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UL 891

UL Standard for Safety Switchboards

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Organization: UL
Publication Date: 26 July 2005
Status: inactive
Page Count: 194
scope:

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 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 rms symmetrical short-circuit currents of not more than 200 000 A.

Document History

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...
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...
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.

References

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