WorksheetsCable Tray Installation Quiz
Total questions: 15
Worksheet time: 8mins
In which NEC® article is cable tray installation primarily addressed?
NEC Article 550
NEC Article 392
NEC Article 300
NEC Article 517
When a cable tray has a solid bottom, it is referred to as (a) .
Cable tray is generally manufactured in _____.
12' and 24' lengths
6' and 12' lengths
6' and 8' lengths
2' and 4' lengths
Which type of tray is best suited for corrosive areas and atmospheres?
Basket tray
Coated aluminum cable tray
Nonmetallic cable tray
Stainless steel cable tray
When a cable tray section branches off at 90°, the fitting is called a(n) _____.
wye
tee
divider strip
ell
A barrier strip is a _____.
strip used to provide the tray with added support
component installed in a raceway to separate certain types of cables
glass strip used as a cable tray insulator
metal strip used solely for grounding purposes
Which of the following is a violation of NEC Section 300.8?
Spacing tray rungs 9" or less apart
Running single conductors in trays that are larger than size 1/0
Placing a water line in the same tray with electrical conductors
Using nonmetallic tray systems in corrosive areas
The main purpose of vertical-adjustment splice plates is to _____.
increase the strength of a cable tray section
secure the cable within the tray
change the elevation in a run of cable tray
support the cable tray system
To protect a cable tray system from dropping objects that may damage the cable, use a _____.
solid bottom tray
tray cover
blind end
trough-type tray
Which of the following best describes how closely packed cables in a tray will be affected when energized?
Their efficiency will be decreased.
Their efficiency will be increased.
The operating temperature of each cable will be lower.
No change will be encountered.
When cable exits downward from a tray without a dropout plate in place, which of the following could occur?
Current surges
Voltage surges
Reduced amperage
Insulation and conductor stress
Cable tray ampacity information can be found in _____.
NEC Section 300.96
NEC Section 392.80
NEC Section 250.96
NEC Section 315.60
Cable in vertical trays should be supported _____.
per the manufacturer’s recommendations
every 24"
every 6" to 8"
every 12"
Which of the following statements about cable drops is true?
Cables may only leave a cable tray via a conduit or raceway.
A junction box is always required when a cable is dropped from a tray.
Any cable size smaller than 4/0 must be protected by conduit as it leaves a cable tray.
Where conduit is used to drop cable from a tray, the conduit must be secured to the tray with the proper fittings.
What is the term for a four-way cable tray fitting with each branch at a 90° angle to the other?
Wye
Cross
Dropout
Inside vertical riser
