The length of run and voltage are irrelevant, rating of the cable and where/how it is installed are what matter.
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A #3 AWG copper conductor will limit the voltage drop to 3% or less when supplying 30 amps for 200 feet on a 110 volt system.
Although # 10 gauge wire is rated to carry 30 amps, you should go one size larger, # 8 gauge because over 100 ft you will experience voltage drop. The larger conductor will compensate for that.
for 30A minimum cross section is 10mm2 (7 AWG)
WELL ACTUALLY:If the distance isn't too great, you can use 10 AWG for 30 amps. Check the NEC or refer to the link below for a wire size calculator. Some Rationale:First of all the questions is poorly worded. The 220 volts is present in the electric panel and needs to be connected to a load by the proper gauge wire rated for the voltage, temperature and various other factors required by the specific application. For a typical residential application in the USA, such as an electric dryer or hot water heater 10 AWG wire is used. As to the length of the run, the longer the run the greater the resistance contributed by the size of the wire.For example, 10 AWG copper wire has a resistance of about 1/10 of an ohm per 100 feet. The maximum voltage drop should be less than 10%. So at 220 volts you don't want a drop caused by the wire to be more than 22 volts. Using Ohm's Law and assuming a maximum current or 30 amps and 100 ft. of 10 AWG wire with a resistance of .1 ohms we have:
30 amps x .1 ohms = voltage drop of 3 volts which is well under 22 volts. Even doubling the length to 200 ft you only get a 6 volt drop. So under most realistic conditions for a residential application 10 AWG is the answer.
10-2 +ground.
That is a really long run. 8 AWG.
10 AWG.
12 AWG.
#10 copper.
8
In the US and Canada, 10 Guage wire will suffice
It depends on the supply voltage because at that distance the size of the wire is calculated on the volt-drop which is 5% of the supply voltage, or 3% in some countries. The allowable resistance equals the volt-drop divided by the current, then you can use wire tables to find the wire size, remembering that a supply needs 2 wires which are in series so that their resistances add. <<>> To answer this question a voltage value has to be stated. This is due to the higher the voltage the lower the current on a specific load. The lower the current, the smaller the wire size can be.
Yes, no problem at all going to a larger ampacity of wire. Larger size wire yes, smaller size wire no.
8 gauge will be sufficient with less than a half volt drop
4 copper
In the US and Canada, 10 Guage wire will suffice
Depends on length. The more length, the more resistance.
A 1/0 aluminum conductor will limit the voltage drop to 3% or less when supplying 30 amps for 500 feet on a 240 volt system.
It depends on the supply voltage because at that distance the size of the wire is calculated on the volt-drop which is 5% of the supply voltage, or 3% in some countries. The allowable resistance equals the volt-drop divided by the current, then you can use wire tables to find the wire size, remembering that a supply needs 2 wires which are in series so that their resistances add. <<>> To answer this question a voltage value has to be stated. This is due to the higher the voltage the lower the current on a specific load. The lower the current, the smaller the wire size can be.
Use 8 gauge wire.
Yes, no problem at all going to a larger ampacity of wire. Larger size wire yes, smaller size wire no.
8 gauge will be sufficient with less than a half volt drop
A #10 copper conductor will limit the voltage drop to 3% or less when supplying 21 amps for 150 feet on a 240 volt system.
# 3 gauge
4 copper
6 AWG
As with any electrical installation, the wire size used depends on the expected maximum current the wire will carry. That cannot be determined by voltage alone.