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Old 01-30-2015, 01:46 PM   #1
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Default Cantenary lightining protection.

I have been approached to do some lightning protection on some small laydown tanks. There is no engineering, no drawing, no nothing. I will have to design it, if I do it. The only lighting protection that I have ever done (once), was a cantenary system. We basically ran bare 2/0 underground loop, then up the poles to airterminals, then pole to pole in a loop. We did it by an engineered drawing. Any ideas on design? We basically went 5' min off of the tanks with the overheads, and 3' deep on the ring, and 1/3 in the ground on the poles. Is this too much liability for a small industrial electrical contractor, without engineering? Or, caveat the proposal to eliminate liability, and install it?
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Old 01-30-2015, 02:43 PM   #2
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To me, that's not an electricians field to design. Would your liability insurance cover that project?
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Old 01-30-2015, 04:40 PM   #3
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Originally Posted by bobelectric View Post
To me, that's not an electricians field to design. Would your liability insurance cover that project?
That is a very good question. I'll have to check into that. But, I do know of some oilfield electrical contractors that do install it. No certs, or specialized licenses. But, maybe they are just chasing money around. Which, I guess we are all guilty of that. I just want to CMA. Would like to get into it. I have seen lots of it. I did install one system, but I had EE drawings for it.
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Old 01-30-2015, 07:09 PM   #4
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We did it on a large hospital. 179' genie lift, all in. Lost our ass. 3,000$ for UL inspection and he was very helpful the first time around. Very helpful, but made sure he came back another time. We sub bid it out and decided to do it ourselves. Now we hire sleeping bear to do it for us. It is definitely a specialty trade. Take a UL lightening protection class if you do it yourself.
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