Yes, you can choose to have the system inspected by a UL engineer but ONLY if the system was installed by a UL listed installer.. When my system was installed I received a UL certificate after the inspection in 2007. The price at the time was in the $300-400 range. Unfortunatley, UL has since doubled their prices to make it cost prohibitive for most people to have such an inspection. The Study Group on Lightning has lobbied UL to set a one day price and then have UL conduct 4 survays in a day to bring the cost down. So far to no avail. If you have a system installed by a non-UL installer my advice would be to have it inspected by one of the three listed installers. They should be able to tell you if it meets NFPA 780, the national standard on lightning.
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