Copyright

Preface

Effective Use of the International Residential Code

Legislation

Chapter 1 Scope and Administration

Chapter 2 Definitions

Chapter 3 Building Planning

Chapter 4 Foundations

Chapter 5 Floors

Chapter 6 Wall Construction

Chapter 7 Wall Covering

Chapter 8 Roof-Ceiling Construction

Chapter 9 Roof Assemblies

Chapter 10 Chimneys and Fireplaces

Chapter 11 [Re] Energy Efficiency

Chapter 12 Mechanical Administration

Chapter 13 General Mechanical System Requirements

Chapter 14 Heating and Cooling Equipment and Appliances

Chapter 15 Exhaust Systems

Chapter 16 Duct Systems

Chapter 17 Combustion Air

Chapter 18 Chimneys and Vents

Chapter 19 Special Appliances, Equipment and Systems

Chapter 20 Boilers and Water Heaters

Chapter 21 Hydronic Piping

Chapter 22 Special Piping and Storage Systems

Chapter 23 Solar Thermal Energy Systems

Chapter 24 Fuel Gas

Chapter 25 Plumbing Administration

Chapter 26 General Plumbing Requirements

Chapter 27 Plumbing Fixtures

Chapter 28 Water Heaters

Chapter 29 Water Supply and Distribution

Chapter 30 Sanitary Drainage

Chapter 31 Vents

Chapter 32 Traps

Chapter 33 Storm Drainage

Chapter 34 General Requirements

Chapter 35 Electrical Definitions

Chapter 36 Services

Chapter 37 Branch Circuit and Feeder Requirements

Chapter 38 Wiring Methods

Chapter 39 Power and Lighting Distribution

Chapter 40 Devices and Luminaires

Chapter 41 Appliance Installation

Chapter 42 Swimming Pools

Chapter 43 Class 2 Remote-Control, Signaling and Power-Limited Circuits

Chapter 44 Referenced Standards

Appendix A Sizing and Capacities of Gas Piping

Appendix B Sizing of Venting Systems Serving Appliances Equipped With Draft Hoods, Category I Appliances, and Appliances Listed for Use With Type B Vents

Appendix C Exit Terminals of Mechanical Draft and Direct-Vent Venting Systems

Appendix D Recommended Procedure for Safety Inspection of an Existing Appliance Installation

Appendix E Manufactured Housing Used as Dwellings

Appendix F Passive Radon Gas Controls

Appendix G Piping Standards for Various Applications

Appendix H Patio Covers

Appendix I Private Sewage Disposal

Appendix J Existing Buildings and Structures

Appendix K Sound Transmission

Appendix L Permit Fees

Appendix M HOME DAY CARE—R-3 OCCUPANCY

Appendix N Venting Methods

Appendix O Automatic Vehicular Gates

Appendix P Sizing of Water Piping System

Appendix Q Reserved

Appendix R Light Straw-Clay Construction

Appendix S Strawbale Construction

Appendix T Recommended Procedure for Worst-Case Testing of Atmospheric Venting Systems Under N1102.4 or N1105 Conditions

Appendix U SOLAR-READY PROVISIONS—DETACHED ONE- AND TWO-FAMILY DWELLINGS, MULTIPLE SINGLE- FAMILY DWELLINGS (TOWNHOUSES)

This section covers installation requirements for appliances and fixed heating equipment. (422.1 and 424.1)
Appliances and equipment shall be installed in accordance with the manufacturer's installation instructions. Electrically heated appliances and equipment shall be installed with the required clearances to combustible materials. [110.3(B) and 422.17]
Cord-and-plug-connected appliances shall use cords suitable for the environment and physical conditions likely to be encountered. Flexible cords shall be used only where the appliance is listed to be connected with a flexible cord. The cord shall be identified as suitable in the installation instructions of the appliance manufacturer. Receptacles for cord-and-plug-connected appliances shall be accessible and shall be located to avoid physical damage to the flexible cord. Except for a listed appliance marked to indicate that it is protected by a system of double-insulation, the flexible cord supplying an appliance shall terminate in a grounding-type attachment plug. A receptacle for a cord-and-plug-connected range hood shall be supplied by an individual branch circuit. Specific appliances have additional requirements as specified in Table E4101.3 (see Section E3909). [422.16(B)(1), (B)(2)]

