper conductor with an insulation factor of 75 or 90 degree C is rated at 110 and 115 amps respectively.
As for the distance this is a voltage drop question and a voltage needs to be stated.
If the run is less than 100' use 4 AWG copper.
10 AWG.
A 30 amp breaker run 75 feet would require you use AWG #10 wire. But, an oven normally pulls more that 30 amps and I would not use #10 wire on a 30 amp breaker for an oven. Normally any newer oven is wired with AWG #6 gauge wire on a 50 amp circuit breaker so the breaker will not trip during heavy use of the oven. Some older ovens could use a #8 wire on a 40 amp breaker.
i just left lowes an they told me to run 100 amp to my building i would need wire size 2-2-2-4 alumninum and run it in conduit the lowes around here does not sell copper wire that size
It depends on the application, but for Single-Phase dwelling service and feeders 3 AWG copper is good for 110 amps. That really equates to 100 amps since you can't get a 110 amp circuit breaker.
If the run is less than 100' use 4 AWG copper.
10 AWG.
Use AWG 12/2 with ground.
Normally older ovens required a AWG #8 wire on a 40 amp breaker. On a modern double oven I would recommend you install AWG #6 on a 50 amp breaker. That way you are safe and will not have to worry about the breaker tripping. It will cost a little more but is worth it in the long run.
I would recommend you use AWG # 2 copper or AWG # 1/0 aluminum for that distance and amperage.
Normally AWG #10 wire on a 30 amp breaker but it really depends on the size of the pump. The pump manufacture will specify the size wire and size breaker needed.
A 30 amp breaker run 75 feet would require you use AWG #10 wire. But, an oven normally pulls more that 30 amps and I would not use #10 wire on a 30 amp breaker for an oven. Normally any newer oven is wired with AWG #6 gauge wire on a 50 amp circuit breaker so the breaker will not trip during heavy use of the oven. Some older ovens could use a #8 wire on a 40 amp breaker.
i just left lowes an they told me to run 100 amp to my building i would need wire size 2-2-2-4 alumninum and run it in conduit the lowes around here does not sell copper wire that size
I would use AWG # 4 copper.
Installing a breaker box to the mains is a very dangerous proposition and should only be done by someone who knows what they are doing. It involved removing the meter so that the power is disconnected on the house side, Then the proper size and type of cable is run from the meter to the switch and then to the panel. 3 AWG copper or 2 AWG aluminum is required. The installation would also depend if this were a new additional panel or replacement panel.
It depends on the application, but for Single-Phase dwelling service and feeders 3 AWG copper is good for 110 amps. That really equates to 100 amps since you can't get a 110 amp circuit breaker.
If it is a 110 volt light it can safely run on a 20 amp circuit with AWG # 12 wire.