LIGHNING PROTECTION AND COOLING TOWER
LIGHNING PROTECTION AND COOLING TOWER
(OP)
What is criteria to provide a Lightning Protection for the Cooling Towers ???
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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LIGHNING PROTECTION AND COOLING TOWER
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RE: LIGHNING PROTECTION AND COOLING TOWER
Visit
http://www.nfpa.org
for a copy
RE: LIGHNING PROTECTION AND COOLING TOWER
RE: LIGHNING PROTECTION AND COOLING TOWER
NFPA 780 and UL are the two sources of criteria for lightning protection installations in the US.
Keep in mind, this whole question is largely academic unless you are the LP system installer. What you need for your installation is a "UL Master Label", which is provided by the installer. Your installer is the one who will determine what he needs to do before he slaps the label on there (and he'll do that in accordance with NFPA 780 and UL). So long as he's reputable, and gives you the label, it shouldn't much matter to you what the criteria are (other than things like if you want the cables exposed/concealed, copper vs. aluminum, etc).
RE: LIGHNING PROTECTION AND COOLING TOWER
In the UK, use BS5266,
If in Europe or elsewhere there is an IEC also (but I cant recall the number but you can find it.
http://www.iec.ch/
Other places such as Singapore also have their own lighning codes.
_______________________________________
Regards -
Colin J Flatters
Consulting Engineer & Project Manager
RE: LIGHNING PROTECTION AND COOLING TOWER
RE: LIGHNING PROTECTION AND COOLING TOWER
www.europexltd.com
SEB
RE: LIGHNING PROTECTION AND COOLING TOWER
The Franklin cone of protection is not dependent on any particular type of air terminal. Some manufacturers of air terminals claim their devices attract lighting thereby providing broader protection of the Franklin cone area. NFPA780 and U.L. do not recognize that claim.
RE: LIGHNING PROTECTION AND COOLING TOWER
Install or Not to Install LIGHTNING PROTECTION for existing Cooling Tower. In that Area, a new Cooling Tower is installed with the LIGHTNING PROTECTION.
my question was -
RE: LIGHNING PROTECTION AND COOLING TOWER
There is a Risk Analysis procedure included in the back of NFPA 780 that helps add some objectivity to this question. Given the locality (and frequency of thunderstorms), the site details (on a hill, surrounded by higher buildings, etc), the nature & criticality of the business (explosives warehouse, communications center, etc), and the cost of operations, it will assign a number which corresponds to how strongly LP is recommended.
Your insurance company may have some thoughts on this too, you might want to check with them.
Other than that, it largely comes down to gut feeling. Lots of people who have never experienced a hit think it's all a waste of money. Then, after they take a hit, they install LP every time. Of course, it's kind of silly to put it in AFTER the lightning's hit!!!
RE: LIGHNING PROTECTION AND COOLING TOWER
RE: LIGHNING PROTECTION AND COOLING TOWER
http://www.lightningmaster.com/Early_Streamer-2.htm
for:
The level of protection is calculated according to Appendix B of the French standard NF C 17-102.
RE: LIGHNING PROTECTION AND COOLING TOWER
Most manufacturers do not offer no-damage guarantees for Faraday systems. Insteady they provide a U.L. "Master Label", which certifies the materials and installation comply with standards. Some manufacturers of other types of systems have a no-damage guarantee.
RE: LIGHNING PROTECTION AND COOLING TOWER
RE: LIGHNING PROTECTION AND COOLING TOWER
RE: LIGHNING PROTECTION AND COOLING TOWER
RE: LIGHNING PROTECTION AND COOLING TOWER
One comment on JBartos reply : Early streamer technology is not approved by NFPA and draft standard NFPA 781 never saw the light of the day !!!
///I never stated anywhere that it was approved by NFPA. NFPA selected Faraday Cage (Rolling Sphere) lightning protection concept that is very good except it tends to be more demanding on lightning protection hardware volume and labor; therefore, it tends to be more expensive. Those who adhere to Faraday Cone claim that this approach is sufficient, equally good as the Faraday Cage concept, if properly applied. Ultimately, it will be the local Fire Chief who decides which concept is adequate, i.e. local Authority Having Jurisdiction.\\\