The upgrade to 200 AMP Service is necessary when you upgrade the service panel in a regular-sized private house. These houses have HVAC systems, electric appliances, electronics, EV car charger, electronics, and modern lighting systems. The service supports houses sized 3,000 to 3,500 square feet. It supports all kinds of electrical needs in a regular private home without an extremely large HVAC system. The conduit for wire for the 200 Amp Service should be at least 2 to 2,5 inches as there are three wires running at once.Ģ00-amp service is a standard type of service for regular-sized new homes.These are 350 MCM copper and 500 MCM aluminum. In this case, use cables with an ampacity of 250 Amps. You may choose to accommodate to NEC 220-2 rule that states that the maximum loading for any branch circuit is 80% of the rating.For over a 150-foot distance, use 250 MCM copper wire and 350 MCM aluminum wire. For a a 100-foot distance, you may need to upsize to 4/0 AWG copper wire or 250 MCM aluminum wire, respectively. If you plan to run cables for a long distance, you should accommodate a voltage drop of 3%.For grounding conductors, the minimum size for is 4 AWG for copper conductors, and 2 AWG for aluminum or aluminum-copper clad conductors.2/0 AWG copper wire is not completely out of the question, but its ampacity is 195 Amp-200 Amp, which will put it at a maximum load, so using 3/0 AWG copper is a better option.Allowable ampacity of 3/0 copper wire is 225 Amp, while the allowable ampacity of 4/0 aluminum wire is 205 Amp. When installing a 200 Amp service, you will need at least 3/0 AWG copper wire or 4/0 AWG aluminum or aluminum copper-clad wire.
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