Cada uno de los siguientes es un requisito NEC® para instalaciones de bandeja portacables EXCEPTO:
a. las secciones de bandeja portacables deben unirse de acuerdo con NEC Sección 250.96.
b. la bandeja portacables no metálica debe estar hecha de materiales retardadores de la llama.
c. las bandejas de acero o aluminio NUNCA pueden utilizarse como conductores para que los equipos hagan masa.
d. el cable de conductor único debe marcarse para el uso en la bandeja portacables.
c. las bandejas de acero o aluminio NUNCA pueden utilizarse como conductores para que los equipos hagan masa.
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All of the following are true statements about the federal conscription (draft) law EXCEPT
A. it allowed draftees to hire substitutes B. its provisions were unfair to the poor. C. it was passed despite a healthy rate of volunteers. D. men could pay $300 to purchase an exemption. E. it inspired resentment and riots.
Determine the number of degrees through which the minute hand moves from 4:20 to 5:10.
Fill in the blank(s) with the appropriate word(s).
In the above figure, when the wiper of R1 is moved upward, the voltage at the output of the summing amp goes more ____________________ (negative, positive), transistor Q1 turns on ____________________ (less, harder), C1 charges ____________________ (slower, faster), SCRs D1 or D2 turn on ____________________ (sooner, later) in the alternation, and ____________________ (less, more) current flows through the armature.
Fill in the blank(s) with the appropriate word(s).
Use the truth table to prove that
