8/16/2023 0 Comments Lightning strikes near meNo changes were made in the collector concept, beyond the addition of up to four points being oriented in several directions, usually 90° from the vertical. However, some changes were made in the appearance, application or deployment methods for the lightning collector/conductor. Franklin’s work, up to early 1960, no significant concept changes or improvements were made. Random unorganized statistics formed the basis for all conclusions and recommendations resulting in a “we always did it that way” attitude.įrom the completion of Dr. All of these statements were made without any reference to any form of foundational physics. Golde(1) concluded a study of strike collection system data and reaffirmed the conclusion of Oliver Lodge and Richard Anderson from their work that “acceptance of a fixed value for the area protected by a lightning conductor is unjustified.” Then, expressing in a more positive manner: “The attractive range of a lightning conductor should be regarded as a statistical quantity depending primarily on the severity of the lightning strike.” They further added that “a lightning strike of average intensity would be attracted over a distance of about twice the height of the conductor.” Then a subsequent “however” described several mitigating factors that would compromise those estimates. Again, because there was no foundational physics, no test data or organized statistics presented to justify the manufacturer claims, they continued in use because of the lack of alternatives or other acceptable standards. The effectiveness of the Franklin System of stroke collection has been questioned for over 100 years. Since both of these views lacked a physical foundation or statistical data at that time, the debate continued until very recently. Shortly after its introduction, a controversy developed between those who believed in sharp pointed rods and blunt rods. Subsequently, it became known as the “Franklin System”, and the more contemporary name is the “lightning conductor”, air terminal or lightning rod. Franklin introduced a lightning strike collection system. Protection against direct lightning strikes has been a subject of controversy since the days of Dr.
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