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Q: Is a main breaker required in a load center?
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What size main breaker do you need to run 10 gauge wire?

The size of the main breaker depends on the maximum current rating of the 10 gauge wire and the load it will be powering. Typically, a 10 gauge wire is rated for a maximum current of 30 amps. Therefore, a 30 amp main breaker would be suitable for running 10 gauge wire. However, it is important to consult local electrical codes and consider the specific load requirements before making a final determination.


You have an elecwaterheater it blows the20amp in line breaker and the 50 amp main?

For a main breaker to trip under these circumstances the rest of the panel is becoming close to its load rating. When the 20 amps breaker trips the rest of the panel is close to or over 30 amps, the 20 amp breaker takes it over the top. What trips a HWT breaker is usually a faulty heating element. It could be the top one or the bottom one.


What determines the size of a main breaker distribution panel?

The size of a main breaker distribution panel is determined by the maximum electrical load that will be connected to it. This includes factors such as the total amperage requirements of all the circuits it will supply, as well as any future expansion needs. It is important to choose a panel with a main breaker that can safely handle the total load without tripping.


How do you replace a 15 amp breaker in the circuit box?

To replace a 15 amp breaker, first shut off the main power to the circuit box. Then, remove the cover of the circuit box and unscrew the old breaker. Disconnect the wires attached to the old breaker, connect them to the new 15 amp breaker, and securely screw it in place. Finally, turn the main power back on to restore electricity.


What would happen if a 200 amp breaker is used in a 100 amp sub panel?

There are two things to think about here. First of all a 200 amp breaker will not physically fit into a 100 amp panel. This is so designed because the panel buss is not designed to conduct 200 amps before the current is cut off. A 100 amp rating on the panel is the maximum amount of current that the manufacturer states, that can be handled safely. Second if the 200 amp breaker is in the main panel then everything downstream from that breaker has to be rated for 200 amp conductivity. The wire size will have to be 3/0 from the breaker to the first over current device in the sub panel which will be the sub panel's main breaker. The sub panel can not be a load center but will have to be a combination panel. I doubt that the 100 amp sub panel's main breaker lugs would be large enough to connect the 3/0 cable.

Related questions

What size main breaker do you need to run 10 gauge wire?

The size of the main breaker depends on the maximum current rating of the 10 gauge wire and the load it will be powering. Typically, a 10 gauge wire is rated for a maximum current of 30 amps. Therefore, a 30 amp main breaker would be suitable for running 10 gauge wire. However, it is important to consult local electrical codes and consider the specific load requirements before making a final determination.


What is the minimum size breaker panel required for a homes main service?

50 amps


What prevents the main circuit breaker and the mission essential circuit breaker of the secondary distribution center from being energized simultaneously?

an interlocking device


Why does your main circuit breaker trip when your dryer runs 15 minutes Is it because your vent needs to be cleaned?

Could be but you could also have a weak breaker that will no longer hold the load of your dryer. That is if your talking about your dryer breaker tripping. If your "main breaker" is tripping you have a different problem. Call an electrician in that case. A plugged up dryer shouldn't be tripping your main


Is it OK to have 250 A of breakers in a 100 A panel?

Yes. Many installations have breaker totals higher that the main breaker of the panel. It is worked on a percentage basis. Not all of the breakers will be on at the same time. In a home, on a 100 amp panel the average load is 50 - 60 amps. The 100 amp main breaker is protecting the 100 amp rated panel board. If the load current goes higher that the panel board is rated at, the main breaker will trip to protect the board.


Can you use a main lug panel for your home or do you have to use a panel with a main breaker?

The service distribution needs to have a disconnect from the utility supply. Most homes use a combination distribution panel. If the home owner wants to have a load center installed then there has to be a fused disconnect ahead of the panel. The less costly of the two options is the combination panel. Labour costs drive the load center, main service switch option much higher because there are more materials to assemble.


Does a residential condo require a main breaker in each unit?

No, a residential condo does not require a main breaker in each unit. Typically, the main breaker is located in the electrical room or utility room of the building, and it controls the power supply to all the units. Each unit may have individual circuit breakers, but a main breaker is not required in each unit.


What can you do to fix a circuit which is burned out in a load center?

If the circuit has not damaged the bus bars in the distribution panel just change the breaker out for a new one. If the wire insulation has burned you might want to think about changing the wire for a new one. Wire burn back is caused by loose terminal connections at the breaker. As a general maintenance procedure shut off the main breaker and go over all of the breaker terminal connections to make sure that they are tight.


You have an elecwaterheater it blows the20amp in line breaker and the 50 amp main?

For a main breaker to trip under these circumstances the rest of the panel is becoming close to its load rating. When the 20 amps breaker trips the rest of the panel is close to or over 30 amps, the 20 amp breaker takes it over the top. What trips a HWT breaker is usually a faulty heating element. It could be the top one or the bottom one.


You lost a voltage leg by connecting the ground wire to the circuit breaker but com ed wires are still energized?

Yes this could be true. The breaker to the load will have tripped. The main breaker should still be allowing voltage to the distribution panel because it did not trip. If the main breaker tripped then the distribution panel must have been close to maximum amperage and the shorting of the branch circuit was enough to trip the mains.


When a voltage leg is lost by connecting the ground wire to the circuit breaker are com ed wires still energized?

Yes this could be true. The breaker to the load will have tripped. The main breaker should still be allowing voltage to the distribution panel because it did not trip. If the main breaker tripped then the distribution panel must have been close to maximum amperage and the shorting of the branch circuit was enough to trip the mains.


What is the main function of an electric circuit?

The purpose of an electrical panel board or electrical distribution panel is to supply individual circuits from the main distribution board. As the board is supplied with one circuit of high capacity , it needs to be broken down into smaller branch circuits. Breakers accomplish this obligation by plugging into the panels main bus-bars. The load side of the breaker then goes to the specific load. The size of the breaker is dependant upon the size of the load of that circuit. The conductor that feeds the load is dependant upon the size of the breaker feeding that load.