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Search the building code.

Every 2024 IRC section and the IBC as it loads, by number or topic, plus the local rules for your city. Free to search.

Detached houses, duplexes and townhouses up to 3 stories with their own exits use the IRC; every other building uses the IBC (IBC 101.2).

A random sample from 677 sections for San Antonio, TX, the 2024 IRC

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  • E3704.3

    Feeder Neutral Load

    • The feeder neutral carries the maximum unbalanced load; for ranges, ovens, cooktops and dryers use 70% of the ungrounded load (NEC 220.61).

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

  • E3705.3

    Adjustment Factor for Conductor Proximity

    • More than three current-carrying conductors in a raceway or cable, or cables bundled over 24 in, are derated; not for nipples of 24 in or less, and AC/MC rules differ (NEC 310.15(C)(1)).

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

  • E4304.3

    Class 2 Circuits With Communications Circuits

    • Class 2 conductors may share a listed communications cable installed per NEC Article 800 Part V (NEC 725.139(D)).

    International Residential Code, 2024 · Chapter 43, Class 2 Remote-Control, Signaling and Power-Limited CircuitsRead the full text (opens UpCodes in a new tab)

  • E3905.5

    Boxes Enclosing Flush-Mounted Devices or Flush Equipment

    • Boxes for flush devices enclose them on back and sides, and box-mounting screws don't hold the device (NEC 314.19).

    International Residential Code, 2024 · Chapter 39, Power and Lighting DistributionRead 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.

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