Subject 2564 (2566, 2567, 2569, 2570, 198M, 248-1, 248-14, 2367, 497)

Bulletin Dated: March 25, 2008

Summary of Topics

This bulletin announces the availability of the outline Subject 2564, Outline of Investigation for Low-Voltage Surge Withstand Telecommunications Overcurrent Protector Components, Subject 2566, Outline of Investigation for PART 2: Low-Voltage Surge Withstand Telecommunications Fuses, Subject 2567, Outline of Investigation for PART 3: Low-Voltage Surge Withstand Telecommunications Polymer Positive Temperature Coefficient Thermistor (PPTC), Subject 2569, Outline of Investigation for PART 5: Low-Voltage Surge Withstand Telecommunications Line Feed Resistor (LFR), Subject 2570, Outline of Investigation for PART 6: Low-Voltage Surge Withstand Telecommunications Electronic Current Limiters (ECL).

Subject 248-1 (248-2, 248-3, 248-4, 248-5, 248-6, 248-7, 248-8, 248-9, 248-11, 248-12, 248-13, 248-14, 248-15)

Bulletin Dated: May 5, 2005

SUMMARY OF TOPICS

This bulletin proposes the following changes in requirements:

The attached comment matrix documents the comments received on the November 4, 2004 proposal bulletin and the responses to these comments. Revisions to proposed requirements based upon these comments are attached to this bulletin.

COMMENTS DUE: June 2, 2005

Subject 248-1 ( 248-2, 248-3, 248-4, 248-5, 248-6, 248-7, 248-8, 248-9, 248-11, 248-12, 248-13, 248-14, 248-15)

Bulletin Dated: November 4, 2004

SUMMARY OF TOPICS

These UL 248 proposals include increased use of International symbology, clarifications, editorial revisions, establishment of minimum samples in the Operation Test for Fuses, the addition of Canadian requirements for Class K fuses with Class H dimensions, miniature fuse requirements, withdrawal of body temperature requirements and the addition of 600 V ratings to Class T fuses.

STP BALLOTS AND ALL COMMENTS DUE: DECEMBER 6, 2004