Practice Code Look Up Two Minute Drill 15

Directions Left click on the presentation ICON located at the bottom of the slide directory to the left of the this slide. Each slide will transition to the correct answer automatically in 2: 00 minutes. The correct answer will transition in 10 seconds. You may also left click on the slide to manually transition. Do not worry about writing down the correct answer for now. You will have the opportunity to do that at the end of the two minute drill Good luck Remember to start the slide show to activate the timer. Copyright 2005 Ted "Smitty" Smith

FURTHER MORE This drill is a mixture of calculations and code look up questions. You have seen many of them before. Focus on time. Try to find all the answers before the slide transitions. Remember do not worry about writing down the right answer for now. When you reach the end all of the slides will be repeated without the timer so you can take your time to find the ones you missed and write down the correct answers then. Click on the slide to proceed. Copyright 2005 Ted "Smitty" Smith

Conductors 1. Equipment grounding conductors shall be permitted to be sectioned within a listed multiconductor cable, provided the combined ________ complies with 250. 122. A. B. C. D. Current and load Voltages of all applied loads Circular mill area None of the above Copyright 2008 Ted "Smitty" Smith

Conductors Where bare or covered conductors are installed with insulated conductors, the temperature rating of the bare or covered conductor shall be _______ for the purpose of determining ampacity Equal to the lowest temperature rating of the insulated conductors Equal to the highest temperature rating of the insulated conductors Equal to the average temperature ratings of the insulated conductors. None of the above Copyright 2005 Ted "Smitty" Smith

Conductors A 2 AWG TW conductor is installed in a location where the ambient temperature is expected to be 108 degrees F. The temperature correction factor for conductor ampacity in this location is _____. . 96 . 88 . 82 . 71 Copyright 2005 Ted "Smitty" Smith

Conductors If the ambient temperature is 30 degrees C, the minimum insulation that a conductor must have and still have the capacity to carry current is _____ 60 C 105 C 90 C Any of these Copyright 2008 Ted "Smitty" Smith

Conductors Determine the minimum sized THHN aluminum conductor that can be installed to feed a load of 104 amperes that is located in a freezer that has an ambient temperature of 22 degrees Celsius. 1 AWG 2 AWG 3 AWG 1/0 AWG Copyright 2008 Ted "Smitty" Smith

Conductors The ampacity of six-current carrying 10 AWG RHW aluminum conductors in a raceway in an ambient temperature of 75 degrees F is ______ › › 30 A 22 A 16 A 12 A Copyright 2005 Ted "Smitty" Smith

Raceway Enclosures for switches or over current devices shall not be used as junction boxes, auxiliary gutters, or raceways for conductors feeding through or tapping off to other switches or over current devices, unless adequate space for this purpose is provided. The conductors shall not fill the wiring space at any cross section to more than _______ percent of the cross-sectional area of the space. › › 20 25 35 40 Copyright 2005 Ted "Smitty" Smith

Raceways A 200 A feeder installed in Schedule 80 rigid non-metallic conduit has three 3/0 AWG THHN, one 2 AWG THHN and one 6 AWG THHN conductors. What is the minimum sized raceway required? 2 inch 2. 5 inch 3. 5 inch Copyright 2005 Ted "Smitty" Smith

Raceways What size outlet box is required for one 12/2 NM cable that terminates on a switch, on 12/3 NM cable that terminates on a receptacle, and the box has manufactured internal cable clamps. › › 4 x 1 1/4 square 4 x 1 1/2 square 4 x 2 1/8 square None of these Copyright 2005 Ted "Smitty" Smith

Grounding Machine screw type fasteners that engage not less than two and thread forming machine screws that engage not less than two threads in the enclosure may be used to mount equipment grounding bars, buses and lugs to enclosures. › True › False Copyright 2005 Ted "Smitty" Smith

Calculations What is the net computed demand load for the air conditioning and heat for a 40 unit multifamily building that has an air conditioner ( 3 hp, 3. 91 k. W 230 V) and two baseboard heaters (3 k. W) in each unit. › › 160 k. W 240 k. W 6 k. W 5 k. W Copyright 2005 Ted "Smitty" Smith

Calculations What is the demand load on the main service entrance of an apartment complex that is supplied with a 120/208 V single phase service for twelve 3. 25 k. W ovens? 10 k. W 18 k. W 15 k. W 20 k. W Copyright 2005 Ted "Smitty" Smith

Calculations What is the general lighting load for a dwelling unit with 2, 700 square feet of living space not including open porches, garages, or unused or unfinished spaces not adaptable for future use? › › 8100 VA 12600 VA 2700 VA 6480 VA Copyright 2005 Ted "Smitty" Smith

Calculations If the total demand is 30 k. W for a 120/240 V dwelling unit, what is the minimum sized service and feeder copper conductor size allowed? 4 AWG 3/0 AWG 2 AWG 1/0 AWG Copyright 2005 Ted "Smitty" Smith

Calculations What is the demand on the main service entrance of a single family dwelling of a range with a nameplate rating of 13. 9 k. VA at 240 volts? › › 8000 VA 8800 VA 9600 VA 10000 VA Copyright 2005 Ted "Smitty" Smith

Services The disconnecting means for surge protective devices shall not be considered a disconnecting means when determining the maximum number of handles for the service disconnecting means. True False Copyright 2005 Ted "Smitty" Smith

Grounding Metal enclosures and raceways for service conductors and equipment shall be connected to the ________ system conductor if the electrical system is grounded or to the ________ conductor for electrical systems that are not grounded. Grounded/ ungrounded Grounded/ grounding electrode Grounding/ grounded None of the above Copyright 2005 Ted "Smitty" Smith

THE END Each of the slides will now be repeated. They are not timed in this segment. To change a slide, click on the side with your left mouse button. Be sure to physically look up the answers in your code book to improve your look up speed and skill. Copyright 2005 Ted "Smitty" Smith