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UL - 891

UL Standard for Safety Switchboards

active, Most Current
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

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...
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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