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.
no .If you max out the sub panel you have 100 amp in the main panel
Yes as long as the combined current from both doesn't exceed the limit of the main.
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.
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.
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.
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.
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.
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.
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.
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.
100 is 50% of 200.
200
100
It is: 200/100 times 100 = 200%
200
100
200 + 100 = 300
The LCM is 200.
It is: 200
100