1
NFPA ______is the standard for the Installation of Lighting protection systems.
NFPA 780
_______ __ _____ are used on structures that do not exceed 75' in height and include lighting conductors, air terminals, ground electrodes and other related fittings.
Class 1 Materials
The use of the word "_____"indicates a mandatory requirement.
Shall
There are four main parts of a lighting protection system. The first part intercepts the lighting strike via strike termination devices that are also known as ___ ______.
Air Terminals
The maximum distance between supports for lighting protection cables is ______.
3'
A ______ _____ is part of a lighting protection system such as a ground rod, ground plate electrode, or ground conductor, that is installed for the purpose of providing ______ ______ with the Earth.
Grounding Electrode, Electrical Contact
______ _______ are made of copper-clad steel, soild copper, or stainless steel and should be installed below the _______ line if possible.
Grounding Electrodes, Frost
_______ _______ cannot be installed in locations subject to _______ or come into direct contact with the earth.
Aluminum Materials, Excessive moisture
When a product is _______, it means that there is some sort of a symbol or identifying mark from an organization that is acceptable to the AHJ.
Labeled
Air Terminals must be placed at or within ____of ridge ends on pitched roofs or at the edges and outside corners of fat or gently sloping roofs.
24" or 2'
A _______ ______ ______ is made up of one or more main size conductors, each in its own trench extending outward from the location of the down conductor. The Radials must not be less then 12" long, and installed _____ ____ then 18" below grade, they must also diverge at angles not greater than 90 degrees according to NFPA 780.
Radical Electrode system, Not less
The minimum diameter of a Class 1 Air terminal is____ ____.
3/8 Inch.
______ ____ must be driven to a depth of not less than ____ into the earth.
Ground Rods, 10'
The minimum requirements for a class 1 Aluminum main lighting conductor are _____ strand size, 95 pounds/1000ft weight per length, and a cross-sectional area of 98,600 circular mils.
14 AWG
where ground rods are used for grounding electrodes, the must be in contact with the earth for minimum of _____ and extend to a depth of not less than ____ below finished grade, except as permitted by the requirements of shallow soil.
8ft, 10ft
There are six main roof architectural types, Flat, Mansard, gambrel, gable, hip, and ______ gable.
Broken
A structure with electrically continuous structural members of sufficient size to provide an electrical path that is equivalent to lighting protection conductors is called a ______ ______ structure.
Metal Framed
A ______ ________ is used for potential equalization between grounded metal bodies and a lighting protection system.
Bonding Conductor
The space adjacent to a lighting protection system that is protected from a direct lighting strike is called the ____ __ ________.
Zone of Protection
In other structures, such as wood framed structures, the lighting protection down conductors and other grounded media must be interconnected with a loop conductor at intermediate levels not exceeding _____.
60ft
In a lighting protection system, a ______ conductor carries ______ currents between strike termination devices and grounding electrodes.
Main, Lightning
________ ________ are used to intercept lighting protection down conductors, grounding electrodes or other grounded media.
Loop Conductors
______ _______ must not be installed in concrete or masonry, the alkali content will rapidly corrode ______.
Aluminum conductors, aluminum
_______ 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
The Voltage Protection rating (VPR)selected by the manufacture is based on the measured limiting voltage determined when a surge protective device is subjected to a combination waveform with an open circuit voltage of 6KV and a short circuit current of ___ KA.
3Ka