TABLE E4101.3 FLEXIBLE CORD LENGTH

APPLIANCE MINIMUM CORD
LENGTH (inches)
MAXIMUM CORD
LENGTH (inches)
Electrically operated in-
sink waste disposal
18 36
Built-in dishwasher 36 48
Trash compactor 36 48
Range hoods 18 36

For SI: 1 inch = 25.4 mm.
Each appliance shall be protected against overcurrent in accordance with the rating of the appliance and its listing. [110.3(B), 422.11(A)]
The overcurrent protection for a branch circuit that supplies a single nonmotor-operated appliance shall not exceed that marked on the appliance. Where the overcurrent protection rating is not marked and the appliance is rated at over 13.3 amperes, the overcurrent protection shall not exceed 150 percent of the appliance rated current. Where 150 percent of the appliance rating does not correspond to a standard overcurrent device ampere rating, the next higher standard rating shall be permitted. Where the overcurrent protection rating is not marked and the appliance is rated at 13.3 amperes or less, the overcurrent protection shall not exceed 20 amperes. [422.11(E)]
Each appliance shall be provided with a means to disconnect all ungrounded supply conductors. For fixed electric space-heating equipment, means shall be provided to disconnect the heater and any motor controller(s) and supplementary overcurrent-protective devices. Switches and circuit breakers used as a disconnecting means shall be of the indicating type. Disconnecting means shall be as set forth in Table E4101.5. (422.30, 422.35, and 424.19)

TABLE E4101.5 DISCONNECTING MEANS [422.31(A), (B), and (C); 422.34; 422.35; 424.19; 424.20; and 440.14]

DESCRIPTION ALLOWED DISCONNECTING MEANS
Permanently connected appliance rated at not over 300
volt-amperes or 1/8 horsepower.
Branch-circuit overcurrent device.
Permanently connected appliances rated in excess of 300 volt-
amperes.
Branch circuit breaker or switch located within sight of appliance or
such devices in any location that are capable of being locked in the
open position. The provision for locking or adding a lock to the
disconnecting means shall be installed on or at the switch or circuit
breaker used as the disconnecting means and shall remain in place
with or without the lock installed.
Motor-operated appliances rated over 1/8 horsepower. For permanently connected motor-operated appliances with motors
rated over 1/8 horsepower, the branch circuit switch or circuit breaker
shall be permitted to serve as the disconnecting means where the
switch or circuit breaker is within sight from the appliance. Where the
branch circuit switch is not located within sight from the appliance,
the disconnecting means shall be one of the following types: a listed
motor-circuit switch rated in horsepower, a listed molded case circuit
breaker, a listed molded case switch, a listed manual motor controller
additionally marked "Suitable as Motor Disconnect" where installed
between the final motor branch-circuit short-circuit protective device
and the motor. For stationary motors rated at 2 hp or less and 300
volts or less, the disconnecting means shall be permitted to be one of
the following devices:
1. A general-use switch having an ampere rating not less than
twice the full-load current rating of the motor.
2. On AC circuits, a general-use snap switch suitable only for use
on AC, not general-use AC–DC snap switches, where the
motor full-load current rating is not more than 80 percent of
the ampere rating of the switch.
3. A listed manual motor controller having a horsepower rating
not less than the rating of the motor and marked "Suitable as
Motor Disconnect".
The disconnecting means for motor circuits rated 600 volts,
nominal, or less shall have an ampere rating not less than 115 percent of the
full-load current rating of the motor except that a listed unfused
motor-circuit switch having a horsepower rating not less than the
motor horsepower shall be permitted to have an ampere rating less
than 115 percent of the full-load current rating of the motor. The
disconnecting means shall be installed within sight of the appliance.
Exception: A unit switch with a marked-off position that is a part of
an appliance and disconnects all ungrounded conductors shall be
permitted as the disconnecting means and the switch or circuit
breaker serving as the other disconnecting means shall be permitted
to be out of sight from the appliance.
Appliances listed for cord-and-plug connection. A separable connector or attachment plug and receptacle provided
with access.


