However, some people recommend using the #2 AWG aluminum wire for the 100 amps sub panel because it has a lower conductivity than copper wires. The wire must go inside a minimum of 1.25 inches, and schedule 40 or 80 PVC electric conduits for underground service. When installing the #4 AWG copper wire in the sub panel, you should take the necessary steps to secure the wire from any unwanted occurring. Generally, these two wires have the amperage and Gauge rating that is ideal and suitable for the sub panel. However, the ideal and recommended wires for the 100amp sub panel to power up a medium-sized house is the #4 AWG or #2 AWG aluminum wire. There is a variety of wires available to use in a 100 amp sub panel. Generally, the NEC rule indicates that the wire should not hit more than 80% of its electric supply.Ĭonsidering that, you need to follow the rules and regulations properly to power your house using a 100 amp sub panel. The NEC rule provides us with the proper guideline regarding any electrical work and eases the effort. In addition to that, you should always follow the NEC rule when choosing the wire for a sub-panel. You need to choose the right type of wire for your electrical sub panel.īecause choosing the wrong wire may not be able to suit the electric flow and cause a lot of nuisances. Generally, wiring is one of the most essential parts of electrical work that is being done to ensure proper power supply throughout the house. You should make sure that the wire you are using to run 100 amps up panel should be sufficient to the amperage of the sub panel to provide you with proper electricity flow. Generally, the wire that is suitable to run a 100amp subpanel is #4 copper wires or #2 aluminum wires. Generally, a 100 amp sub panel requires #4 copper wires or #2 aluminum wires. When choosing the wire for a 100 amp subpanel, you need to make sure that the wire gorge is sufficient for the amperage of the sub panel. Generally, the #4 AWG has 85A ampacity but should conduct at most 68 amps. It is ideal to wire the circuit to hit 80% ampacity. When running the subpanel, you should never put the circuit under 100% ampacity.
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