Which statement correctly describes heating with respect to voltage and ON/OFF state?

• A. The drain masts heat only when the ON/OFF state is ON.
• B. The drain masts heat whenever 115VAC power is applied to the controller, regardless of the ON/OFF state.
• C. The drain masts heat whenever 230VAC is applied to the controller.
• D. The drain masts never heat.

Answer: (B)

Heating of the drain masts is tied to the presence of the 115 VAC power on the controller, not to whether the ON/OFF control is actively turning outputs on. When 115 VAC is applied, the controller’s internal circuitry draws current and dissipates power as heat, so the drain masts warm up regardless of the ON/OFF state. Using a different voltage, like 230 VAC, would be a separate condition and isn’t what this scenario describes. Saying they never heat contradicts the fact that powered electronics always dissipate some heat.