(continued)

TABLE E4101.5‒continued DISCONNECTING MEANS

DESCRIPTION ALLOWED DISCONNECTING MEANS
Permanently installed heating equipment with motors rated at not over
1/8 horsepower with supplementary overcurrent protection.
Disconnect, on the supply side of fuses, in sight from the supplementary
overcurrent device, and in sight of the heating equipment or, in
any location, if capable of being locked in the open position.
Heating equipment containing motors rated over 1/8 horsepower with
supplementary overcurrent protection.
Disconnect permitted to serve as required disconnect for both the
heating equipment and the controller where, on the supply side of
fuses, and in sight from the supplementary overcurrent devices, if the
disconnecting means is also in sight from the controller, or is capable
of being locked off and simultaneously disconnects the heater, motor
controller(s) and supplementary overcurrent protective devices from
all ungrounded conductors. The provision for locking or adding a lock
to the disconnecting means shall be installed on or at the switch or
circuit breaker used as the disconnecting means and shall remain in place
with or without the lock installed. The disconnecting means shall have
an ampere rating not less than 125 percent of the total load of the
motors and the heaters.
Heating equipment containing no motor rated over 1/8 horsepower
without supplementary overcurrent protection.
Branch-circuit switch or circuit breaker where within sight from the
heating equipment or capable of being locked off and simultaneously
disconnects the heater, motor controller(s) and supplementary
overcurrent protective devices from all ungrounded conductors. The
provision for locking or adding a lock to the disconnecting means shall be
installed on or at the switch or circuit breaker used as the disconnecting
means and shall remain in place with or without the lock installed.
The disconnecting means shall have an ampere rating not less than
125 percent of the total load of the motors and the heaters.
Heating equipment containing motors rated over 1/8 horsepower with-
out supplementary overcurrent protection.
Disconnecting means in sight from motor controller or as provided for
heating equipment with motor rated over 1/8 horsepower with supplementary
overcurrent protection and simultaneously disconnects the
heater, motor controller(s) and supplementary overcurrent protective
devices from all ungrounded conductors. The provision for locking or
adding a lock to the disconnecting means shall be installed on or at the
switch or circuit breaker used as the disconnecting means and shall
remain in place with or without the lock installed. The disconnecting
means shall have an ampere rating not less than 125 percent of the
total load of the motors and the heaters.
Air-conditioning condensing units and heat pump units. A readily accessible disconnect within sight from unit as the only
allowable means.a
Appliances and fixed heating equipment with unit switches having a
marked OFF position.
Unit switch where an additional individual switch or circuit breaker
serves as a redundant disconnecting means.
Thermostatically controlled fixed heating equipment. Thermostats with a marked OFF position that directly open all
ungrounded conductors, which when manually placed in the OFF
position are designed so that the circuit cannot be energized
automatically and that are located within sight of the equipment controlled.

For SI: 1 horsepower = 0.746 kW.
a. The disconnecting means shall be permitted to be installed on or within the unit. It shall not be located on panels designed to allow access to the unit or located so as to obscure the air-conditioning equipment nameplate(s).
Ceiling-suspended fans (paddle) shall be supported independently of an outlet box or by a listed outlet box or outlet box system identified for the use and installed in accordance with Section E3905.8. (422.18)
Outdoor receptacles that are not readily accessible and are supplied from a dedicated branch circuit for electric snow-melting or deicing equipment shall be permitted to be installed without ground-fault circuit-interrupter protection for personnel. However, ground-fault protection of equipment shall be provided for fixed outdoor electric deicing and snow-melting equipment. [210.8(A)(3) Exception, 426.28]
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