![]() So a 30-amp circuit can easily handle 24 amps. When the load is over 80%, it will get stored in the remaining 20%, preventing short circuits and breaker tripping. ![]() This will keep the breaker safe and avoid overloading, breaking tripping, and short circuits. Usually, in a 30-amp breaker, you must use only 80% of the load and leave the remaining 20%. The 80% rule helps determine the amperage a 30-amp breaker can handle. So, you can go for a 6 or 8 AWG, but not 12 or 14 AWG. The wire size can be lower than 10 AWG, but it should not exceed 10 AWG. How many amps can a 30-amp breaker handle?Īs I said, 10 AWG wire is the minimum requirement for a 30 amp breaker for operating each phase in the process.Įxperts recommend using a thick wire with lower AWG that can carry enough current. If you use aluminum wires, use a 6 or 8-AWG wire for safety. If you have such devices, you need higher amp service.Īs for the 30 amps, you will have circuit breakers to run appliances like refrigerators or central air conditioning.įor such breakers, you need a 10 AWG wire. It is still unsafe even if you have one electrical appliance that draws only 10-15 amps. These devices alone can draw current up to 20 to 30 amps. It is possible to run an entire house for 30 amps services, provided you do not have any modern electrical devices. With this, you can take advantage of the wire’s capacity and maintain human safety at its best. The 310-16 code suggests adding an extra 20% of the wire’s ampacity for 30 amps every time the distance increases to 100 feet. So, with 37.5A ampacity, an 8 AWG wire after 10 AWG wire will perfectly fit 30 amps. But you also need to follow the 80% rule here.įollowing the 80% rule, the perfect wire size for 30 amps is 8 AWG wire with 50A ampacity.īased on the material, 30 amps should represent 80% of the ampacity of the wire.ģ0 amp wire = 30A x 100% / 80% = 37.5A ampacity. It is expected to believe it can handle 30 amps. The 220-2 code will check the wire size usually required for a 30 amp circuit by looking at the AWG wire size chart in the NEC.Ī 10 AWG wire is the most recommended wire size for 30 amps.īut most house owners ask how far we can run the 10 AWG wire for 30 amps. Add 20% to the wire’s ampacity for every 100 feet away from the sub panel.
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