250 MCM aluminum minimum
In conduit? direct burial? distance?
250 mcm
No, amperage is not additive, but a constant. Think of power as water, its always the same temperature, hot (amps). The pressure is variable (volts). The true answer is undoubtedly more complex, but you get the point. If you need to draw 200 amps you would actually need a 400 amp service because code states you cannot have more than an 80% load on a breaker That's an interesting question and I had to run the theory through my brain a few times to confirm my answer. The answer is if you have a 100A 240V service, you could draw what appears to be 200A from that panel at 120V. If you install 100A 120V single pole breakers on each side of the panel (in reality this would be many breakers but let's keep it simple) then both breakers will operate just fine, giving the appearance of 200A. In reality, however, one breaker actually feeds through to the other breaker. The neutral only carries the unbalanced load so in this hypothetical situation the neutral at the panel carries 0A. So the answer to the question is...if you install ONLY 120v single pole breakers, you can run up to 200A on those circuits (or 80% of that as we have discussed.) But you are only running 100A on each leg of the service conductors and breaker.
First you need to determine if addition of the new breakers will exceed the 200A service under normal operating conditions. If so you will need to go to power company and increase service and put in a larger main panel. If you have the capacity for the extra current you can add a sub-panel and add the breakers there as well as the breakers you will remove from main panel to accommodate the sub-panel breaker. Another way depends on what breakers are in current panel. There are some breakers that can be duplexed in the same space as a single breaker.
2.5 mm twin and earth should do the trick. A 100 kw @ 400 V, 50 Hz,3 Phase at a power factor approximately 0.8 will draw a current ( 100x1000/root 3x400x0.8 )=180.42 A. Breaker rating to be 200A TP MCCB and cable size to be minimum 4 Core 120 mm2 .
A #1 aluminum wire with a insulation factor of 90 degrees C is rated at 105 amps. Three #1 wires can be installed into an 1 1/2" conduit.
4/0 Aluminum or 2/0 Copper type USE.
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In conduit? direct burial? distance?
250 mcm
As long as you do it according to local code, there's no electrical problem with it.
Absolutely not. #2awg conductors are only good for about 100 amps depending on Cu or al. see nec table 310-16.
Doing it yourself or hiring an electrician? Yourself: About $300. An Electrician: About $2000
A 3/0 copper conductor with an insulation factor of 90 degrees C is rated at 225 amps.
200A
200 is composite.
No, if the UL Rated Listing for the Panel is 200A than that's it. You cannot have 300A flowing through a 200A Panel.