UL Standard for Safety for Installation Requirements for Lightning Protection Systems, UL 96A Twelfth Edition, Dated May 23, 2007 

Summary of Topics Revision pages have been issued for the Standard for Installation Requirements for Lightning Protection Systems, 

UL 96A, to incorporate the proposals dated March 19, 2010 and July 9, 2010. These proposals include the following: Revision to scope. Addition of acceptable metals.

Revision to indicate size of bonding clamps. Air terminal bracing. Clarification of decorative items on air terminals. 

Clarification of requirements for metal handrail bonding. Replacement of Figure 8.4. Clarification of requirements for the down conductor. 

Addition of requirements for exothermic welding. Addition of requirements for concealed installations. Clarification of conductors employed on the roof area. 

Perimeter of a structure. Merging of paragraphs covering metallic pool enclosures and metallic screened enclosures. Removal of requirements for plated components on chimneys. 

Minimum thickness for Class II aluminum solid strip conductors. Main size conductors. 

Text that has been changed in any manner or impacted by UL’s electronic publishing system is marked with a vertical line in the margin. 

Changes in requirements are marked with a vertical line in the margin and are followed by an effective date note indicating the date of publication or the date on which

 the changed requirement becomes effective