Quiz

Overvoltage Protection

1. Which Article in the 2020 NEC was added because two articles were combined relating to surge protective devices?
(a) Art 311 Medium Voltage
(b) Art 310.16 Ampacity of Insulated Conductors
(c) Art 242 Overvoltage Protection
(d) Art 337 Type P Cable

2. A plug strip with built in SPD’s that is connected to a branch circuit is usually a_____
(a) Type 1 SPD
(b) Type 2 SPD
(c) Type 3 SPD
(d) Not classified

3. Which SPD is only installed as a component device by a manufacturer?
(a) Type 1 SPD
(b) Type 2 SPD
(c) Type 3 SPD
(d) Type 4 SPD

4. Which use is permitted for a surge protective device rated at 1000 volts or less without specific listing?
(a) On solidly grounded systems
(b) On corner grounded systems
(c) On Impedance grounded systems
(d) On ungrounded systems

5. When it comes to S.C.C.R. and SPD’s, which rule(s) applies?
(a) SPD’s may be installed at any point on a circuit
(b) the SPD shall be marked with a short circuit current rating
(c) S.C.C.R. marking requirements for SPD type receptacles apply
(d) all rules apply

6. The minimum copper wire size for SPD’s rated at 1000 volts or less - line and grounding conductors is______.
(a) #8 AWG
(b) #10 AWG
(c) #12 AWG
(d) #14 AWG 
 

Answers:

1. (c) Ref: Art 242
2. (c) Ref: Art 242.16
3. (d) Ref: Art 242.18
4. (a) Ref: Art 262.6
5. (b) Ref: Art 242.10
6. (d) Ref: Art 242.28