Quiz on the Code

2020 NEC® Updates

1. What is the minimum  size of conductor for voltage ratings up to and including 2000 volts, except where permitted elsewhere in the Code?
(a) #12 Cu   
(b) #14 Cu
(c) #16 Cu
(d) #18 Cu

2. Physical protection of grounding electrode conductors smaller than #6 requires use of a raceway. Which listed raceway is not permitted?
(a) GRC
(b) PVC Sched. 40
(c) PVC Sched. 80 
(d) EMT

3. When counting the ground wires in a nonmetallic box, if 4 # 12 wires and two # 14’s are found,      how many total cubic inches are to be allowed for these conductors?
(a) 2.25”³
(b) 2.375”³
(c) 2.75”³
(d) 3.375”³

4.   A certain type of cable was removed from the NEC because it is no longer manufactured. What type of cable was it?
(a) Type P
(b) Type NMC
(c) Type NMS
(d) Type TTFF

5.   Red brass conduit is permitted for which wiring methods ________.
(a) Pool wet niche fixtures 
(b) hazardous locations
(c) Underground
(d) All of the above.
        
6. For securing type NM cable adjacent to the scuttle hole in an attic what article does the code direct you to find these dimensions?
(a) Article 350 Type LFMC 
(b) Article 320 Type AC Cable
(c) Article 334 Type NM Cable
(d) Article 348 Type FMC

Answers:  
1. (b)
2. (b)
3. (d)
4. (c)
5. (d)
6. (b)