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structured cabling I

Lesson 4: Safety Codes

QuestionAnswer
Who establishes the flame rating for cables? NEC
Riser cables are used in vertical passages connecting one floor to another. true
With communications cables, what designation is expected to be printed on a cable listed for use in the following locations? Plenum of an office building → CMP, Residential basement → CMX (CM, CMR or CMP), Riser within an office building → CMR (or CMP), Stud wall within an office building → CM (CMR or CMP)
A particular 4-pair 24 gauge cable is marked “UL Listed Type CMP”. Can this cable be used for fire alarm circuits if it is placed within the plenum area of an office building? yes
The NEC requires cables to pass a test for combustion toxicology to be listed for plenum use. false
An office suite has a ceiling hanging from the concrete floor above. The space between the ceiling and the floor above is not connected to any air ducts. This space ? considered to be a plenum area. is not
The main telephone equipment room is approximately 200 ft from the point where the outside cable enters the basement. where's the best place to terminate the outside cable and place the primary protection? In the basement, as close as practicable to the point of entrance
telecommunications cables and some power cables, separated by a distance of 130 feet, buried directly between two buildings located on his property. Where will safety requirements for this type of installation be found? NEC
Who develops procedures for testing electrical equipment and cables? UL
The purpose of firestopping is to restore the integrity of fire-rated walls and floors after they have been penetrated. true
Which of the following is not an approved material for firestopping? Clear Silicon caulking
Communications general-purpose cables may not be used in office spaces to connect from a wall jack to a computer. false
What method of firestopping should be considered when there is an area where cable activity occurs on a regular basis? pillows
? fire stopping provides an instant fire stop and is ideal for retrofit work in occupied areas. putty
A compartment or chamber to which one or more air ducts are connected and forms part of the air distribution system defines a(n) ? . plenum
Mechanical firestops incorporate metal frames containing elastomeric modules fitted to the cables with some method of applying compression to the assembly. true
? publishes the NEC every three years. NFPA
Created by: Yusosweet1
 

 



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