Thhn - Study guides, Class notes & Summaries

What is the result if the neutral wire becomes open on a multiwire circuit having unequal loads? Select one: a. The load of higher resistance would overheat and probably be damaged. b. The load of lesser resistance would overheat and probably be damaged. c. No effect until one load is turned off or opens. d. No effect. The load of higher resistance would overheat and probably be damaged. Refer to Figure 128.202. ___ volts are applied across the water heater element. S...

NEC Exam prep questions and answers, graded A+ There are six conductors in a raceway connected to 75 degree Celsius rated breakers. Each wire has a 70 amp load using THHN conductors. The minimum size conductors used are #_________AWG. A. 4 B. 6 C. 8 D. 10 A. #4 60 degree column (110.14(C)) adjust from 90 degree column 95 x .8 = 76a Thermal insulation shall not be installed within __________ inches of recessed fixtures. A. 1/2 B. 3/4 C. 2 D. 3 D. 3 410.116(B) Brainpower Read ...

When testing a water level supervisory switch serving a pressure tank a signal shall indicate if the water level _____________from the required level (NFPA 72, Table 14.4.3.2 17 (j) (4) - ANS - rises or falls over 3 inches If combination audible/visible appliances are installed the location of the installed appliance shall be determined by the requirements of _______. (Nfpa 72 18.4.8.1) - ANS - the visible appliance What is the maximum number of 12 gauge THHN wires that can be installed in...

According to the NEC®, the ampacity of branch circuit conductors must be derated when there are more than how many current-carrying conductors in a raceway? - correct answer 3 Air conditioning overcurrent protective devices can never exceed what percentage of the motor-rated load current or the branch circuit selection current (whichever is greater)? - correct answer 225% Conductors must be derated when installed in conduit - correct answer on or above rooftops Continuous loads are cal...

Journeyman Electrician Practice Test Questions and Answers (Graded A)Journeyman Electrician Practice Test Questions and Answers (Graded A)Journeyman Electrician Practice Test Questions and Answers (Graded A)Journeyman Electrician Practice Test Questions and Answers (Graded A) Conductors with _____ marked on the insulation are NOT approved for use in a wet location. - ANSWER-THHN conductors with THHN insulation are approved for use in dry and damp locations only and conductors with THWN, THHW...

Journeyman Practice Test Questions and Answers 100% CorrectJourneyman Practice Test Questions and Answers 100% CorrectJourneyman Practice Test Questions and Answers 100% CorrectJourneyman Practice Test Questions and Answers 100% Correct There are six conductors in a raceway connected to 75° rated breakers. Each wire has a 70-amp load using THHN conductors. The minimum size conductor used are #__________ AWG. a. 4 b. 6 c. 8 d. 10 - ANSWER-a Thermal insulation shall not be installed with...

NICET 2 EXAM 2024 WITH 100% ACCURATE SOLUTIONS Where located above floor (within 2.1m or 7ft.) cables shall be securely fastened at intervals of? - Precise Answer not more than 18 inches Which cable types can be installed in fireproof riser shafts? - Precise Answer FPLP, FPLR, and FPL How many THHN conductors can fit in a 3/4 size Rigid PVC conduit? - Precise Answer 17

Residential Wiring Final Exam Review with Complete Solutions What is the standard voltage for most residential electrical systems in the U.S.? A) 120V B) 240V C) 480V D) 120/240V Which type of circuit is designed to protect against overloads in a household? A) Series circuit B) Branch circuit C) Parallel circuit D) Ground circuit What is the primary purpose of a circuit breaker in residential wiring? A) To enhance electrical flow B) To protect against overcurrent C) To reg...

When testing a water level supervisory switch serving a pressure tank a signal shall indicate if the water level _____________from the required level - PRECISE ANSWER rises or falls over 3 inches (NFPA 72, Table 14.4.3.2 17 (j) (4) If combination audible/visible appliances are installed the location of the installed appliance shall be determined by the requirements of - PRECISE ANSWER the visible appliance (Nfpa 72 18.4.8.1) What is the maximum number of 12 gauge THHN wires that can be ins...

Second Year IEC Final Exam Questions and Answers 100% Pass ______ in utility transmission lines reduces the power losses in the transmission conductors. increasing the voltage ______ shall not support luminairs weighing over 6 lb. lampholder _______ surrounds the windings in typical "pole-mounted" transformers. oil 40C = ____ F 104 A .25KVA transformer has a nameplate rating of 240/480 primary volts 120/240 secondary volts. IF rated voltage is applied to the primary the sec...