Electrical Systems

Grounded in the retrieved California Residential Code — click a citation to read the verbatim passage:

• CRC § 2.1 Medium relevance — show source text

  SECTION BO104—REPAIRS

  BO104.1 General. Repairs shall comply with the applicable provisions of this code for new construction or as permitted by this appendix.

  BO104.2 Materials. Materials used during repairs shall comply with this section.

  BO104.2.1 New and replacement materials. Except as otherwise required or permitted by this code, materials permitted by this code for new construction shall be used. Like materials shall be permitted for repairs and alterations, provided that unsafe conditions are not created. Hazardous materials shall not be used where this code would not permit their use in buildings of similar occupancy, purpose and location.

  BO104.2.2 Existing materials. Materials already in use in a building in compliance with requirements or approvals in effect at the time of their erection or installation shall be permitted to remain in use unless determined by the building official to be unsafe.

  BO104.2.3 Plumbing materials and supplies. The following plumbing materials and supplies shall not be used:

  1. All-purpose solvent cement, unless listed for the specific application.
  2. Flexible traps and tailpieces, unless listed for the specific application.
  3. Solder having more than 0.2-percent lead in the repair of potable water systems.

  BO104.3 Water closets. Where any water closet is replaced with a newly manufactured water closet, the replacement water closet shall comply with the requirements of Section P2903.2.

  BO104.4 Electrical. Repair or replacement of existing electrical wiring and equipment shall comply with Chapters 34 through 43.

  BO104.5 Structural. Repaired structural elements and systems shall comply with Section R102.6.1 and the structural provisions of this appendix.

  SECTION BO105—ALTERATIONS

  BO105.1 General. Alterations to existing buildings shall comply with the provisions of this code for new construction, except as permitted by Sections BO105.2 through BO105.8. Engineered design in accordance with Section R301.1.3 shall be permitted to meet the requirements of this section. Alterations shall not cause the existing building to become less compliant with the provisions of this code for new construction than the existing building was prior to the work.

  BO105.2 Newly constructed elements. Newly constructed elements, components and systems shall comply with the requirements of this code.

  Exceptions:

  1. Added openable windows are not required to comply with the light and ventilation requirements of Section R325.
  2. Newly installed electrical equipment shall comply with the requirements of Section BO105.5.

  BO105.3 Nonconformities. The work shall not increase the extent of noncompliance or create nonconformity to those requirements that did not previously exist.

  BO105.4 Structural. Altered structural elements and systems shall comply with Section R102.6.1 and the structural provisions of this appendix.

  BO105.4.1 Decreased structural capacity. Where an alteration causes a decrease in capacity in any structural component, that structural component shall be shown to comply or shall be altered to comply with the applicable provisions of Chapters 3, 4, 5, 6 and 8.

  BO105.4.2 Increased design loads. Where an alteration causes an increase in loads as described in this section, the existing structural components that support the increased load, including the foundation, shall be shown to comply or shall be altered to comply with the applicable provisions of Chapters 3, 4, 5, 6 and 8. Existing structural components that do not provide support for the increased loads shall not be required to comply with this section.

• CRC § 1.4.2 Medium relevance — show source text

  R306.1.4.2 Determination of impacts. In riverine flood hazard areas where design flood elevations are specified but floodways have not been designated, the applicant shall demonstrate that the effect of the proposed buildings and structures on design flood elevations, including fill, when combined with other existing and anticipated flood hazard area encroachments, will not increase the design flood elevation more than 1 foot (305 mm) at any point within the jurisdiction.

  3-36 2025 CALIFORNIA RESIDENTIAL CODE

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  BUILDING PLANNING

  R306.1.5 Lowest floor. The lowest floor shall be the lowest floor of the lowest enclosed area, including basement, and excluding any unfinished flood-resistant enclosure that is useable solely for vehicle parking, building access or limited storage provided that such enclosure is not built so as to render the building or structure in violation of this section.

  R306.1.6 Protection of mechanical, plumbing and electrical systems. Electrical systems, equipment and components; heating, ventilating, air-conditioning; plumbing appliances and plumbing fixtures; duct systems; and other service equipment shall be located at or above the elevation required in Section R306.2 or R306.3. If replaced as part of a substantial improvement, electrical systems, equipment and components; heating, ventilating, air-conditioning and plumbing appliances and plumbing fixtures; duct systems; and other service equipment shall meet the requirements of this section. Systems, fixtures, and equipment and components shall not be mounted on or penetrate through walls intended to break away under flood loads.

