May 2001

Test your knowledge of the code, by taking E.T.E.'s code quiz.
There are 10 questions, which are multiple choice.
Based on the 1999 Code Book.
Quiz by Robert Keis.

Question #1:
A nonmotor operated water heater rated 5.4 kW at 240-volt is connected with a piece of No. 6 copper THHN conductor. The appliance is not marked with a maximum OC device size. What is the maximum size of the overcurrent device permitted for this water heater?
(A) 50
(B) 40
(C) 35
(D) 30

Question #2:
Two small appliance circuits are connected as follows to a three-wire circuit. Line one to neutral has a 900 watt load connected to it. Line two to neutral has a 1300 watt load connected to it. With both loads turned on what is the wattage in the neutral?
(A) 2300
(B) 1300
(C) 900
(D) 400

Question #3:
The copper grounding electrode conductor required for a 1600-ampere service consisting of four sets of 750 kcmil THHN compact aluminum conductors in parallel is:
(A) 2/0       
(B) 3/0
(C) 250 kcmil
(D) 400 kcmil

Question #4:
What is the maximum size dual element fuse permitted to protect a 60 hp. 3-phase, 480-volt squirrel-cage motor that is connected with a piece of No. 3 copper THHN conductor?
(A)  80
(B) 125
(C) 150
(D) 175

Question #5:
A No. 14 THHN copper conductor is used within a motor starter as a control circuit conductor. What is maximum size circuit breaker permitted for the motor short-circuit, ground-fault protection that will protect this conductor?
(A) 15
(B) 20
(C) 45
(D) 100

Question #6:
What is the computed lighting load in amperes for a 208Y/120 feeder to supply an office area that is 125’ x 157’ and which has an unknown receptacle load?
(A) 307
(B) 245
(C) 413
(D) 293

Question #7:
A mobile home park has 35 mobile home lots connected to one service. Each mobile home has a calculated demand of 21,400 vA. What is the minimum size of the service conductors in amperes to service this park?
(A) 559
(B) 749
(C) 3,120
(D) 3,500

Question #8:
The minimum headroom of the working space in front of a 200-amp. panelboard in which the top "Main" circuit breaker is mounted 6ft 5 in. to the center of the breaker and the top of the panelboard is installed at a height of 6’11" in a new dwelling unit is _______ .
(A) No minimum
(B) 6ft. 5 in.
(C) 6 ft. 6 in.
(D) 6 ft. 11. in.

Question #9:
Which of the following is required for a receptacle installed under the eaves of a two-story dwelling to be used for fixed outdoor deicing and snow-melting equipment?
(A) Ground-fault circuit-interrupter protection for personnel must be provided.
(B) Ground-fault protection of equipment must be provided
(C) A dedicated 20-ampere circuit must be provided
(D) A dedicated 15-ampere circuit must be provided.

Question #10:
Branch-circuit conductors within 3 in. of a ballast within the ballast compartment shall have an insulation temperature rating not lower than _____ oC.
(A) 60
(C) 90
(D) 105

Thanks for taking E.T.E.'s Code quiz!

If you find any discrepancies please feel free to email E.T.E. at

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