Quiz on the Code

Motors

1. When considering type CC fuses, their values are based on the  ______ column in Table 430.52. 
 (a) nontime delay
 (b) time-delay
 (c) instantaneous trip
 (d) inverse time trip

2. In Article 430.22, the purpose of adding 25% ampacity to for the conductors supplying a motor is for ______.
 (a) starting current of the motor
 (b) allowing wiring sales to increase
 (c) reducing the probability of a short circuit because of overheated wiring
 (d) continuous duty of the motor

3. Which condition(s) allow for an OL device to be rated at 1.25% of the motor FLA?
 (a) service factor of 1.2
 (b) thermally protected motor
 (c) temperature rating of 35°C
 (d) Both answer (a) & (c).

4. A wound rotor induction motor uses which component(s)?
 (a) resistor grid
 (b) brushes
 (c) commutator rings
 (d) All of the above.

5. An “EP” motor is an ______ motor.
 (a) earth proven ground
 (b) electronically
programmable
 (c) electronically protected
 (d) None of the above.

6. For an adjustable speed drive the size of the incoming conductors must be based on ______.
 (a) 125% of the code book ampere rating of the motor
 (b) 125% of the input current rating of the adjustable speed drive system
 (c) 115% of the input current rating of the adjustable speed drive system
 (d) 125% of the output current rating of the adjustable speed drive system

Answers:  

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