Author Question: What is the minimum current rating for the disconnect switch of a unit with a minimum circuit ... (Read 90 times)

MGLQZ · **on:** Jul 24, 2018

What is the minimum current rating for the disconnect switch of a unit with a minimum circuit ampacity rating of 45 A?

A) 45 A 1.25 = 56.25 A B) 45 A 1.15 = 51.75 A
C) 45 A D) 45 A 1.5 = 67.5 A

Question 2

What are proportional controls?

A) Proportional controls integrate the signals from several sensors and control the system operation based on the proportion of sensors requiring conditioning.
B) Proportional controls increase or decrease the output of a controlled device in proportion to the level of the measured condition.
C) Proportional controls regulate the starting and stopping of the system to keep the run time ratio as low as possible.
D) Proportional controls have the ability to measure the controlled variable and the system output and dynamically adjust the setpoint to achieve more precise control.