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Some local electrical codes don't allow mini breakers, so check with local codes before you install them. As a general rule the total load of all breakers should not exceed the supply load of the main. As a general rule the total load of all breakers should not exceed the supply load of the main.
This is not a true statement . You will find that if you add up all the breakers, in most cases the total will exceed the main breaker total. On a 42 circuit board at 15 amp breakers the total will come to 630 amps. The way code looks at it is that not all circuits will be on at once and not all at full load. The main breaker only protects the service entrance wires. If the amperage of the main service wires becomes greater than that of the wire rating then the main breaker will trip.
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Can you add a 20 amp breaker to main breaker if total breaker amp is 320 amp Main breaker max is four 150 amp breaker?
No, you cannot add a 20 amp breaker to a main breaker if the total breaker amperage already exceeds the main breaker's capacity. In this case, your main breaker can only support up to four 150 amp breakers, which equals 600 amps, exceeding the 320 amp capacity. You would need to reconfigure the existing breakers to stay within the main breaker's capacity.
Can you use 6-3 NM wire and 50 amp breakers and 50 amp range cord for a 40 amp max load range?
No, it is not advisable to use a 50 amp breaker with a 40 amp-rated appliance like a range. You should match the breaker size to the appliance requirements. In this case, you should use a 40 amp breaker, 8-3 NM wire, and a 40 amp range cord for the 40 amp max load range.
What does a continuous load on a breaker mean?
A continuous load on a breaker refers to a consistent electrical draw at or near the maximum capacity of the circuit over an extended period of time. This differs from intermittent or fluctuating loads, which have varying power demands. It is important to properly size breakers for continuous loads to prevent overheating and potential fire hazards.
Can you use 10-3 with 30 amp breakers at 90 foot to run a 225 amp max arc welder?
No, using 10-3 wire with 30 amp breakers is not suitable for running a 225 amp arc welder. The wire size and breaker amperage should be appropriately matched to the current requirements of the welder to ensure safety and prevent overheating of the wire. In this case, a larger wire size and breaker amperage would be needed to support the 225 amp maximum draw of the welder.
What happens when you plug a 30 amp appliance into a 50 amp breaker?
If you plug a 30 amp appliance into a 50 amp breaker, the breaker will still function to protect the circuit from overheating due to excess current. However, the appliance may not draw enough current to trip the breaker in case of a fault, potentially causing damage to the appliance. It is generally recommended to match the amperage of the appliance to the appropriate breaker size.