  Exception: Locating electrical systems, equipment and components; heating, ventilating, air-conditioning; plumbing appliances and plumbing fixtures; duct systems; and other service equipment is permitted below the elevation required in Section R306.2 or R306.3 provided that they are designed and installed to prevent water from entering or accumulating within the components and to resist hydrostatic and hydrodynamic loads and stresses, including the effects of buoyancy, during the occurrence of flooding to the required elevation in accordance with ASCE 24. Electrical wiring systems are permitted to be located below the required elevation provided that they conform to the provisions of the California Electrical Code for wet locations.

  R306.1.7 Protection of water supply and sanitary sewage systems. Water supply systems shall be designed to minimize or elim- inate infiltration of floodwaters into the water supply and distribution systems. Sanitary sewage systems shall be designed to minimize or eliminate infiltration of floodwaters into sanitary drainage systems and discharges from sanitary drainage systems into floodwaters.

  R306.1.8 Flood-resistant materials. Building materials and installation methods used for flooring and interior and exterior walls and wall coverings below the elevation required in Section R306.2 or R306.3 shall be flood damage-resistant materials that conform to the provisions of FEMA TB-2.

  R306.1.9 Manufactured homes. (Not adopted in CA)

  R306.1.10 As-built elevation documentation. A registered design professional shall prepare and seal documentation of the elevations specified in Section R306.2 or R306.3.

• CRC § 2.5 Medium relevance — show source text

  405 A .2.5 Substantial structural damage to snow load-carrying components. Where substantial structural damage to any snow load-carrying components is caused by or related to snow load effects, any components required to carry snow loads on roof framing of similar construction shall be repaired, replaced or retrofitted to satisfy the requirements of Section 1608 of the California Building Code .

  405 A .2.6 Flood hazard areas. In flood hazard areas, buildings that have sustained substantial damage shall be brought into compliance with Section 1612 A of the California Building Code .

  SECTION 406 A —ELECTRICAL

  406 A .1 General. Existing electrical wiring and equipment undergoing repair shall be in accordance with Title 24 Part 3 California Electri- cal Code (CEC).

  406 A .1.1 Reconditioned electrical equipment. Reconditioned electrical equipment shall comply with the California Electrical Code . Electrical equipment prohibited from being reconditioned by the applicable sections of the California Electrical Code shall not be reconditioned unless permitted by NFPA 99.

  406 A .1.2 Health care facilities. Portions of electrical systems being repaired in Group I-2, ambulatory care facilities and outpatient clinics shall comply with NFPA 99 requirements for repairs.

  SECTION 407 A —MECHANICAL

  407 A .1 General. Existing mechanical systems undergoing repair shall not make the building less complying than it was before the damaged occurred.

  4A-4 2025 CALIFORNIA EXISTING BUILDING CODE

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  REPAIRS

  SECTION 408 A —PLUMBING

  408 A .1 Materials. Plumbing materials and supplies shall not be used for repairs that are prohibited in the Title 24 Part 5 California Plumbing Code (CPC).

  408 A .2 Water closet replacement. The maximum water consumption flow rates and quantities for all replaced water closets shall be 1.28 gallons ( 4.8 L) per flushing cycle.

  408 A .3 Health care facilities. Portions of medical gas systems being repaired in Group I-2, ambulatory care facilities and outpatient clinics shall comply with NFPA 99 requirements for repairs.

  2025 CALIFORNIA EXISTING BUILDING CODE 4A-5

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  4A-6 2025 CALIFORNIA EXISTING BUILDING CODE

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  CALIFORNIA EXISTING BUILDING CODE – MATRIX ADOPTION TABLE

  CHAPTER 5 – PRESCRIPTIVE COMPLIANCE METHOD

  (Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

• CRC § 10.22 Medium relevance — show source text

  [10.22] American Petroleum Institute (API), 2005, API Standard 2610 (R2010), “Design, Construction, Operation, Maintenance, and Inspection of Terminal and Tank Facilities,” 2nd ed., Washington, D.C.

  Authority: Sections 8750 through 8760, Public Resources Code.

  Reference: Sections 8750, 8751, 8755 and 8757, Public Resources Code.

