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 1953 OUTLINE

UL Outline of Investigation for Power Distribution Blocks

active, Most Current
Buy Now
Organization: UL
Publication Date: 1 July 2020
Status: active
Page Count: 20
scope:

These requirements cover power distribution blocks that are rated 1000 volts or less and intended to be used on either the line side or load side of service equipment in accordance with the National Electrical Code, NFPA 70. These requirements also cover power distribution blocks that are rated 1500 volts DC or less and intended to be used in photovoltaic applications in accordance with Article 690 of the National Electrical Code, NFPA 70. These blocks are used for splicing and tapping conductors in order to distribute power to separate circuits or loads.

A power-distribution block consists of one or more connectors mounted on an insulating base. Each connector has provision for one or more incoming conductors and multiple tap-off conductors. A tap-off conductor is of the same or smaller size as the incoming conductor. The connectors may be of the lay-in construction which do not require the incoming conductor to be terminated.

A power distribution block is intended to permanently support and insulate the wire terminations and joints of each polarity from each other, and from the surface on which the power distribution block is mounted. A power distribution block may also be provided with an insulating cover.

These requirements do not cover terminal blocks which are covered by the Standard for Terminal Blocks, UL 1059.

Document History

UL 1953 OUTLINE
July 1, 2020
UL Outline of Investigation for Power Distribution Blocks
These requirements cover power distribution blocks that are rated 1000 volts or less and intended to be used on either the line side or load side of service equipment in accordance with the National...
March 15, 2019
UL Outline of Investigation for Power Distribution Blocks
These requirements cover power distribution blocks that are rated 1000 volts or less and intended to be used on either the line side or load side of service equipment in accordance with the National...
August 29, 2014
UL Outline of Investigation for Power Distribution Blocks
These requirements cover power distribution blocks that are rated 1000 volts or less and intended to be used on either the line side or load side of service equipment in accordance with the National...
August 19, 2014
UL Outline of Investigation for Power Distribution Blocks
These requirements cover power distribution blocks that are rated 1000 volts or less and intended to be used on either the line side or load side of service equipment in accordance with the National...
July 25, 2008
OUTLINE OF INVESTIGATION FOR POWER DISTRIBUTION BLOCKS
These requirements cover power distribution blocks that are rated 600 volts or less and intended to be used on the load side of service equipment in accordance with the National Electrical Code, NFPA...
June 6, 2008
OUTLINE OF INVESTIGATION FOR POWER DISTRIBUTION BLOCKS
A description is not available for this item.
February 22, 2007
OUTLINE OF INVESTIGATION FOR POWER DISTRIBUTION BLOCKS
A description is not available for this item.
December 27, 2006
Outline of Investigation for Power Distribution Blocks
A description is not available for this item.
October 17, 1995
Outline of Investigation for Power Distribution Blocks
A description is not available for this item.

References

Advertisement