A breaker should never be fed from its load side to energize the bus in the breaker distribution panel. This question suggests that you are trying to connect a generator to back feed your electrical panel during a power failure. This setup as killed linemen trying to repair the downed primary lines. If the panels main breaker is not opened, the generator will back feed the pole transformer that the linemen are working on and bring the line potential up to 14,000 volts. There are proper change over switches in the market now that will allow you to run your generator and the switch will automatically disconnect the utility connection before making the connection to the house panel. If this is your line of thought, do a bit of research on the subject. The last thing people in the trade want to hear is another lineman getting electrocuted.
If the load exceeds the rating of the breaker and the breaker is functioning properly, it will trip.
To de-energize a circuit, the voltage has to be cut off at the source. This is usually done with a disconnect switch which is located just before the circuit's load. Turning off the breaker on a distribution panel will de-energize the circuit it is feeding. To make sure that the voltage can not be turned back on when work is being done on the circuit, the switch or breaker must have a lock off device to prevent the circuit from being turned on, except by the person that locked the circuit off.
In the CEC there is no definition for a load center. In layman terms a load center is; A distribution panel that does not have a disconnect breaker in the same enclosure. A distribution panel that does have a disconnect breaker within the enclosure is called a combination panel.
If you are talking about a breaker in a house panel then a 15 amp breaker would be used. It is the smallest amperage breaker that you will find in a house panel.
If the circuit breaker to a dryer, or to any load, keeps getting hot and trips the breaker, then either the load is pulling too much current or there is a loose connection in the breaker or breaker panel. Either condition must be fixed to reduce the risk of fire.
Look to see if the 30 amp panel is fed with a two wire or a three wire. If it is a two wire then you are out of luck. If the panel is fed with a three wire then the panel should have the neutral terminated in the panel. It is this neutral that you need for 120 volt connections. You didn't state how many panel slots there are in the panel. If you are able install a 15 amp breaker into the panel and connect the wires going to the load. The black wire will go to the breaker and the white wire will go to the neutral bar in the panel.
To de-energize a circuit, the voltage has to be cut off at the source. This is usually done with a disconnect switch which is located just before the circuit's load. Turning off the breaker on a distribution panel will de-energize the circuit it is feeding. To make sure that the voltage can not be turned back on when work is being done on the circuit, the switch or breaker must have a lock off device to prevent the circuit from being turned on, except by the person that locked the circuit off.
In the CEC there is no definition for a load center. In layman terms a load center is; A distribution panel that does not have a disconnect breaker in the same enclosure. A distribution panel that does have a disconnect breaker within the enclosure is called a combination panel.
If you are talking about a breaker in a house panel then a 15 amp breaker would be used. It is the smallest amperage breaker that you will find in a house panel.
If the relay contacts are in series with a connected load, then the load will energize.
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.
If the circuit breaker to a dryer, or to any load, keeps getting hot and trips the breaker, then either the load is pulling too much current or there is a loose connection in the breaker or breaker panel. Either condition must be fixed to reduce the risk of fire.
If you mean can you put a single 20 amp breaker in an electric panel, the answer is yes. An electric panel is typically made to handle more breakers with values that add up to more than the rating of the panel on the supposition that you will never draw full load on all breakers. If you do the main breaker would trip. In your case you are under utilizing the panel, but this is not a problem.
You can. Using these size breakers in a 60 amp sub panel might be pushing the limit for breaking the sub panels feeder breaker. The breaker feeding the sub panel will have to be no bigger than 60 amps because of the main bus bar capacity of the sub panel. It would be better to install a 100 amp sub panel and then there would be a bit of a buffer and you will have the ability to add additional small load circuits.
Look to see if the 30 amp panel is fed with a two wire or a three wire. If it is a two wire then you are out of luck. If the panel is fed with a three wire then the panel should have the neutral terminated in the panel. It is this neutral that you need for 120 volt connections. You didn't state how many panel slots there are in the panel. If you are able install a 15 amp breaker into the panel and connect the wires going to the load. The black wire will go to the breaker and the white wire will go to the neutral bar in the panel.
An electrical panel schedule is the index that you find on the inside of the door to the distribution panel. If the panel has no door the index is usually stuck on the face of the panel. The label has numbers on it that correspond to the breakers inside the distribution panel. A description of what the breaker feeds is written in the space next to the breaker number. Electricians usually write this description in pencil so that the description can be changed if the breaker's load is changed.
Meter 'tails'.
In North America a two pole breaker will be used in the distribution panel for a supply of 240 volts for a 240 volt load.