Smitty’s Two Minute Drill #1: Feeders and Branch Circuits

Smitty’s Two Minute Drill #1: Feeders and Branch Circuits
A drill to help you improve your code skills and your ability to find answers in the code book. © Ted “Smitty” Smith 2016, 2017

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 5 seconds. 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

Question 1 An outlet installed for the purpose charging electric vehicles shall be supplied by a ________________ branch circuit. This circuit shall have no other outlets. A. Listed B. Separate C. Multi-wire D. None of the above Copyright 2005 Ted "Smitty" Smith

Question 3 Tire inflation and automotive vacuum machines provided for public use shall be protected by a ____________________. A. Listed over current device rated at 125% of the full load current B. arc-fault circuit interrupter C. Duel element fuse rated at 80% of the full load current D. ground-fault circuit interupter Copyright 2005 Ted "Smitty" Smith

Question 3 answer D. Ground-fault circuit interupter 422.23
Copyright 2005 Ted "Smitty" Smith

Question 4 Loads for new circuits or extended circuits in other than dwelling units shall be calculated with ______________, as applicable. A. a #2 pencil and paper B. A scientific programmable calculator C. either or D. a derating factor of 75% or 80% Copyright 2005 Ted "Smitty" Smith

Question 4 Answer C. 220.12 or 220.14 220.16(B)

Question 5 Branch circuits shall not be derived from autotransformers unless the circuit supplied has a grounded conductor that is ______________________ ___________________ _____ a grounded conductor of the system supplying the transformer. Sized larger than Noncontiguous electrically to Electrically connected to Separated completely from Copyright 2005 Ted "Smitty" Smith

Question 5 C. electrically connected to 210.9

Question 6 What is the minimum height that the auxiliary equipment of electric discharge lamps can be mounted on poles for athletic fields if the voltage rating for the equipment is 600 volts? 10 feet 18 feet 22 feet 30 feet Copyright 2005 Ted "Smitty" Smith

Question 6 answer C. 22 feet 210.6(D)(1)(a)

Question 8 Outdoor mobile home disconnecting means shall be installed so the bottom of the enclose containing the disconnecting means is not less than _________ above the finished grade or working platform. A. 2 feet B. 6 feet, 7 inches C. 10 feet D. 12 feet Copyright 2005 Ted "Smitty" Smith

Question 9 Where the positive polarity of a dc system does not serve as the connection point for the grounded conductor, each positive ungrounded conductor shall be identified by:[ Select the answer that is incorrect.] A. a continuous red outer finish B. a continuous red stripe durably marked along the conductors entire length on insulation of a color other than green, white, gray or black C. a continuous red stripe durably marked marked along the conductors entire length on insulation of a color other green, white, or gray. D. imprinted plus signs (+) or the word POSITIVE or POS durably marked on insulation of a color other than green, white, gray or black. Copyright 2005 Ted "Smitty" Smith

Question 9 answer C. a continuous red stripe durably marked marked along the conductors entire length on insulation of a color other green, white, or gray. Missing that it can not be black wire 210.5(C) (2) (a) (1-3) Copyright 2005 Ted "Smitty" Smith

Question 10 Where connected to a branch circuit supplying two or more receptacles, a 20 ampere rated branch circuit shall be allowed to supply ______________ rated receptacles. A. 15 ampere receptacles B. 20 ampere receptacles C. Both A and B D. Neither A or B Copyright 2005 Ted "Smitty" Smith

Question 10 Answer C. Both A and C 210. 21 (B)(3)

Question 11 The minimum feeder conductor size shall have an allowable ampacity not less than the maximum load to be served after the application of _________________________. A. any adjustment or correction factors. B. temperature derating adjustments in accordance with C. conduit fill derating corrections based on Table 5 D. continuous duty rating of loads based on Copyright 2005 Ted "Smitty" Smith

Question 11 Answer A. any adjustment or correction factors.
215.2(A)(1)(b) Copyright 2005 Ted "Smitty" Smith

Question 12 Vegetation such as trees may be used for support of overhead conductor spans if the attachment point is at least 8 feet above the ground and secured with a device listed for the purpose. A. True B. False Copyright 2005 Ted "Smitty" Smith

Question 13 The grounded conductor for a service feeder shall not be smaller than the minimum size as required by ___________________. The authority having jurisdiction 250.24(C) The electrical engineer None of the above Copyright 2005 Ted "Smitty" Smith

Question 13 answer 250.24(C) 230.42(C)

Question 14 The equipment branch of the Essential Electrical System of a health care facility shall be installed and connected to the alternate power source such that the equipment is automatically restored to operation at ________________. A. no more than 10 seconds from loss of power B. no more than 30 seconds from loss of power C. no more than 2 minutes from loss of power D. at appropriate time-lag intervals following the energizing of the essential electrical system. Copyright 2005 Ted "Smitty" Smith

Question 15 At least one receptacle shall be installed at each peninsular countertop space with a long dimension of 24 inches or greater and short dimension of __________ inches or greater. A. 6 B. 9 C. 12 D. 18 Copyright 2005 Ted "Smitty" Smith