  2025 CALIFORNIA BUILDING CODE 31F-89

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  MARINE OIL TERMINALS

  Division 11

  SECTION 3111F — ELECTRICAL SYSTEMS

  3111F.1 General. This section provides minimum standards for electrical systems at marine oil terminals.

  Electrical systems include the incoming electrical service and components, the electrical distribution system, branch circuit cables and the connections, including, but not limited to: 1. Lighting, for operations, security and navigation 2. Controls for mechanical and electrical equipment 3. Supervision and instrumentation systems for mechanical and electrical equipment 4. Grounding and bonding 5. Corrosion protection through cathodic protection 6. Communications and data handling systems 7. Fire detection systems 8. Fire alarm systems 9. Emergency shutdown systems (ESD)

  All electrical systems shall conform to API RP 540 [11.1] and the California Electrical Code [11.2].

  See Section 3101F.3 for definitions of “new” (N) and “existing” (E).

  3111F.2 Hazardous area designations and plans (N/E). Area classifications shall be determined in accordance with API RP 500 [11.3], API RP 540 [11.1] and Articles 500, 501, 504, 505 and 515 of the California Electrical Code [11.2]. A marine oil terminal shall have a current set of scaled plan drawings, with clearly designated areas showing the hazard class, division and group. The plan view shall be supple- mented with sections, elevations and details to clearly delineate the area classification at all elevations starting from low water level. The drawings shall be certified by a professional electrical engineer. The plans shall be reviewed and revised when modifications to the structure, product or equipment change hazardous area identifications or boundaries.

  3111F.3 Identification and tagging. All electrical equipment, cables and conductors shall be clearly identified by means of tags, plates, color coding or other effective means to facilitate troubleshooting and improve safety, and shall conform to the identification carried out for the adjacent on-shore facilities (N). Topics for such identification are found in Articles 110, 200, 210, 230, 384, 480 and 504 of the Cali- fornia Electrical Code [11.2]. Existing electrical equipment (E) shall be tagged.

  Where identification is necessary for the proper and safe operation of the equipment, the marking shall be clearly visible and illumi- nated (N/E). A coded identification system shall apply to all circuits, carrying low or high voltage power, control, supervisory or communication (N).

• CRC § 2.5. Medium relevance — show source text

  Exception: Bracing above the roofline shall not be required where the maximum height of unbraced unreinforced masonry does not exceed a height-to-width ratio of 2.5. Height shall be measured from the top of the parapet down to the highest existing brace or anchor point attached to the structure.

  BO105.5 Electrical equipment and wiring. Electrical equipment and wiring shall comply with this section.

  BO105.5.1 Materials and methods. Newly installed electrical equipment and wiring relating to work done in any work area, including in newly installed partitions and ceilings, shall comply with the materials and methods requirements of Chapters 34 through 43.

  BO105.5.2 Electrical service. Service to the dwelling unit shall be not less than 100 ampere, three-wire capacity, and service equipment shall be dead front having no live parts exposed that could allow accidental contact. Type “S” fuses shall be installed where fused equipment is used.

  Exception: Existing service of 60 ampere, three-wire capacity, and feeders of 30 ampere or larger two- or three-wire capacity shall be accepted if adequate for the electrical load being served.

  BO105.5.3 Additional electrical requirements. Where the work area includes any of the following areas within a dwelling unit, the requirements of Sections BO105.5.3.1 through BO105.5.3.5 shall apply.

  BO105.5.3.1 Enclosed areas. Enclosed areas other than closets, kitchens, basements, garages, hallways, laundry areas and bathrooms shall have not fewer than two duplex receptacle outlets, or one duplex receptacle outlet and one ceiling- or walltype lighting outlet.

  BO105.5.3.2 Kitchen and laundry areas. Kitchen areas shall have not fewer than two duplex receptacle outlets. Laundry areas shall have not fewer than one duplex receptacle outlet located near the laundry equipment and installed on an independent branch circuit.

  BO105.5.3.3 Ground-fault circuit interruption. Ground-fault circuit interruption shall be provided on newly installed receptacle outlets if required by Chapters 34 through 43.

  BO105.5.3.4 Lighting outlets. Not less than one lighting outlet controlled by a listed wall-mounted device shall be provided in every bathroom, hallway, stairway, attached garage and detached garage with electric power to illuminate outdoor entrances and exits, and in utility rooms and basements where these spaces are used for storage or contain equipment requiring service. The wall-mounted control device shall be located near an entrance to the room.

