RSES CMS Controls Practice Questions - RSES Certificate Member Specialist (CMS) - Controls Exam

In an HVAC ladder (line) diagram, what do the two vertical lines on the left and right represent?

The neutral and ground conductors The two power-supply rails (L1 and L2 or hot and neutral) of the control circuit The high-voltage line and low-voltage line The supply air and return air paths

Correct Answer:

The two power-supply rails (L1 and L2 or hot and neutral) of the control circuit

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