A
Lightning strikes are dispersed through the LPS through which of the 4 components?
Ground Electrodes
For lightning protection systems, aluminum down conductors must transition to copper, using a listed bi-metallic connector, at a minimum of ? inches above where they come in contact with the earth.
18"
Lighting protection run in metallic conduit must be?
bonded at both ends
The depth of a ground rod must not be less than how many feet?
10 Feet
? provides requirements for surge protection systems installed for electrical systems, communications systems (including but not limited to CATV, alarm, and data), and antenna systems, as well as other electrical system hardware.
NFPA 780
When transitioning from aluminum to copper what type of fittings must be used?
Bi-Metallic
When installing lightning protection, roofs having a span of ? feet or less and a pitch of 1/8 or greater are considered to be pitched.
40
Long vertical reinforcing steel members must have additional connections to the lightning protection conductor at intervals not exceeding ? feet.
200
At what building height do you need a ground loop conductor?
60 feet
Surge protective devices must be installed at all points where an electrical or electronic system conductor leaves a structure to supply another structure if the conductors or cable are run over ? .
100 Feet
What is the minimum size wire for a Class 1 aluminum grounding main?
14 AWG
An air terminal must be how tall above the object its protecting?
10"
ground rods must be in contact with the ground for how many feet?
8 feet
In reinforced concrete structures, where reinforcement is interconnected and grounded to the lightning protection system, the lightning protection system down conductors and other grounded media must be interconnected with a loop conductor at intermediate levels not exceeding ? feet.
200 feet
Air terminals must be placed at or within ? of ridge ends on pitched roofs or at the edges and outside corners of flat or gently sloping roofs.
2 foot
Bonding plat must have how many square inches of a bonding surface?
8 square inches
Air terminals must be placed within ? of the outside corner or edge of the object they are protecting.
24"
Electrically continuous structural steel may be used as a strike termination device or main lightning protection conductor if it is at least ? thick.
3/16" thick
The maximum distance between supports for lightning protection cables is ? .
3 feet
When installing lightning protection systems, grounded and ungrounded metal bodies exceeding ? feet in vertical length must be bonded to structural steel members as near as practical to their extremities unless inherently bonded through construction at these locations.
60 foot
Prior to making an exothermic connection what must you do?
Clean the surface to bare steel.
? must be connected to the structural steel framing either by direct connection or by the use of individual conductors routed through the roof or parapet walls to the structural steel framework or by the use of an external lightning conductor that interconnects all strike termination devices.
Strike termination devices
Grounding electrodes used for lightning protection systems are manufactured from copper-clad steel, solid copper and ? materials.
Stainless steel
If a product is listed for grounding purposes, it is automatically listed for lightning protection purposes.
False
Class II materials are used on structures that exceed ? in height. They are generally larger or heavier than Class I materials.
75'