  BO105.5.3.5 Clearance. Clearance for electrical service equipment shall be provided in accordance with Chapters 34 through 43.

  BO105.6 Ventilation. Reconfigured spaces intended for occupancy and spaces converted to habitable or occupiable space in any work area shall be provided with ventilation in accordance with Section R325.

  BO105.7 Ceiling height. Where a habitable attic or habitable space is created in an existing building, ceiling heights shall be not less than 6 feet 8 inches (2032 mm). Bathrooms, toilet rooms and laundry rooms shall have a ceiling height of not less than 6 feet 4 inches (1930 mm).

• CRC § 10.16 Medium relevance — show source text

  [10.16] American Society of Mechanical Engineers (ASME) 1999, ASME HST-1999 (R2010) (ASME HST-4), “Performance Standard for Overhead Electric Wire Rope Hoists,” New York.

  [10.17] Code of Federal Regulations (CFR), Title 29, Section 1917.46 – Load Indicating Devices (29 CFR 1917.46)

  [10.18] Code of Federal Regulations (CFR), Title 29, Section 1918.22 – Gangways (29 CFR 1918.22)

  [10.19] US Army Corps of Engineers (USACE), 2008 (05 Jul 11), EM 385-1-1, “Safety and Health Requirements Manual, Sections 19.B and 21.E, Washington, D.C.

  [10.20] International Chamber of Shipping (ICS), Oil Companies International Marine Forum (OCIMF), International Association of Ports and Harbors (IAPH), 2010, “International Safety Guide for Oil Tankers and Terminals (ISGOTT),” 5th ed., Witherby, London.

  [10.21] Code of Federal Regulations (CFR), Title 33, Sections 154.2000 through 154.2250 – Vapor Control Systems (33 CFR 154.2000 et. seq.)

  [10.22] American Petroleum Institute (API), 2005, API Standard 2610 (R2010), “Design, Construction, Operation, Maintenance, and Inspection of Terminal and Tank Facilities,” 2nd ed., Washington, D.C.

  Authority: Sections 8750 through 8760, Public Resources Code.

  Reference: Sections 8750, 8751, 8755 and 8757, Public Resources Code.

  2025 CALIFORNIA BUILDING CODE 31F-89

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  MARINE OIL TERMINALS

  Division 11

  SECTION 3111F — ELECTRICAL SYSTEMS

  3111F.1 General. This section provides minimum standards for electrical systems at marine oil terminals.

  Electrical systems include the incoming electrical service and components, the electrical distribution system, branch circuit cables and the connections, including, but not limited to: 1. Lighting, for operations, security and navigation 2. Controls for mechanical and electrical equipment 3. Supervision and instrumentation systems for mechanical and electrical equipment 4. Grounding and bonding 5. Corrosion protection through cathodic protection 6. Communications and data handling systems 7. Fire detection systems 8. Fire alarm systems 9. Emergency shutdown systems (ESD)

  All electrical systems shall conform to API RP 540 [11.1] and the California Electrical Code [11.2].

  See Section 3101F.3 for definitions of “new” (N) and “existing” (E).

• CRC § 4.2.2 Medium relevance — show source text

  These exceptions shall not be applied simultaneously.

  BO105.4.2.2 Live load increase. An increase in live load shall be determined based on Table R301.5.

  BO105.4.2.3 Snow load increase. Snow load shall be considered to be increased for purposes of this section when alteration of the roof configuration creates new areas that accumulate drifted snow.

  BO105.4.2.4 Wind load increase. Wind load shall be considered to be increased for purposes of this section when the exposed surface area of any exterior elevation subject to wind pressure is increased by more than 5 percent.

  APPENDIX BO-4 2025 CALIFORNIA RESIDENTIAL CODE

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  APPENDIX BO — EXISTING BUILDINGS AND STRUCTURES

  BO105.4.2.5 Seismic load increase. Seismic load shall be considered to be increased for purposes of this section in existing buildings assigned to Seismic Design Category C, D 0, D 1 or D 2 where new materials replace lighter-weight materials in one of the following conditions:

  1. Concrete tile or tile roof covering of similar weight is installed on more than 50 percent of the total roof area.
  2. Brick veneer or cladding of similar weight is installed on walls above the second story.

