Two Minute Drill – Residential 3

Two Minute Drill – Residential 3
Improving your skill in code Look Up Increasing Speed Drill Copyright 2008, 2011, 2014, 2017 Ted "Smitty" Smith

Directions Copyright 2008 Ted "Smitty" Smith
Be sure to put the presentation in Slide Show Mode. This will activate the timer once you click on this slide. Each slide will transition to the correct answer automatically in 2:00 minutes. The correct answer will transition in 15 seconds. When you come to the slide with a Stop Sign, the timed portion will be done. Click on that slide to progress through the same questions without the timer. ONCE YOU ARE DONE WITH THE TIMED PORTION: VERY IMPORTANT: TAKE THE TIME TO ACTUALLY LOOK UP EACH OF THE ANSWERS> EVEN THOSE YOU KNEW THE ANSWER TO> PART OF THE DRILL IS TO TAKE YOU REPETITIVELY TO THE SECTION OF THE NEC YOU MAY NEED TO USE FOR THE EXAM. THE MORE YOU DO THIS< THE MORE SUCCESSFUL YOU WILL BE. Directions Copyright 2008 Ted "Smitty" Smith

SOME THINGS TO REMEMBER
Receptacle and switch locations for dwelling units are found in and minimum branch circuits for Dwelling units are found in (C). All dwelling units must have a minimum rating of 100 A regardless of the calculated load. Single Family Dwelling Load determinations are made based on Article 220 Sometimes loads are listed in amperes and volts and you will need to convert them to Watts or Vas by using Ohms Law. P=I x E Sometimes loads will be listed as Motors with only a voltage and HP. You will need to determine the Ampere rating first using the Tables in and Then you will need to use ohms law to determine the VA. SOME THINGS TO REMEMBER Copyright 2008 Ted "Smitty" Smith

b. 125% of the Service rating c. 83% of the Service rating
1. The ungrounded service entrance conductors of a one family dwelling are required to have an ampacity of at least ________________. a. 60 A b. 125% of the Service rating c. 83% of the Service rating d. 70% of the Service rating Copyright 2008 Ted "Smitty" Smith

2. When calculating the general lighting and general –use receptacle load for a dwelling unit, the _______________ dimension of the dwelling is to be used. a. inside b. long c. short d. outside Copyright 2008 Ted "Smitty" Smith

3. When calculating the service for a dwelling unit, electric clothes dryers are to be calculated at a _______________ watts or the nameplate, whichever is greater. a. 3500 b. 4000 c. 5000 d. 5500 Copyright 2008 Ted "Smitty" Smith

4. Determine the demand, in VA, on the ungrounded service entrance conductors of a single-family dwelling for an electric clothes dryer that has a current rating of 30 Amperes at 240 volts? a VA b VA c VA d VA Copyright 2008 Ted "Smitty" Smith

5. Determine the demand on the main service entrance of a single-family dwelling of the following fastened in place appliances: ½ HP garbage disposal at 120 V, ¾ HP trash compactor at 120 V, 7 ½ HP Air conditioner at 240 V, and 3.8 kW water heater at 240 volts. a VA b VA c VA d VA Copyright 2008 Ted "Smitty" Smith

6. What is the minimum number of lighting and general-purpose receptacle circuits required for a single family, one level dwelling unit that has an outside measurement of 65’ x 23’. Assume 15 A circuits at 120 V and assume there is no garage or unfinished basement suitable for future use. a. 2 b. 5 c. 4 d. 3 Copyright 2008 Ted "Smitty" Smith

7. Counter top spaces separated by range tops, refrigerators or sinks shall be considered ___________________ when determining the minimum number of receptacles which are required. a. the same counter top space b. separate countertop spaces c. the same counter top space if the space on either side is less than 24 inches wide. d. None of the above Copyright 2008 Ted "Smitty" Smith

8. An island countertop in a dwelling unit kitchen shall have a minimum of _______________ receptacles installed for the purpose of countertop receptacles? Assume the counter top is 8 feet long and has a cook top installed in the center which is 4 feet long. The edge of the counter top is 22 Inches from the back edge of the cook top. a. 1 b. 2 c. 3 d. 4 Copyright 2008 Ted "Smitty" Smith

9. Disregarding exceptions, where residential lighting outlets are installed in interior stairways, there shall be a wall switch provided ______________. a. 12 inches b. 18 inches c. 24 inches d. 30 inches Copyright 2008 Ted "Smitty" Smith

End of Drill Click the left mouse button to advance back to the first question. Each question will now be repeated without the timer to give you a chance to review it and find the answer. Clicking the left mouse button will advance the slide to the answer and the code reference. VERY IMPORTANT: TAKE THE TIME TO ACTUALLY LOOK UP EACH OF THE ANSWERS> EVEN THOSE YOU KNEW THE ANSWER TO> PART OF THE DRILL IS TO TAKE YOU REPETITIVELY TO THE SECTION OF THE NEC YOU MAY NEED TO USE FOR THE EXAM. THE MORE YOU DO THIS< THE MORE SUCCESSFUL YOU WILL BE. Copyright 2008 Ted "Smitty" Smith