can also be protected using taller air terminals that create zones of protection using the rolling sphere method so the sphere does not contact the flat or gently sloping roof area.

directly on bedrock, the conductor shall be secured to the bedrock every 0.9 m (3 ft.) by nailing, conductive cement, or a conductive adhesive to ensure electrical contact and protect against movement.

Lightning protection for a house or building usually consists of 3 components: an air terminal (lightning rod or Franklin rod), a down conductor, and grounding. Dimension A in both figures is 20 or 25 feet and is the maximum spacing recommended by the NFPA between lightning rods.

An air terminal must be connected to a main size conductor and should never be attached directly to a carbon fiber mast or fitting. Air terminals are placed such that the zone of protection covers all occupied areas of the boat.

4.7 Zones of Protection. The geometry of the structure shall determine the zone of protection. One or more methods, as described in 4.7.1 through 4.7.3.4.2, shall be used to deter-mine the overall zone of protection. 4.7.1 Roof Types. The zone of protection for the following roof types shall include the roof and appurtenances where

Protecting structures with flammable vapors, gases, masts and overhead ground wires to create a catenary air terminal lightning protection system.

The lower lightning protection levels (LPL II, III & IV) each increase the air-terminal spacing, reducing their ability to capture smaller lightning flashes, thus reducing overall the percentage of lightning events they can protect against.

When installing an air terminal, the tip of the terminal must be at least ? Above the object or area it is to protect. Electrically continuous structural steel may be used as a strike termination device or main lightning protection conductor if it at least ? Thick. Air terminals must be placed within ?

To protect life and property by providing a non-destructive low resistance path to ground. Is the building in the image fully within the zone of protection? The tip of an air terminal shall not be less than how many inches above the object or area it is to protect? Which bonding condition applies to a 65-foot-tall metal antenna?

The design of the lightning protection system should be such that air-terminations are positioned to provide protection against lightning flashes to the roof and all items located upon it (vents, skylights, air-handling units, pipes, etc).