Consider SPD Installation on Main Panel 

The main electrical panel and sub-panels that provide power to the building’s systems and sensitive electrical equipment are not provided with a surge protection device (SPD).  Because there have been repeated lightning-related losses at this facility, we recommended your organization consider providing such protection at the main panel and key sub-panels, and standardize the type of plug-in SPD units used at high-value/critical equipment.  As a general rule, plug-in SPDs should have a visual indicator to show that it is functioning properly, built in short circuit protection, a correct wiring indicator (for the outlet into which it is plugged) and be UL 1449 listed (3rd ed.).  Many of the retail units sold as surge protection are actually listed as a multi-tap outlet and do not meet the more stringent testing and performance requirements of a true SPD. When possible, point-of-use SPDs should not only include the electrical supply but also any low voltage signal lines, such as phone, data, CATV and radio coax.  Without having all conductor lines run through the SPD to provide a common ground reference, equipment plugged into the unit may still be at risk. You may want to contact your radio installer or an electrical contractor familiar with surge protection issues for information on commercial units that may provide you with a better level of protection.  SPDs for the electrical distribution system should be listed by an approved testing agency such as UL, and should be designed/selected for the surges that they will be expected to handle and installed by a qualified contractor.