  BO105.4.3 Unreinforced masonry parapets. Unreinforced masonry parapets located in Seismic Design Category D2 shall have wall anchors installed at the roofline and additional bracing installed above the roofline whenever a reroofing permit is issued and work involves removal of roofing materials from more than 25 percent of the roof area. Such masonry bracing and wall anchors shall be of an approved design, unless an evaluation demonstrates compliance of the existing bracing and anchorage.

  Exception: Bracing above the roofline shall not be required where the maximum height of unbraced unreinforced masonry does not exceed a height-to-width ratio of 2.5. Height shall be measured from the top of the parapet down to the highest existing brace or anchor point attached to the structure.

  BO105.5 Electrical equipment and wiring. Electrical equipment and wiring shall comply with this section.

  BO105.5.1 Materials and methods. Newly installed electrical equipment and wiring relating to work done in any work area, including in newly installed partitions and ceilings, shall comply with the materials and methods requirements of Chapters 34 through 43.

  BO105.5.2 Electrical service. Service to the dwelling unit shall be not less than 100 ampere, three-wire capacity, and service equipment shall be dead front having no live parts exposed that could allow accidental contact. Type “S” fuses shall be installed where fused equipment is used.

  Exception: Existing service of 60 ampere, three-wire capacity, and feeders of 30 ampere or larger two- or three-wire capacity shall be accepted if adequate for the electrical load being served.

  BO105.5.3 Additional electrical requirements. Where the work area includes any of the following areas within a dwelling unit, the requirements of Sections BO105.5.3.1 through BO105.5.3.5 shall apply.

• CRC § 24-1 Medium relevance — show source text

  (Note: Part VI is not adopted. See California Mechanical Code and California Plumbing Code, Title 24, Parts 4 and 5.)

  2025 CALIFORNIA RESIDENTIAL CODE 24-1

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  24-2 2025 CALIFORNIA RESIDENTIAL CODE

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  Part VII—Plumbing

  (Note: Part VII is not adopted. See California Plumbing Code, Title 24, Part 5.)

  2025 CALIFORNIA RESIDENTIAL CODE 25-1

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  25-2 2025 CALIFORNIA RESIDENTIAL CODE

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  Part VIII—Electrical

  (Note: Part VIII is not adopted. See California Electrical Code, Title 24, Part 3.)

  2025 CALIFORNIA RESIDENTIAL CODE 34-1

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  34-2 2025 CALIFORNIA RESIDENTIAL CODE

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE

  CHAPTER 44 – REFERENCED STANDARDS

  (Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

  Adopting agency	BSC	BSC- CG	SFM	HCD	Col6	Col7	DSA	Col9	Col10	OSHPD	Col12	Col13	Col14	Col15	Col16	BSCC	DPH	AGR	DWR	CEC	CA	SL	SLC
  Adopting agency	BSC	BSC- CG	SFM	1	2	1/AC	AC	SS	SS/CC	1	1R	2	3	4	5	5	5	5	5	5	5	5	5
  Adopt entire chapter
  Adopt entire chapter as amended (amended sections listed below)			X	X
  Adopt only those sections that are listed below
  Chapter / Section
  AAMA				X
  ACCA				X
  ANSI			X	X
  ASME				X
  ASTM			X	X
  ASTM

• CRC § G115 Medium relevance — show source text

  G114.4 Enclosures below design flood elevation. Fully enclosed areas below the design flood elevation shall be constructed in accordance with ASCE 24.

  G114.5 Flood-damage-resistant materials. Flood-damage-resistant materials shall be used below the design flood elevation.

  G114.6 Protection of mechanical, plumbing and electrical systems. Mechanical, plumbing and electrical systems, including plumbing fixtures, shall be elevated to or above the design flood elevation.

  Exception: Electrical systems, equipment and components; heating, ventilating, air conditioning and plumbing appliances; plumbing fixtures, duct systems and other service equipment shall be permitted to be located below the design flood elevation provided that they are designed and installed to prevent water from entering or accumulating within the components and to

  2025 CALIFORNIA BUILDING CODE APPENDIX G-7

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  APPENDIX G—FLOOD-RESISTANT CONSTRUCTION

  resist hydrostatic and hydrodynamic loads and stresses, including the effects of buoyancy, during the occurrence of flooding to the design flood elevation in compliance with the flood-resistant construction requirements of this code. Electrical wiring systems shall be permitted to be located below the design flood elevation provided that they conform to the provisions of the California Electrical Code.

