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10 SPAN-IGM User Manual Rev 2
Notices
6. The primary and secondary lightning protections should be as close to the building's entrance as
possible. Where feasible they should be mounted onto the grounding plate itself. See Figure 1,
Primary and Secondary Lightning Protection on page 10.
Figure 1: Primary and Secondary Lightning Protection
These installation instructions are the minimum requirements for receiver and antenna installations.
Where applicable, follow the electrical codes for the country of installation. Examples of country codes
include:
• USA National Electrical Code (NFPA 70)
• Canada Canadian Electrical Code (CSA C22)
• UK British Standards Institute (BSI 7671)
Ref # Description
1 Primary lightning protection device
2 Secondary lightning protection device
3 External antenna
4 GNSS Receiver
5 To ground
6 Grounding plate or grounding point at the building’s entrance
Acceptable choices for Earth Grounds, for central buildings, are:
• Grounded interior metal cold water pipe within five feet (1.5 m) of the point where it
enters the building
• Grounded metallic service raceway
• Grounded electrical service equipment enclosure
• Eight-foot grounding rod driven into the ground (only if bonded to the central
building ground by #6, or heavier, bonding wire)