Describe the various electrical codes.
What will be an ideal response?
Both the design and installation of electrical systems are carefully regulated by electrical codes. The National Fire Protection Association sponsors the model code, the National Electrical Code® Requirements for One- and Two-Family Dwellings, as well as a series of Standards Publications related to electrical safety and equipment. The International Code Council offers the publication International Code Council Electrical Code, which details information related to the administration and enforcement of the NFPA National Electrical Code®. Underwriters Laboratories, Inc. (UL), tests and certifies electrical devices. Approved electrical devices carry the UL label.
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Answer the following statements true (T) or false (F)
Since a clone has a single genotype, all plants of that clone will grow identically everywhere it is planted.
Letter C is pointing to a _____.
a. king stud
b. trimmer stud
c. header
d. cripple stud
The switch 1 in the circuit shown below has been closed for a long time before it is opened at t = 0 and the switch 2 has been opened for a long time before it is closed at t = 0. Find the voltage v(t) across the capacitor for t ? 0. Assume R1 = 6 k?, R2 = 3 k?, R3 = 1 k?, R4 = 2 k?, R5 = 1 k?, Is = 1 mA, Vs = 6 V, C = 0.4 ?F.
You are driving a vehicle that could safely be driven at 55 mph on an open road. But traffic is now heavy, moving at 35 mph though the speed limit is 55. The safest speed for your vehicle is most likely:
a. 25 mph b. 35 mph c. 45 mph d. 55 mph