  SECTION G115—REFERENCED STANDARDS

  G115.1 General. See Table G115.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard identification with the effective date, standard title, and the section or sections of this appendix referenced in the standard.

  TABLE G115.1—REFERENCED STANDARDS	Col2	Col3
  STANDARD ACRONYM	STANDARD NAME	SECTIONS HEREIN REFERENCED
  ASCE 24—14	Flood Resistant Design and Construction	G104.1, G108.3, G108.4, G111.1, G112.1, G112.5, G112.6, G112.7, G113.1, G114.4
  HUD 24 CFR Part 3285 (2008)	Manufactured Home Construction and Safety Standards	G102
  CBC_—25_	California Building Code	G103.2, G114.1, G114.3
  CRC_—25_	California Residential Code	G109.2, G109.4, G109.5
  CEC_—25_	California Electrical Code	G109.4, G114.6

  APPENDIX G-8 2025 CALIFORNIA BUILDING CODE

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  CALIFORNIA BUILDING CODE – MATRIX ADOPTION TABLE

  APPENDIX H – SIGNS

  (Not adopted by state agencies)

• CRC § 2025 Medium relevance — show source text

  It is important to understand that the IRC contains coverage for what is conventional and common in residential construction practice. While the IRC will provide all of the needed coverage for most residential construction, it might not address construction practices and systems that are atypical or rarely encountered in the industry. Therefore, the IRC contains several references to other codes either as an alternative to the provisions of the IRC or where the IRC lacks coverage for a particular type of structure, design, system, appliance or method of construction. In other words, the IRC is meant to be all inclusive for typical residential construction and it relies on other codes only where alternatives are desired or where the code lacks coverage for the uncommon aspect of residential construction. Of course, the IRC constantly evolves to address new technologies and construction practices that were once uncommon, but are now common.

  The IRC is unique in that much of it, including Chapters 3 through 9 and Chapters 34 through 43, is presented in an ordered format that is consistent with the normal progression of construction, starting with the design phase and continuing through the final trimout phase. This is consistent with the “cookbook” philosophy of the IRC.

  2025 CALIFORNIA RESIDENTIAL CODE xiii

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  xiv 2025 CALIFORNIA RESIDENTIAL CODE

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  Arrangement and Format of the 2025 CRC

  The CRC is divided into nine main parts, specifically: Part I—Administrative, Part II—Definitions, Part III—Building Planning and Construction, Part IV—Energy Conservation, Part V—Mechanical, Part VI—Fuel Gas, Part VII—Plumbing, Part VIII—Electrical and Part IX—Referenced Standards. Parts IV through VIII of IRC are not adopted in California and replaced with references to appropriate parts of Title 24. The following provides a brief description of the content of each chapter and appendix of the CRC:

  Chapter 1 Scope and Administration.

  Chapter 1 establishes the limits of applicability of the code and describes how the code is to be applied and enforced. The provisions of Chapter 1 establish the authority and duties of the code official appointed by the authority having jurisdiction and also establish the rights and privileges of the design professional, contractor and property owner.

  Chapter 2 Definitions.

  Chapter 2 is the repository of the definitions of terms used in the body of the code. The user of the code should be familiar with and consult this chapter because the definitions are essential to the correct interpretation of the code and because the user may not be aware that a term is defined.

  Chapter 3 Building Planning.

  Chapter 3 provides guidelines for a minimum level of structural integrity, life safety, fire safety and livability for inhabitants of dwelling units regulated by this code. Chapter 3 is a compilation of the code requirements specific to the building planning sector of the design and construction process. This chapter sets forth code requirements dealing with light, ventilation, sanitation, minimum room size, ceiling height and environmental comfort. Chapter 3 establishes life-safety provisions including limitations on glazing used in hazardous areas, specifications on stairways, use of guards at elevated surfaces, window and fall protection, and rules for means of egress. Snow, wind and seismic design live and dead loads and flood-resistant construction, as well as solar energy systems are addressed in this chapter.

  Chapter 4 Foundations.

• CRC § 10-13 Medium relevance — show source text

  R1006.5 Outlet. The exterior air outlet shall be located in the back or side of the firebox chamber or shall be located outside of the firebox, at the level of the hearth and not greater than 24 inches (610 mm) from the firebox opening. The outlet shall be closable and designed to prevent burning material from dropping into concealed combustible spaces.

