Which statement describes the role of ON/OFF in heating when 115VAC is present?

• A. The drain masts heat only when 115VAC is applied and the ON/OFF is ON.
• B. The ON/OFF state has no influence on heating when 115VAC is applied.
• C. The drain masts heat when 230VAC is applied.
• D. The drain masts never heat.

Answer: (B)

Heating is driven by the presence of the 115VAC supply, and the ON/OFF control does not gate that heating path. When 115V is available, the heating element engages regardless of the ON/OFF position, because the switch isn’t in the heater’s circuit. The ON/OFF therefore has no influence on heating under 115VAC. The other statements would imply heating depends on the switch, only occurs at a different voltage, or never occurs, which doesn’t align with the fact that 115V presence alone causes heating.