1/9/2024 0 Comments 200 amp breaker wire sizeHe will be in a better position to apply all NEC codes, permits and safety practices. If you cannot do it yourself, call a licensed electrician. Avoid using the wrong size wire for the installation. ConclusionĪs you can see from this article, the correct wire size for 200 amp service is 4/0 awg. Watch this video to learn how to install a 200 amp circuit. You should weigh their pros and cons before making your choice. On the other hand, aluminum wires are more prone to corrosion and require larger sizes to handle the same amperage. The one you use determines your wire size.Ĭopper wires are better conductors of electricity, thou more expensive but can handle very high current. Type of wire usedĬopper and aluminum are the most common wires used in electrical installation. If you check the wire size chart above, you see that the 350 KCMIL wire is perfect for 200 amp service 100 feet away. Now, let’s look for a wire with 312 A ampacity. Here is the formula: Power (Watts) = Current (Amps) × Voltage (Volts)Ģ00 amp wire 100 feet away = 260 A x 1.2 = 312 A. The law requires you to increase the amps by 20% on every 100 ft distance. Let’s say you are to install a 200 amp electrical service 100 feet away from the main panel. The voltage drop rule helps to account for voltage loss when running a long distance service wire. Voltage drop is the loss of voltage that occurs when the current flows through a conductor because of its resistance. The 260 amp circuit will require a 4/0 gauge for maximum performance. So the perfect size wire for 200 amp service is 4/0 awg. If you check the wire gauge ampacity table, you will see there is no 240.96 amp there, so we use the next closest ampacity, which is 260 A. You can get this by dividing 200 amp with 83% or 0.83. Note: This 83% rule only applies to single-phase services rated between 100 to 400 amps. This is to ensure safety and to prevent overloading. The NEC 83% rule is a guideline set by the National Electric Code (NEC) for determining the maximum load a circuit can handle.Īccording to 2017 NEC 310.15(B)(7), the maximum load a 200 amp circuit should carry must not exceed 83% of the circuit’s capacity. These include the NEC 83% rule, voltage drop rule, type of wire used and whether it is surface or underground wiring. In order to get the right wire size for your 200 amp electric service, there are some factors you must consider. How to determine the right size wire for 200 amp service He can guide you through the permit process and ensure that the installation is standard. When planning to upgrade to a 200-amp service or any other significant electrical work, it is always recommended to contact a licensed electrician who is familiar with local regulations. It also allows for inspections to be conducted to verify that the installation meets the standards. Getting a permit will ensure that the electrical work is done safely and in compliance with the applicable codes. It is essential to consult with your local building department or relevant authority to determine the specific permit requirements for your location. Electrical work of this nature requires a permit. Yes, a permit is necessary before installing 200 amp service. Ground wire: A home that uses 200 amp breaker will also require the same ground wire for earthing. Solar panel system: Solar panels generate direct current that needs to be converted to alternate current before use.Ī 200 amp wire is used to connect the panels to the inverter, which converts the DC to AC that can be used in the house. 200 amp wire is used to supply the required current for quicker charging of vehicles.Ĭommercial and industrial electrical systems: Large commercial and industrial buildings often require more power than residential houses.Ī 200 amp solid wire size is used to supply power to the machinery, lighting, and HVAC systems. It can deliver enough power required to run large appliances and electronic devices.Įlectric motor charging stations: As electric vehicles become popular, the demand for high power charging stations is increasing. Residential electrical service: A 200 A wire is used to connect the residential service panel to the main service lines. Below are some areas where you can use the 200 amp gauge wire. 5 Conclusion Areas where you can use 200 amp wire sizeĪ 200 amp wire is a heavy duty electrical wire used in areas that require high current flow.
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