Lightning Suppressor Guidelines - Symmetricom TimeSource 3100 User Manual

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Lightning Suppressor Guidelines

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Warning:
the cable conduit are not allowed. The ring clamp acts like a choke coil to induce
currents, which resists current flow and hampers proper lightning protection.
Warning:
may induce arcing.
Note:
defeated.
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Warning:
TimeSource 3100
Engineering and Ordering
097-72020-01 Issue 9: November 2003
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Mount the lightning suppressor within 4.6 meters of a valid, direct, low impedance,
low resistance, earth ground connection point. Valid earth grounds include the roof
ring ground system, building structural steel, or a Central Office ground plate. If the
grounding point is inside the building, mount the suppressor within 15 meters of the
cable entry into the building.
Metal clamps that form a complete metal circle around the antenna cable or
Place the lightning suppressor away from electrical devices or cabling that
Keep all impedances as low as possible, otherwise the grounding scheme may be
Route the ground wire as straight as possible (bends in the ground wire increase
impedance at lightning frequencies), in accordance with local company practices.
Treat all exposed connections with an electrically conductive anti-corrosion
compound (Kopr-Shield or equivalent).
Avoid small-radius turns and unnecessary turns.
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