March 2004

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 2002 Code Book.

Code Quiz brought to you by Robert Keis


Question #1:

The NEC requires a dedicated receptacle circuit rated 20-amperes to be installed in dwelling unit bathrooms.  How is this load computed when making the service load calculation for this dwelling unit?

(A) A 1,500 volt-ampere load is added on
(B)
No additional load calculation is required
(C)
A 180 volt-ampere load is added on
(D)
A 1,200 volt-ampere load is added on
 

Question #2:

Small appliance receptacle loads in dwelling units are computed at how many volt-amperes per circuit?

(A) 1,500 volt-amperes per outlet
(B)
180 volt-amperes per outlet
(C)
1,500 volt-amperes per circuit
(D) 
None of the above
 

Question #3:

When using the optional calculation for dwelling unit service loads an 11 kW range would be computed at how many volt-amperes?

(A) 11,000 volt-amperes
(B)
8,000 volt-amperes     
(C)
46 amperes
(D)
None of the above
 

Question #4:

Two wall-mounted ovens and one counter-mounted cooking unit are to be installed in one room.  What does the code require or permit for the connection of these three units? 

(A) The three nameplate loads can be added together and treated as one range.   
(B)
Each appliance must be computed separately and wired separately.
(C)
The two ovens can be treated as one unit and the range top as a separate unit.
(D) 
None of the above
 

Question #5:

A commercial kitchen has the following electrical equipment.  One water heater, one dishwasher booster heater, two deep-fryers, one range, one hood exhaust fan.  The code allows commercial kitchen equipment to be computed using demand factors. What is the demand factor permitted for the above equipment? 

(A) 90 percent
(B)
80 percent   
(C)
70 percent   
(D)
65 percent
 

Question #6:

Using the optional calculation to determine the main service conductors (120/240) for a six unit multi-family dwelling, each unit has a “total net general load” of 19,280 volt-amperes (See Example D2(c) in the ‘99 or ‘02 code) and a “Total calculated service load” of 40,040 vA or 166.8 amperes.  Each apartment is connected with a 200 ampere rated feeder.  Each unit has a heat pump and supplemental heat from the example.  Both the indoor and outdoor units could run at the same time.  What size service conductors are required by code to supply the entire building?  There are no house loads.

(A) 1,200 amperes
(B) 440 amperes
(C) 594 amperes   
(D)
830 amperes
 

Question #7:

An office building contains 16,210 sq. feet of space. There are 210 fixtures rated 277-volts at .63 amperes each. The minimum ampacity of the feeder to supply the lighting shall be __________ amperes. The voltage is 480/277Y.

(A) 44   
(B) 
55
(C)
68    
(D)
85
 

Question #8:

Receptacle loads in guest rooms of hotels and motels are computed at how many volt-amperes each?

(A) 180 volt-amperes each
(B)
1,500 volt-amperes per circuit
(C)
No load calculation required
(D) 
None of the above
 

Question #9:

When sizing service or feeders that contain electric heating loads, these heat loads are computed at what percentage? 

(A) 150 percent of the total load
(B) 125 percent of the total load
(C)
115 percent of the total load
(D)
100 percent of the total load 


Question #10:

Circuits which supply lighting units that have ballasts, transformers, or autotransformers are to have the circuit loads computed based on which of the following? 

(A) The total wattage of the lamps
(B)
The total lumen output of the lamps
(C)
The total ampere ratings of the units
(D)
None of the above


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If you find any discrepancies please feel free to email E.T.E. at http://www.elec-toolbox.com/email.htm.

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