41. Calculate the clearing time of a 3 cycle duty power circuit breaker for a 138 kVolts, 60 Hz switchyard. A 0.0167 sec C. 0.05 sec B. 0.0833 sec D. 0.13 sec

Refer to the National Electrical Code® or the working drawings when necessary. Where applicable, responses should be written in complete sentences. For problems 1 and 2, six luminaires, similar to Style E used in the Commercial Building, are to be installed in a room that is 12 ft x 18 ft (~3.7 m x ~5.5 m) with a 9 ft (2.8 m) floor-to-ceiling height. The spacing ratio for the luminaire is 1:0. 1. The maximum distance that the luminaires can be separated and achieve uniform illuminance is ft ( m). For problems 2-5, two luminaires, 8 ft (2.5 m) and 4 ft (1.2 m) in length with dimensions as shown in Figure 15-7, are to be installed in tandem (end to end). The end of the long luminaire is to be 2 ft (600 mm) from the wall. 2. The center of the outlet box should be roughed in at ft ( m) from the wall. 3. The first support should be installed at the wall. ft ( m) from 4. The second support should be installed at from the wall. ft ( m) 5. The final support should be installed at the wall. ft…

A.a.Two electricians are discussing industrial cabling. Electrician A says that copper cable provides clearer transmission signals than fiber optic cable. Electrician B says that fiber optic cables will be larger thancopper cables with identical data transmission rates. Who is correct?B. Both Electrician A and Electrician B are correct.C. Only Electrician A is correct.D. Neither Electrician A nor Electrician B is correct.  A.b. Two electricians are discussing industrial cabling. Electrician A says that signal losses in fiber optic cableare more likely to be caused by splices and connectors than cable length. Electrician B says that wire-wrapterminations should be used when there isn't enough time available to use IDC terminations. Who iscorrect?A. Only Electrician A is correct.B. Both Electrician A and Electrician B are correct.C. Only Electrician B is correct.

Explain a DPDT switch with a drawing and how they work. Also explain NC and NO on the drawing.     Please answer in typing format please ASAP for the like Please it's urgent

Please go into detail on What are Ring Counters, and Please show as many examples as possible.