  2025 CALIFORNIA RESIDENTIAL CODE 10-13

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  10-14 2025 CALIFORNIA RESIDENTIAL CODE

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  Part IV—Energy Conservation

  (Note: Part IV is not adopted. See California Energy Code, Title 24, Part 6.)

  2025 CALIFORNIA RESIDENTIAL CODE 11-1

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  11-2 2025 CALIFORNIA RESIDENTIAL CODE

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  Part V—Mechanical

  (Note: Part V is not adopted. See California Mechanical Code, Title 24, Part 4.)

  2025 CALIFORNIA RESIDENTIAL CODE 12-1

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  12-2 2025 CALIFORNIA RESIDENTIAL CODE

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  Part VI—Fuel Gas

  (Note: Part VI is not adopted. See California Mechanical Code and California Plumbing Code, Title 24, Parts 4 and 5.)

  2025 CALIFORNIA RESIDENTIAL CODE 24-1

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  24-2 2025 CALIFORNIA RESIDENTIAL CODE

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  Part VII—Plumbing

  (Note: Part VII is not adopted. See California Plumbing Code, Title 24, Part 5.)

  2025 CALIFORNIA RESIDENTIAL CODE 25-1

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  25-2 2025 CALIFORNIA RESIDENTIAL CODE

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  Part VIII—Electrical

  (Note: Part VIII is not adopted. See California Electrical Code, Title 24, Part 3.)

  2025 CALIFORNIA RESIDENTIAL CODE 34-1

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  34-2 2025 CALIFORNIA RESIDENTIAL CODE

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE

  CHAPTER 44 – REFERENCED STANDARDS

  (Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

  |Adopting

• CRC § 130.5 Medium relevance — show source text

  (a) Service electrical metering. Each electrical service or feeder shall have a permanently installed metering system which measures electrical energy use in accordance with Table 130.5-A.

  Exception 1 to Section 130.5(a): Service or feeder for which the utility company provides a metering system that indicates instantaneous kW demand and kWh for a utility-defined period.

  Exception 2 to Section 130.5(a): Electrical power distribution systems subject to California Electrical Code Article 517.

  TABLE 130.5-A—MINIMUM REQUIREMENTS FOR METERING OF ELECTRICAL LOAD	Col2	Col3	Col4	Col5
  METERING FUNCTIONALITY	ELECTRICAL SERVICES RATED 50 kVA OR LESS	ELECTRICAL SERVICES RATED MORE THAN 50 kVA AND LESS THAN OR EQUAL TO 250 kVA	ELECTRICAL SERVICES RATED MORE THAN 250 kVA AND LESS THAN OR EQUAL TO 1000 kVA	ELECTRICAL SERVICES RATED MORE THAN 1000 kVA
  Instantaneous (at the time) kW demand	Required	Required	Required	Required
  Historical peak demand (kW)	Not required	Not required	Required	Required
  Tracking kWh for a user-definable period	Required	Required	Required	Required
  kWh per rate period	Not required	Not required	Not required	Required

  (b) Separation of electrical circuits for electrical energy monitoring. Electrical power distribution systems shall be designed so that measurement devices can monitor the electrical energy usage of load types according to Table 130.5-B.

  Exception 1 to Section 130.5(b): For each separate load type, up to 10 percent of the connected load may be of any type.

  Exception 2 to Section 130.5(b): Electrical power distribution systems subject to California Electrical Code Article 517.

  TABLE 130.5-B—MINIMUM REQUIREMENTS FOR SEPARATION OF ELECTRICAL LOAD	Col2	Col3	Col4	Col5
  ELECTRICAL LOAD TYPE	ELECTRICAL SERVICES RATED 50 kVA OR LESS	ELECTRICAL SERVICES RATED MORE THAN 50 kVA AND LESS THAN OR EQUAL TO 250 kVA	ELECTRICAL SERVICES RATED MORE THAN 250 kVA AND LESS THAN OR EQUAL TO 1000 kVA	ELECTRICAL SERVICES RATED MORE THAN 1000 kVA
  Lighting including exit and egress lighting and exterior lighting	Not required	All lighting in aggregate	All lighting disaggregated by floor, type or area	All lighting disaggregated by floor, type or area
  HVAC systems and components including chillers, fans, heaters, furnaces, package units,