UNLIMITED FREE ACCESS TO THE WORLD'S BEST IDEAS

close
Already an Engineering360 user? Log in.

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

Customize Your Engineering360 Experience

close
Privacy Policy

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

UL 797

UL Standard for Safety Electrical Metallic Tubing

inactive
Buy Now
Organization: UL
Publication Date: 27 July 2000
Status: inactive
Page Count: 36
scope:

1 effective July 27, 2001

These requirements cover steel electrical metallic tubing (EMT) and elbows in trade sizes 3/8 - 4 (12 - 103), for use as a metal raceway for the installation of wires and cables in accordance with the National Electrical Code. The values in parentheses are metric designators of tubing.

Steel electrical metallic tubing is provided with an exterior coating of zinc or a zinc-based, nonmetallic, or other alternate corrosion-resistant material and an interior coating of an organic or zinc material. Each of these exterior and interior coatings provides an acceptable level or corrosion resistance in normally corrosive environments. It is a user's responsibility to determine the appropriate product for their application.

Aluminum electrical metallic tubing is covered by the Standard for Electrical Metal Tubing - Aluminum, Ul 797A.

Tubing provided with a nonmetallic alternate corrosion-resistant coating that is not marked with a temperature designation, or is marked "200 F", is for use in ambient temperatures not in excess of 200 degrees F (90 degrees C). It is not prohibited that tubing provided with a nonmetallic alternate corrosion-resistant coating that is for use at temperatures in excess of 200 degrees F be marked with a higher rating which has been evaluated in accordance with 11.2.3.1. See 16.5.

Tubing provided with a nonmetallic alternate corrosion-resistant coating that is not marked with a temperature designation, or is marked "32 F", is for use in ambient temperatures not below 32 degrees F (0 degrees C). It is not prohibited that tubing provided with a nonmetallic alternate corrosion-resistant coating that is for use at temperatures below 32 degrees F be marked with a rating which has been evaluated in accordance with the Cold Impact Test, Section 13, and 15.2.1. See 16.6.

A product that contains features, characteristics, components, materials, or systems new or different from those covered by the requirements in this standard, and that involves a risk of fire or of electric shock or injury to persons shall be evaluated using appropriate additional component and end-product requirements to maintain the level of safety as originally anticipated by the intent of this standard. A product whose features, characteristics, components, materials, or systems conflict with specific requirements or provisions of this standard does not comply with this standard. Revision of requirements shall be proposed and adopted in conformance with the methods employed for development, revision, and implementation of this standard.

Document History

November 30, 2007
UL Standard for Safety Electrical Metallic Tubing – Steel
These requirements cover electrical metallic tubing – steel (EMT) and elbows for use as a metal raceway for installation of wires and cables in accordance with CSA C22.1, Canadian Electrical Code,...
November 30, 2007
UL Standard for Safety Electrical Metallic Tubing – Steel
These requirements cover electrical metallic tubing – steel (EMT) and elbows for use as a metal raceway for installation of wires and cables in accordance with CSA C22.1, Canadian Electrical Code,...
November 30, 2007
UL Standard for Safety Electrical Metallic Tubing – Steel
These requirements cover electrical metallic tubing – steel (EMT) and elbows for use as a metal raceway for installation of wires and cables in accordance with CSA C22.1, Canadian Electrical Code,...
November 30, 2007
UL Standard for Safety Electrical Metallic Tubing – Steel
These requirements cover electrical metallic tubing – steel (EMT) and elbows for use as a metal raceway for installation of wires and cables in accordance with CSA C22.1, Canadian Electrical Code,...
November 30, 2007
UL Standard for Safety Electrical Metallic Tubing – Steel
These requirements cover electrical metallic tubing – steel (EMT) and elbows for use as a metal raceway for installation of wires and cables in accordance with CSA C22.1, Canadian Electrical Code,...
November 30, 2007
UL Standard for Safety Electrical Metallic Tubing – Steel
These requirements cover electrical metallic tubing – steel (EMT) and elbows for use as a metal raceway for installation of wires and cables in accordance with CSA C22.1, Canadian Electrical Code,...
June 30, 2004
UL Standard for Safety Electrical Metallic Tubing – Steel
These requirements cover electrical metallic tubing - steel (EMT) and elbows for use as a metal raceway for installation of wires and cables in accordance with CSA C22.1, Canadian Electrical Code,...
July 27, 2000
UL Standard for Safety Electrical Metallic Tubing - Steel
A description is not available for this item.
UL 797
July 27, 2000
UL Standard for Safety Electrical Metallic Tubing
1 effective July 27, 2001 These requirements cover steel electrical metallic tubing (EMT) and elbows in trade sizes 3/8 - 4 (12 - 103), for use as a metal raceway for the installation of wires and...
797
May 28, 1993
UL Standard for Safety Electrical Metallic Tubing
A description is not available for this item.
797
January 1, 1993
UL Standard for Safety Electrical Metallic Tubing
A description is not available for this item.

References

Advertisement