Chapter 4

Fixed Outdoor Electric Deicing and Snow- Melting Equipment Part I. General Scope. The requirements of this article shall apply to electrically energized heating systems and the installation of these systems. Embedded. Embedded in driveways, walks, steps, and other areas. Exposed. Exposed on drainage systems, bridge structures, roofs, and other structures. Informational Note: For further information, see ANSI/IEEE515.1-2012, Standard for… read more »

Fixed Resistance and Electrode Industrial Process Heating Equipment The equipment shall be considered a continuous duty load. Part I. General Scope. This article covers fixed industrial process heat‐ ing employing electric resistance or electrode heating technol‐ ogy. For the purpose of this article, heating equipment shall include boilers, electrode boilers, duct heaters, strip heaters, immersion heaters,… read more »

Fixed Electric Space-Heating Equipment Part I. General Scope. This article covers fixed electric equipment used for space heating. For the purpose of this article, heating equipment shall include heating cable, unit heaters, boilers, central systems, or other approved fixed electric space-heating equipment. This article shall not apply to process heating and room air conditioning. Other Articles. Fixed… read more »

Appliances Part I. General 422.1 Scope. This article covers electrical appliances used in any occupancy. • Other Articles. The requirements of Article 430 shallapply to the installation of motor-operated appliances, and the requirements of Article 440 shall apply to the installation of appliances containing a hermetic refrigerant motor- compressor(s), except as specifically amended in this article. Live… read more »

Low-Voltage Lighting Informational Note: Refer to Article 680 for applications involving immersion. 411.1 Scope. This article covers lighting systems and their associated components operating at no more than 30 volts ac or 60 volts dc. Where wet contact is likely to occur, the limits are 15 volts ac or 30 volts dc. Low-Voltage LightingInformational Note: Refer to Article 680 for applications involv‐ing immersion.411.1 Scope. This… read more »

Luminaires, Lampholders, and Lamps Part I. General Scope. This article covers luminaires, portable lumin‐ aires, lampholders, pendants, incandescent filament lamps, arc lamps, electric-discharge lamps, decorative lighting products, lighting accessories for temporary seasonal and holiday use, portable flexible lighting products, and the wiring and equip‐ ment forming part of such products and lighting installations. Definition. Closet Storage… read more »

Industrial Control Panels Part I. General 409.1 Scope. This article covers industrial control panels intended for general use and operating at 1000 volts or less. Informational Note: ANSI/UL 508A, Standard for Industrial Control Panels, is a safety standard for industrial control panels. 409.3 Other Articles. In addition to the requirements of Arti‐ cle 409, industrial control panels that… read more »

Switchboards, Switchgear, and Panelboards Part I. General Scope. This article covers switchboards, switchgear, and panelboards. It does not apply to equipment operating at over 1000 volts, except as specifically referenced elsewhere in the Code. Other Articles. Switches, circuit breakers, and overcur‐ rent devices used on switchboards, switchgear, and panelboards and their enclosures shall comply with this article and… read more »

Receptacles, Cord Connectors, and Attachment Plugs (Caps) For receptacles controlled by an automatic control device, the marking shall be located on the receptacle face and visible after installation. Scope. This article covers the rating, type, and installa‐ tion of receptacles, cord connectors, and attachment plugs (cord caps). Definitions.Child Care Facility. A building or structure, or portion thereof, for educational,… read more »

Switches Part I. Installation Scope. The provisions of this article apply to all switches, switching devices, and circuit breakers used as switches operating at 1000 volts and below, unless specifically referenced elsewhere in this Code for higher voltages. Switch Connections. Three-Way and Four-Way Switches. Three-way and four- way switches shall be wired so that all switching is done only… read more »