Association News

NEMA publishes guidance for panelboards and switchboards.

Press Release Summary:

Apr 07, 2008 - NEMA has published ANSI/NEMA PB 1.1-2007 General Instructions for Proper Installation, Operation, and Maintenance of Panelboards Rated 600 Volts or Less. It also released ANSI/NEMA PB 2.1-2007 General Instructions for Proper Handling, Installation, Operation, and Maintenance of Deadfront Distribution Switchboards Rated 600 Volts or Less, which provides the same guidance for switchboards. Both were developed by the Panelboard and Distribution Board Product Group of the LVDE Section.

National Electrical Manufacturers Association (NEMA) - Rosslyn, VA

Original Press Release

NEMA Publishes ANSI/NEMA PB 1.1-2007 and ANSI/NEMA PB 2.1-2007

Press release date: Mar 21, 2008

ROSSLYN, Va., March 21, 2008 - The National Electrical Manufacturers Association (NEMA) has published ANSI/NEMA PB 1.1-2007 General Instructions for Proper Installation, Operation, and Maintenance of Panelboards Rated 600 Volts or Less, and ANSI/NEMA PB 2.1-2007 General Instructions for Proper Handling, Installation, Operation, and Maintenance of Deadfront Distribution Switchboards Rated 600 Volts or Less. Both were developed by the Panelboard and Distribution Board Product Group of the LVDE Section.

PB 1.1-2007 is a guide to the best practices for the handling, storage, installation, operation, and maintenance of panelboards. It covers single panelboards or groups of panel units suitable for assembly in the form of single panelboards, including buses, and with or without switches or automatic overload protective devices (fuses or circuit breakers), or both. These units are used in the distribution of electricity at 600 volts and less with 1600-ampere mains or less, and 1200-ampere branch circuits or less. Specifically excluded are live-front panelboards, panelboards employing cast enclosures for special service conditions, and panelboards designed primarily for residential and light commercial service equipment.

PB 2.1-2007 provides the same guidance for deadfront distribution switchboards, and covers floor-mounted deadfront switchboards that consist of an enclosure; molded case and low-voltage power circuit breakers; fusible or non-fusible switches; instruments; and metering, monitoring, or control equipment, with associated interconnections and supporting structures. These units are used in the distribution of electricity at 600 volts and less, and 6000 amperes or less.

These standards do not claim to cover all details or variations in equipment, nor do they provide for every possible contingency regarding installation, operation, or maintenance. The work described in these documents should be performed only by qualified personnel familiar with the construction and operation of panelboards.

An electronic copy of ANSI/NEMA PB 1.1-2007 may be downloaded at no charge or a hard copy may be purchased for $32, by visiting NEMA's Web site at www.nema.org/stds/pb1-1.cfm. An electronic copy of ANSI/NEMA PB 2.1-2007 may be downloaded at no charge or a hard copy may be purchased for $32 at www.nema.org/stds/pb2-1.cfm. These standards may also be purchased by contacting IHS at 800-854-7179 (within the U.S.), 303-397-7956 (international), 303-397-2740 (fax), or on the Web at global.ihs.com.

The contents and scope of PB 2.1-2007 may be viewed, and a hard copy or electronic copy purchased for $32, by visiting NEMA's Web site at www.nema.org/stds/pb2-1.cfm, or by contacting IHS at 800-854-7179 (within the U.S.), 303-397-7956 (international), 303-397-2740 (fax), or on the Web at global.ihs.com.

NEMA is the trade association of choice for the electrical manufacturing industry. Founded in 1926 and headquartered near Washington, D.C., its approximately 450 member companies manufacture products used in the generation, transmission and distribution, control, and end-use of electricity. These products are used in utility, medical imaging, industrial, commercial, institutional, and residential applications. Domestic production of electrical products sold worldwide exceeds $120 billion. In addition to its headquarters in Rosslyn, Virginia, NEMA also has offices in Beijing, Sao Paulo, and Mexico City.

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