installing new UPS for my office and needs electrical work...

[little_scrapper]

From Dr Charles Moore's Nov 1975 paper and from others:
"... our results indicate that the sharpened rod usually acted to protect itself by emitting ions whenever the electric field exceeded the breakdown threshold. The blunt rod, on the other hand, emitted ions with great difficulty...the fields around the blunt rod often large values that when breakdown did occur at the blunt rod a positive streamer could propagate for appreciable distances away from the blunt rod."

"Field trials in the summers of 1994-98 at Langmuir Labs have provided electric current measurements flowing from various shaped lightning rods. These were correlated to changes in electric fields caused by lightning discharges. Results of this work confirm earlier theoretical models about sharp vs blunt rod behavior. (3) Sharp rods are poorer receptors for lightning than blunt rods."

Again the point. In many fields where knowledge comes mostly from hearsay: what is popularly believed (without numbers) too often does not agree with reality.

OK sounds good. now I need one thing definded. What are we considering a "blunt" rod? Are we talking a rod where the end is like a half sphere or a pointy rod that is NOT sharp.

For example hehe:


I couldnt resist!

the reason i need the details is because i will end up making my own out of stock rod. Thats why I was asking about solid vs braided and such. Hell if i am going to pay someone thousands of dollars to do something that i can easily fabricate myself once i have the details.