Which type of protection is required for personnel for all temporary wiring installations?

In temporary wiring installations, personnel protection is crucial to prevent electrical shock hazards. The correct answer is GFCI, which stands for Ground Fault Circuit Interrupter. GFCIs are designed to protect individuals from electric shock by monitoring the current flow and shutting off the power when an imbalance is detected, typically as small as 4 to 6 milliamps. This is especially important in temporary setups where wiring may not be as robust or securely installed as it is in permanent installations, increasing the risk of accidental contact with live circuits.

GFCIs are mandated by electrical codes for locations where water is present, such as construction sites or outdoor setups, ensuring safety in environments where the risk of conductive surfaces is higher. By utilizing GFCIs in temporary wiring, you can significantly reduce the risk of electrical shock, making them an essential component of personnel safety in these situations.