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- For a 400 Amp underground service, the recommended cable sizes are as follows:
- Aluminum wire: 750 kcmil (750 MCM) or 1000 kcmil (1000 MCM) at 194°F, or 1000 kcmil (1000 MCM) at 167°F.
- Copper wire: 600 kcmil (600 MCM) for both 167°F and 194°F.
- For a 140°F underground service, use 1250 kcmil aluminum or 750 kcmil copper cables123.
Learn more:âś•This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.A 400 Amp service panel and 400 Amp meter base require a 750 kmil (750 MCM) 0r 1000 kcmil (1000 MCM) aluminum wire at 194°F or only 1000 kcmil (1000 MCM) at 167 °F. For copper wire, you will need 600 kcmil (600 MCM) copper wire for both 167 °F and 194°F. For a 140 °F underground service, 1250 kcmil aluminum and 750 kcmil copper cables are optimal.nassaunationalcable.com/blogs/blog/which-cables …For a 400 amp service with aluminum, aim for a 1,000 kcmil wire. And for the ground, a 1 AWG aluminum wire should do the trick. So here’s a quick recap for you: Copper: Go with 600 kcmil for the main wire and 3 AWG for the ground. Aluminum: Opt for 1,000 kcmil for the main wire and 1 AWG for the ground.toolsweek.com/what-size-wire-for-400-amp-service/As we can see from this screenshot, we need either:
- 600 kcmil copper wire for 400 amp service. It has 420A ampacity; more than the minimum required 400A ampacity.
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The best wire size for a 400 amp service is 1,000 kcmil aluminum or 400 kcmil gauge copper wire considering 167°F overload. However, if you are going for 140°F underground wiring, then use 1,250 kcmil aluminum or 600 kcmil gauge …
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Oct 1, 2023 · The correct ground wire size to use for a 400-amp service typically depends on the gauge cable used for the panel. Assuming that the service panel uses a 700 kcmil copper wire, a ground wire that can handle 5,000 amps …
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