What is a common issue that may result in normal DC voltage and zero current output in an ICCP system?

A broken cable to the anodes in an ICCP (Impressed Current Cathodic Protection) system can prevent the current from flowing to the anodes, even if the system shows a normal DC voltage. In essence, while the power supply may be functioning correctly and generating the necessary voltage, a break in the cable interrupts the path needed for current to flow, leading to a zero current output condition. This scenario highlights the importance of the physical integrity of connections in an ICCP system because the electrical circuit must be complete for proper operation.

In contrast, other choices may not directly lead to a scenario of normal voltage with zero current. For example, a short circuit in the anode may cause excessive current draw or lead to system failure and, typically, won't show normal voltage levels. An improperly grounded system could present its own set of issues but would not necessarily lead to this specific symptom. A malfunctioning power supply is likely to affect both current and voltage, thus not producing normal levels in either aspect.

Overall, identifying a broken cable as a potential issue emphasizes the importance of inspecting physical connections and cabling in troubleshooting ICCP systems.