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The 240.4(B) 'next size up' rule allows rounding up the overcurrent device only up to what rating?

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  1. 100A or less
  2. 800A or less
  3. 2,000A or less

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References

  1. EC&M: Protecting Conductors Part 3 www.ecmweb.com/maintenance-repair-operations/article/20901392/protecting-conductors-part-3 Checked 2026-10-10.

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Trades & ShopUnder 240.4(D), the maximum overcurrent device for 14 AWG copper is how many amps?Trades & ShopFor conductors 18 AWG to 10 AWG, what two things limit the size of the overcurrent device?Trades & ShopOne ohm of resistance is defined as one volt for every what?

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