We had all sorts of lightning issues at our primary tower 15 years ago. Here's what fixed it:
What we did was put a ground ring around the tower, and another ring around the building connected to that ring. 150 ground rods interconnected with #2 solid copper cad welded to the rods. Each leg of the tower is cadwelded with #2 sold and that is cadwelded to the tower ring. >From that ring, we bring in #2 awg 'stingers', or connections into the building that the equipment gets grounded to. Rack, Routers, everything. Avoid ground loops. I would also recommend lightning dissapators that discharge the ion field before the strike ever happens. A ground rod with it's own #2 from the top of the tower should also get connected to the ring. Shielded ethernet cables everywhere since the emf from the lightning couples into the high impedance line and fries ports. APC UPS's on all AC, TrippLite IsoBar surge protectors or TrippLite PDUs on all AC connections. All radio cables coming from outside are shielded and grounded. All those go to grounded surge protectors. All RF cables have grounded polyphaser surge protectors (these rock). Knock on wood, not an issue since then (10+ years). Marco Coelho Argon Technologies Inc. -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
