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What size circuit breaker should be used on 125 feet of 4 AWG power feed?
Wiki User
∙ 8y ago
The circuit breaker is used to protect the conductor that is connected to it from an overload condition. On a motor load the breaker has to be sized 250% of the motors full load amperage. Some circuits can be only loaded to 80% capacity and this is governed by the sizing of the breaker. Without knowing what the load amperage is, this question can not be answered.
Wiki User
∙ 8y ago
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What size in amperage circuit breaker should be used for a pool pump?
The sizing of the circuit breaker and hence the wire size to feed the pump are all dependant upon the amperage of the pump. This question can not be answered without that information.
Why did the breaker trip when you unscrewed a burnt out bulb?
This is a condition that should not happen under normal conditions. In North America the smallest home breaker is 15 amps. If a fault current is higher that the breaker setting the breaker will trip.The only way the breaker could have tripped is, if when screwing the bulb out, the feed wires feeding the light socket turned and shorted out against each other.Turn the power feed off and thoroughly check the feed wires. Make sure that the insulation is good all the way to the terminal points.As a side note, if the circuit that the fixture is connected to is fully loaded to say 13 amps it would only take an additional 2 amps to trip the breaker. If the bulb flashed when you started turning the bulb out, this is most likely what happened.
What do you think would happen if you put a 3A fuse in a plug used for kettle?
I know what would happen. The three amp fuse would blow. Any device that is plugged into a receptacle with out having sufficient resistance to limit the current flow will dead short the circuit and cause the breaker that feeds the circuit to trip. In this case the fuse being of a lower rating that the feed breaker the fuse will blow without tripping the receptacle's feed breaker.
Can a 20 amp circuit breaker operate two 15 amp receptacle?
It is perfectly acceptable to have (2) 120 volt 15 amp receptacles operated from a 120 volt 20 amp circuit breaker (as a general rule of thumb 11 receptacles are acceptable on a 20 amp circuit). The 15 amp rating of the receptacle is the maximum allowed amperage that should be hooked up to the receptacle at any one time. So in this case the limiting factor is the amount of current being drawn across both receptacles simultaneously should not exceed the 20 amp rating of the circuit breaker. In the United States the NEC code allows the use of a 20 amp circuit breaker to feed a branch circuit consisting of 15 amp receptacles. Generally you would not exceed 11 receptacles though as you will assume an average load of 1.5 amps per receptacle and trying to maintain about 80% max load.
Which terminal on a 15 amp household breaker does the hot wire feed into and which one does it come out?
On a 15 amp household breaker there is no terminal on the in feed of the breaker. The breaker either plugs into the distribution panel's bus bar or it bolts to the distribution's bus bars. The feed conductor connects to the load side of the breaker at its terminal lug.
What size in amperage circuit breaker should be used for a pool pump?
The sizing of the circuit breaker and hence the wire size to feed the pump are all dependant upon the amperage of the pump. This question can not be answered without that information.
How do you repair short circuit when all appliances are tested to work properly?
If the appliances all test out and are found to have no short circuits in them then the next step is to check the supply conductors that feed the appliances. This can be easily done by unplugging the appliances and turn on its circuit breaker. When voltage to the appliance circuit causes the breaker to trip. this is the circuit with a fault on it. The most likely place is at the receptacle where the appliance plugs into the power supply. Turn the circuit off at the breaker and inspect the receptacle. If it looks suspicious change it out with a new one.
Will manually turning off a shunt trip breaker set off the fire alarm?
Manually turning off a shunt trip breaker should not set off the fire alarm. The only way that the breaker could set off the fire alarm when turned to the off position is if there is an auxiliary contact on the breaker connected to the fire alarm circuit. This is not usually done because the breaker should be able to be turned off when doing maintenance on the breakers circuit. If the breaker is a mandatory feed breaker to a piece of fire alarm equipment and shouldn't be left in the off position it might have a trouble circuit connected to the fire alarm panel. A trouble alarm on a fire alarm panel is different from an alarm circuit alarm.
Why would power go off and on in 3 rooms and no circuit breaker tripped?
You have a loose connection somewhere. May be at the service panel itself. Check the circuit feeding those rooms at the breaker and check the neutral wire connection. If they are good these rooms may be feed out of a junction box which should be accessible if it was wired to code. Find that junction box and check all the connections. These are sometimes very hard to find.
What size wire to feed a panel with 50A breaker for hot tub and 20A branch circuit?
#6 3 conducter
Can you use a 2 pole 60 amp breaker to feed one circuit?
No, you cannot use one in place of the other.
What size circuit breaker should be used if you use 5 horsepower of air-conditioning?
To answer this question a voltage value must be given. Circuit breakers protect the conductors that feed the load. The lower the voltage value, the higher the current value, hence a larger the wire size is needed and therefore larger the breaker size for the circuit. In reverse the higher the voltage value, the lower the current value, hence a smaller the wire size can be used therefore smaller the breaker size for the circuit.
Why did the breaker trip when you unscrewed a burnt out bulb?
This is a condition that should not happen under normal conditions. In North America the smallest home breaker is 15 amps. If a fault current is higher that the breaker setting the breaker will trip.The only way the breaker could have tripped is, if when screwing the bulb out, the feed wires feeding the light socket turned and shorted out against each other.Turn the power feed off and thoroughly check the feed wires. Make sure that the insulation is good all the way to the terminal points.As a side note, if the circuit that the fixture is connected to is fully loaded to say 13 amps it would only take an additional 2 amps to trip the breaker. If the bulb flashed when you started turning the bulb out, this is most likely what happened.
What is the place in the home that contains the circuit breakers?
The ciruit breaker box. This is usually mounted near the main power source in the home. Try the basement, the back porch, or near the kitchen. If all else fails, go outside and look where the power meter is. The breaker box should be nearby inside the home. In many homes the electrical panel is in the basement. In homes that do not have basements the electrical panel is placed in the garage.
What do you think would happen if you put a 3A fuse in a plug used for kettle?
I know what would happen. The three amp fuse would blow. Any device that is plugged into a receptacle with out having sufficient resistance to limit the current flow will dead short the circuit and cause the breaker that feeds the circuit to trip. In this case the fuse being of a lower rating that the feed breaker the fuse will blow without tripping the receptacle's feed breaker.
I have a Transformer 480 primary 208 secondary feeding 1 200amp mb 42 space panel I need to feed a subpanel 6 ft away I'm thinkin feed through lug at top of bus or at feed through MB suggestions?
The sub-panel need to be fed from the main panel, by way of a circuit breaker connected to one of the breaker locations. Or if your sub-panel has a main breaker installed you can feed from the main panel with a sub-feed lug kit. This looks like a breaker, but is only a point where you can branch off the sub panel.
Can you reverse feed a residential 2-pole circuit breaker?
Yes. This is the way small residential transfer switches connect the generator to the system. The breakers are bidirectional.
