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• E3705.4

  Temperature Limitations

  • Conductor temperature rating is coordinated with the lowest-rated termination; higher-rated insulation may be used for derating (NEC 110.14(C)).

  International Residential Code, 2024 · Chapter 37, Branch Circuit and Feeder RequirementsRead the full text (opens UpCodes in a new tab)

• E3705.4.1

  Conductors Rated 60°C

  • Terminations for circuits of 100 A or less or 14-1 AWG use 60°C ampacity unless listed higher; B, C, D design motors may use 75°C (NEC 110.14(C)(1)(a)).

  International Residential Code, 2024 · Chapter 37, Branch Circuit and Feeder RequirementsRead the full text (opens UpCodes in a new tab)

• E3705.4.2

  Conductors Rated 75°C

  • Terminations for circuits over 100 A or conductors larger than 1 AWG use 75°C ampacity unless listed higher (NEC 110.14(C)(1)(b)).

  International Residential Code, 2024 · Chapter 37, Branch Circuit and Feeder RequirementsRead the full text (opens UpCodes in a new tab)

• E3705.4.3

  Separately Installed Pressure Connectors

  • Separately installed pressure connectors are used at no more than their listed temperature ampacity (NEC 110.14(C)(2)).

  International Residential Code, 2024 · Chapter 37, Branch Circuit and Feeder RequirementsRead the full text (opens UpCodes in a new tab)

• E3705.4.4

  Conductors of Type NM Cable

  • NM-B conductors are 90°C but limited to 60°C ampacity; more than two touching cables through one sealed or insulated bore are derated with no 10 ft exception (NEC 334.80).

  International Residential Code, 2024 · Chapter 37, Branch Circuit and Feeder RequirementsRead the full text (opens UpCodes in a new tab)

• E3705.4.5

  Conductors of Type SE Cable

  • Indoor SE cable 10 AWG and smaller in contact with insulation uses 60°C ampacity (NEC 338.10(B)(4)(a)).

  International Residential Code, 2024 · Chapter 37, Branch Circuit and Feeder RequirementsRead the full text (opens UpCodes in a new tab)

Searches all 4,276 IRC 2024 sections, 5,532 IBC 2024 sections and defined terms (Chapters 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33 so far) and each city's local rules as they are added. Section numbers and titles from the International Residential Code and International Building Code, 2024 editions, copyrighted by the International Code Council; the IRC's electrical chapters (34 to 43) follow NFPA 70, the National Electrical Code. Requirements are summarized in our words (IRC Chapters 3 to 43, IBC Chapters 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33); read the full text at the link on each result. Local values come from each city's published documents.