Which statement accurately describes the relationship between valve count and electrical load in irrigation circuits?

• A. More valves reduce current
• B. More valves require higher voltage
• C. More valves require more amps
• D. More valves require less insulation

Answer: (C)

Valves in irrigation circuits are typically 24 VAC solenoids wired in parallel. Each valve coil draws a certain amount of current based on its resistance, and the controller must supply the sum of those currents when multiple valves are energized. So, as you add more valves, the total current (amps) drawn from the power source increases, even though the supply voltage stays the same. This is why more valves require more amps.

The other ideas don’t fit: adding valves doesn’t raise the voltage the circuit needs to supply—the system is designed to keep the same voltage and handle the increased current. Insulation isn’t a factor in the immediate relationship between valve count and electrical load. If anything, the risk with more valves is voltage drop or transformer/wire capacity issues if the supply isn’t sized for the higher current.