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Under 240.4(D), the maximum overcurrent device for 14 AWG copper is how many amps?

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  1. 20A
  2. 25A
  3. 15A

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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 & ShopFor conductors 18 AWG to 10 AWG, what two things limit the size of the overcurrent device?Trades & ShopThe 240.4(B) 'next size up' rule allows rounding up the overcurrent device only up to what rating?Trades & ShopIn a box fill calculation, each 14 AWG conductor counts as how many cubic inches?

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