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UL 891

UL Standard for Safety Switchboards

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Organization: UL
Publication Date: 19 July 2019
Status: active
Page Count: 180
scope:

Scope and object

This Standard applies to switchboards nominally rated at 1 000 V or less and intended for use in accordance with the Canadian Electrical Code, Part I (CE Code, Part I), the National Electrical Code (NEC), ANSI/NFPA 70, and the Mexican Standard for Electrical Installations (Utility), NOM-001-SEDE.

In this standard the term switchboard is intended to refer to a dead-front switchboard.

These requirements do not cover the following switchboard types: preset and dimmer control (theater), live front, railway control or electrification; or constructions intended only for receiving motor control center units.

These requirements cover switchboards for use on circuits having available short-circuit currents of not more than 200 000 A.

These requirements do not cover switchboards with short-time current ratings.

Document History

UL 891
July 19, 2019
UL Standard for Safety Switchboards
Scope and object This Standard applies to switchboards nominally rated at 1 000 V or less and intended for use in accordance with the Canadian Electrical Code, Part I (CE Code, Part I), the National...
UL 891
July 26, 2005
UL Standard for Safety Switchboards
Scope and object This Standard applies to switchboards nominally rated at 600 V or less and intended for use in accordance with the Canadian Electrical Code, Part 1 (CE Code, Part 1), the National...
UL 891
July 26, 2005
UL Standard for Safety Switchboards
Scope and object This Standard applies to switchboards nominally rated at 600 V or less and intended for use in accordance with the Canadian Electrical Code, Part 1 (CE Code, Part 1), the National...
UL 891
December 23, 1998
UL Standard for Safety Dead-Front Switchboards
These requirements cover dead-front switchboard sections, interiors, and enclosures, rated 600 volts maximum, and intended to be employed as dead-front switchboards in accordance with the National...
891
December 23, 1998
UL Standard for Safety Dead-Front Switchboards
These requirements cover dead-front switchboard sections, interiors, and enclosures, rated 600 volts maximum, and intended to be employed as dead-front switchboards in accordance with the National...
891
February 14, 1994
UL Standard for Safety Dead-Front Switchboards
A description is not available for this item.
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References

This document references:
CSA C22.2 NO 0.15 - Adhesive labels
Published by CSA on January 1, 2015
This Standard applies to permanent adhesive labels and nameplates intended for use indoors or outdoors on application surfaces that are essentially clean, smooth, flat, or simple curved.* * See Annex...
This document references:
CSA C22.2 NO 0.5 - Threaded conduit entries
Published by CSA on January 1, 2016
A description is not available for this item.
This document references:
CSA C22.2 NO 115 - Meter-mounting devices
Published by CSA on January 1, 2020
This Standard applies to indoor or outdoor meter-mounting devices, and combination meter-mounting devices. These devices can be single position or multiple positions, either as complete...
This document references:
CSA C22.2 NO 14 - Industrial control equipment
Published by CSA on January 1, 2018
This Standard applies to control and protective devices, and accessory devices, rated at not more than 1500 V, for starting, stopping, regulating, controlling, or protecting electric motors,...
This document references:
CSA C22.2 NO 158 - Terminal blocks
Published by CSA on January 1, 2010
This Standard covers assemblies of wiring terminals and supporting blocks for copper conductors, copper and aluminum conductors, and aluminum conductors rated at a maximum of 1500 V and 2000 kcmil,...
This document is referenced by:
CSA C22.2 NO 62368-1 - Audio/video, information and communication technology equipment — Part 1: Safety requirements
Published by CSA on January 1, 2019
This part of IEC 62368 is applicable to the safety of electrical and electronic equipment within the field of audio, video, information and communication technology, and business and office machines...
This document is referenced by:
UL 2416 - UL Standard for Safety Audio/Video, Information and Communication Technology Equipment Cabinet, Enclosure and Rack Systems
Published by UL on March 11, 2015
This Standard covers requirements for Audio/Video, Information and Communication Technology Equipment Cabinet, Enclosure and Rack Systems. For the purpose of this Standard cabinet, enclosure and rack...
This document is referenced by:
UL 62368-1 - UL Standard for Safety Audio/video, information and communication technology equipment – Part 1: Safety requirements
Published by UL on December 13, 2019
This part of IEC 62368 is applicable to the safety of electrical and electronic equipment within the field of audio, video, information and communication technology, and business and office machines...
This document is referenced by:
62368-1 (ND) - UL Standard for Safety National Differences For UL 62368-1 Audio/video, information and communication technology equipment - Part 1: Safety requirements
Published by UL on December 13, 2019
A description is not available for this item.
This document is referenced by:
ANSI C37.121 - American National Standard for Switchgear Unit Substations Requirements
Published by IEEE on January 1, 1989
Foreword (This Foreword is not part of American National Standard C37.121-1989.) This new standard has been developed to outline the requirements for unit substations, utilizing other documents such...
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