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How can a 30 Amps fuse for a shower of 9.5KW be replace with a 40 Amps fuse on RCD trip?
If the current safety requirement is 30 amps, you can;t run if off of a larger circuit breaker. It violates NEC and is very unsafe. If the current requirement is 40 amps , it will continuously trip a 30 amp breaker because it is too small of a breaker in electrical requirement.
How many amps does it take to trip a 15 amp breaker?
It usually takes more than 15 amps to trip a 15 amp breaker, as breakers are designed to protect against overcurrents. However, factors like ambient temperature, length of wiring, and type of load can affect this. It is recommended to consult the manufacturer's specifications for the exact values.
How many volts can you draw off of a 15amp breaker?
On a 15 amp breaker, you can draw up to 120 volts in a standard residential circuit. The voltage remains constant at 120 volts, but the amperage capacity is what is limited by the 15 amp breaker.
I have a 15 amp tool hooked up to a 15 amp breaker- This trips the breaker even with nothing else running- There is also a GFCI outlet on the same circuit- Is the breaker or GFCI bad?
It is likely that the 15 amp tool is drawing more current than the breaker can handle, causing it to trip. The GFCI outlet might not be the issue here unless there is a ground fault causing it to trip. Consider using the tool on a circuit with a higher amperage breaker to prevent tripping.
How much current does it take to trip a 30 amp automotive circuit breaker?
In a typical US automobile, a 30 amp fuse will sustain a constant load of 360 watts. Fuses and circuit breakers perform on an "I squared t" rule. For example, a 30 amp fuse will not blow on 31 amps for a very long time. A 20 amp breaker can take anywhere from 10 minutes to two hours to trip on 25 amps. We simply dumb it down so that laymen and technicians need not make mistakes. Power on seven 100 watt light bulbs simultaneously. That means a circuit suddenly provides 50 amps. 50 amps does not trip a 15 amp or 20 amp breaker, again, due to the "I squared t" rule. A 50 amps load only exists for tens of milliseconds. Not long enough. A 30 amp continuous appliance will not trip a 30 amp breaker. But a safety margin means limiting 30 amp appliances to 26 amps or less. Meanwhile, an 18 gauge lamp cord wire typically rated for 10 amps will actually conduct up to 50 amps continuously. Again, that wire is oversized for other safety reasons. And to keep it simple. These concepts apply to fuses vehicles and structures.