Question 15 Answer C. 12 210.52(C)(3)

End of Drill Click on this slide to continue to the repeat of the questions. The timer will not operate in this section. Click on each slide to advance. Review the questions and look up the answers. Copyright 2005 Ted "Smitty" Smith

Question 1 An outlet installed for the purpose charging electric vehicles shall be supplied by a ________________ branch circuit. This circuit shall have no other outlets. A. Listed B. Separate C. Multi-wire D. None of the above Copyright 2005 Ted "Smitty" Smith

Question 3 Tire inflation and automotive vacuum machines provided for public use shall be protected by a ____________________. A. Listed over current device rated at 125% of the full load current B. arc-fault circuit interrupter C. Duel element fuse rated at 80% of the full load current D. ground-fault circuit interupter Copyright 2005 Ted "Smitty" Smith

Question 3 answer D. Ground-fault circuit interupter 422.23

Question 4 Loads for new circuits or extended circuits in other than dwelling units shall be calculated with ______________, as applicable. A. a #2 pencil and paper B. A scientific programmable calculator C. either or D. a derating factor of 75% or 80% Copyright 2005 Ted "Smitty" Smith

Question 4 Answer C. 220.12 or 220.14 220.16(B)

Question 5 Branch circuits shall not be derived from autotransformers unless the circuit supplied has a grounded conductor that is ______________________ ___________________ _____ a grounded conductor of the system supplying the transformer. Sized larger than Noncontiguous electrically to Electrically connected to Separated completely from Copyright 2005 Ted "Smitty" Smith

Question 5 C. electrically connected to 210.9

Question 6 What is the minimum height that the auxiliary equipment of electric discharge lamps can be mounted on poles for athletic fields if the voltage rating for the equipment is 600 volts? 10 feet 18 feet 22 feet 30 feet Copyright 2005 Ted "Smitty" Smith

Question 6 answer C. 22 feet 210.6(D)(1)(a)

Question 8 Outdoor mobile home disconnecting means shall be installed so the bottom of the enclose containing the disconnecting means is not less than _________ above the finished grade or working platform. A. 2 feet B. 6 feet, 7 inches C. 10 feet D. 12 feet Copyright 2005 Ted "Smitty" Smith

Question 9 Where the positive polarity of a dc system does not serve as the connection point for the grounded conductor, each positive ungrounded conductor shall be identified by:[ Select the answer that is incorrect.] A. a continuous red outer finish B. a continuous red stripe durably marked along the conductors entire length on insulation of a color other than green, white, gray or black C. a continuous red stripe durably marked marked along the conductors entire length on insulation of a color other green, white, or gray. D. imprinted plus signs (+) or the word POSITIVE or POS durably marked on insulation of a color other than green, white, gray or black. Copyright 2005 Ted "Smitty" Smith

Question 9 answer C. a continuous red stripe durably marked marked along the conductors entire length on insulation of a color other green, white, or gray. Missing that it can not be black wire 210.5(C) (2) (a) (1-3) Copyright 2005 Ted "Smitty" Smith

Question 10 Where connected to a branch circuit supplying two or more receptacles, a 20 ampere rated branch circuit shall be allowed to supply ______________ rated receptacles. A. 15 ampere receptacles B. 20 ampere receptacles C. Both A and B D. Neither A or B Copyright 2005 Ted "Smitty" Smith

Question 10 Answer C. Both A and C 210. 21 (B)(3)

Question 11 The minimum feeder conductor size shall have an allowable ampacity not less than the maximum load to be served after the application of _________________________. A. any adjustment or correction factors. B. temperature derating adjustments in accordance with C. conduit fill derating corrections based on Table 5 D. continuous duty rating of loads based on Copyright 2005 Ted "Smitty" Smith

Question 11 Answer A. any adjustment or correction factors.
215.2(A)(1)(b) Copyright 2005 Ted "Smitty" Smith

Question 12 Vegetation such as trees may be used for support of overhead conductor spans if the attachment point is at least 8 feet above the ground and secured with a device listed for the purpose. A. True B. False Copyright 2005 Ted "Smitty" Smith

Question 13 The grounded conductor for a service feeder shall not be smaller than the minimum size as required by ___________________. The authority having jurisdiction 250.24(C) The electrical engineer None of the above Copyright 2005 Ted "Smitty" Smith

Question 13 answer 250.24(C) 230.42(C)

Question 14 The equipment branch of the Essential Electrical System of a health care facility shall be installed and connected to the alternate power source such that the equipment is automatically restored to operation at ________________. A. no more than 10 seconds from loss of power B. no more than 30 seconds from loss of power C. no more than 2 minutes from loss of power D. at appropriate time-lag intervals following the energizing of the essential electrical system. Copyright 2005 Ted "Smitty" Smith

Question 15 At least one receptacle shall be installed at each peninsular countertop space with a long dimension of 24 inches or greater and short dimension of __________ inches or greater. A. 6 B. 9 C. 12 D. 18 Copyright 2005 Ted "Smitty" Smith

Question 15 Answer C. 12 210.52(C)(3)

Smitty’s Two Minute Drill #1: Feeders and Branch Circuits

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