Briefly discuss panelboard installations that do not require a main protective device and then outline situations in which individual protection is required.
What will be an ideal response?
Panelboards are available with standard main ratings of 100, 225, 400, 600, 800, and 1200 amperes. These panelboards may be installed without a main protective device and can be connected directly to a feeder protected at not more than the rating of the panelboard. Individual protection is required on lighting and appliance panelboards when these panelboards are connected to the secondary of a transformer having only primary protection.
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A system contains two components, A and B. The system will function only if both components function. The probability that A functions is 0.98, the probability that B functions is 0.95, and the probability that either A or B functions is 0.99. What is the probability that the system functions?
What will be an ideal response?
____ life cycle refers to the observation and examination of a building over the course of its entire life.
A. Engineering B. Environment C. Process D. Building
Determine the length of one of the bases of a trapezoid if the area of the trapezoid is 510.0 square feet. The height is 20.0 feet and one of the bases is 14.0 feet.
Fill in the blank(s) with the appropriate word(s).
Which component supports the wheel and attaches to the control arms?
A) Spindle B) Shock absorber C) Sway bar D) Ball joint