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Yes you can, but it is all about distribution of the load. You still have a maximum limiting current of 150 Amps. So if you did use 100 amps on the sub-panel that would only leave 50 amps on the main. Since power usage is usually not constant and varies by day and situation, you just need to make sure the load is distributed so you don't start tripping breakers.

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12y ago
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12y ago

no .If you max out the sub panel you have 100 amp in the main panel

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12y ago

Yes as long as the combined current from both doesn't exceed the limit of the main.

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12y ago

Yes, as long as you ensure that the feed to the subpanel is protected by a 100 Amp breaker and realize you can't overload the subpanel. Connect the subpanel with 3 AWG copper wire.

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Q: Can you use a 200 amp subpanel on a 100 amp branch circuit?
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What wire size will carry 50 amps 200 ft 220 voltage?

Actual voltage would be 240V. 4 AWG copper is capable of carrying 50A. At 200 ft, with a 50A load, voltage drop would be about 6V, which is within the acceptable 3% voltage drop for a branch circuit.


How much you can use in 200A breaker?

200. Although you cannot exceed current ratings on any branch circuit without tripping that circuit. You need to make sure that you do not exceed 160 continuous load amps to meet NEC requirements of not overloading a breaker to more than 80% under continuous load.


Can you run an additional breaker panel parallel to the existing one?

It is not in parallel. You put a breaker in existing panel and use that to feed the subpanel. The Amperage of this subfeed breaker should match the rating of the new panel. For example a 100A breaker might be typical. Remember that ground and neutral are only "bonded" at the main panel. Usually a subpanel has a means to separate the neutral and ground in a subpanel. Be careful since everything about doing this is dangerous.Another AnswerYes, you can have two breaker panels in parallel. If you had a 100 amp panel on a 200 amp service (or increase the size of the service, check with your power company on the size of your service, you could add a second 100 amp panel in parallel with the first. You can have up to 6 disconnects per service, but they must be located adjacent to each other or in the same enclosure. So either install the second panel beside the first or a 100 amp disconnect beside the first panel and feed out of the disconnect to the new panel located where you need it.


Can you use aluminum service cable to feed a sub panel?

Yes, as long as it has the necessary ampacity for the load and is properly fastened at each terminal. For example, we have a 4/0 aluminum cable feeding our 200 A subpanel 120 feet away.


Can you tap off of a 200 amp service for 2 100 amp panels?

Yes, but at every reduction in wire size there has to be a breaker sized to the smaller wire size. The wire size for 100 amp panels is recommended at #3 copper conductor. From the 200 amp feeder panel you will require a 100 amp two pole breaker for each of the two 100 amp services. Keep in mind that if you run the 100 amp services close to maximum this will take away the capacity of the 200 amp service for other branch circuits coming off of it. Also keep in mind that if the panels are located, not in the same building as the 200 amp service that the 100 amp panels will be treated as separate services and will have to be constructed like a 100 amp service. This includes ground rods. Also the bonding screw will have to be removed that connects the neutral buss to the panel enclosure.

Related questions

How do I add new circuits to an 100 watt electrical box from the 1970'sIt has two open slots on the bottom and should I add a subpanel or upgrade the whole box I am disabled and have ltd resources?

It depends on what you are adding for a load. There is nothing wrong with what you have, but if you have more than two circuits to add, a subpanel is your answer if the loads are lighting or other small stuff. Pricewise and ease of installation equals a subpanel. If adding larger loads, an upgrade to 200 amps is necessary.


Can I use 200 watt siren if originally my unit come with 100 watt siren?

It depends on the circuit that controls the siren. The circuit may be designed for only a 100 watt device and by doubling the current through the circuit, the circuit may be destroyed.


What is 100 percent of 200?

100 is 50% of 200.


What is 158 rounded to nearest 100?

200


What is 137 rounded to the nearest hundred?

100


What pecent of 100 is 200?

It is: 200/100 times 100 = 200%


What is 165 rounded to the nearest hundred?

200


What is 200 divided by 2?

100


What is 100 plus 200?

200 + 100 = 300


What the answer of the LCM of 100 and 200?

The LCM is 200.


What is 237 rounded to the nearest 100?

It is: 200


What is 136 rounded to nearest hundred?

100