Know the Details of Installation Codes & Standards
All Answers relate to NFPA 70, 2017 Edition
1. The UL standard that specifies the requirements for Police Station Connected Burglar Alarm Units and Systems is ________________.
A. 217
B. 365
C. 827
D. 1023
2. When boring holes into a framing member, what is the minimum permissible distance that must be maintained from the edge of the wood without protection from penetration?
A. 3/4 in.
B. 1 in.
C. 1 1/4 in.
D. 1 1/12 in.
3. A box or conduit body is required where cables enter or exit from conduit or tubing that is used to provide cable support or protection against physical damage.
A. True
B. False
300.15
4. A box or conduit body shall not be required where accessible fittings are used for straight-through splices in mineral-insulated metal-sheathed cable.
A. True
B. False
5. Where raceways contain ___________ insulated circuit conductors, and these conductors enter a cabinet, a box, an enclosure or a raceway, the conductors shall be protected by an identified fitting providing a smoothly rounded insulating surface, unless the conductors are separated from the fitting or raceway by identified insulating material that is securely fastened in place.
A. 4 AWG or larger
B. 14 AWG or larger
C. 18 AWG or smaller
D. non-
Feedback: 300.4 (A)
6. The UL Standard for Splicing Wire Connectors is __________
A. 240B
B. 110A
C. 489C
D. 1610
7. When performing box fill calculations, which of the following is true?
A. Locknuts, wire nuts and bushings shall be counted towards the box fill maximum.
B. No allowance shall be required for small fittings such as locknuts and bushings.
C. When using wires smaller than 16AWG, box fill requirements do not apply.
D. All of the above apply.
E. None of the above apply.
8. What is the stated requirement for the depth of outlet or device boxes?
A. Boxes must have a minimum depth of 2 in.
B. Outlet and device boxes must have a minimum open space of 4 cubic in.
C. Outlet and device boxes shall have an approved depth to allow equipment installed within them to be mounted properly and without likelihood of damage to conductors within the box.
D. Any box appropriately listed is acceptable for use.
314.24
9. Article 100 of the NEC contains two parts. Part 1 is for definitions used throughout the code. Part 2 contain definitions ___________.
A. only applicable to certain chapters.
B. applicable only to low-voltage installations and equipment.
C. applicable to installations and equipment operating at less than 1,000 volts, nominal.
D. applicable to installations and equipment operating at over 1,000 volts, nominal.
10. Surface metallic raceways are not permitted for use in Class 1, Division 2 hazardous locations.
A. True
B. False
386.10
What’s Wrong With This?
Can you identify the problem depicted in this photo?
Click here to see the answer.
Answer to Can You Identify This?:
The hole that was drilled into the box was the wrong size. Does that necessarily mean the installation is defective? No. The installer could have used reducing washers as a solution. Another good practice is installing an insulating bushing over the threads of the connector.
