Final answer:
GFCI devices are required on construction sites to minimize electrical hazards by interrupting power when a leakage current greater than 5 mA is detected. There are no specific exceptions mentioned for not using GFCIs at construction sites as they are mandated by OSHA regulations.
Step-by-step explanation:
The question regards the use of Ground Fault Circuit Interrupter (GFCI) protected receptacles for temporary power in construction sites and if there are any exceptions for their use.
GFCIs are a safety mechanism that quickly interrupts power to prevent electric shock by detecting imbalances between the live/hot and neutral wires, suggesting leakage currents to unintended paths. These devices trip the circuit if leakage currents are higher than 5 mA to ensure the maximum harmless shock is not exceeded.
Apart from the direct answer, GFCIs are also fundamental in preventing shock hazards by continuously comparing currents in the two wires, tripping as needed. The standards for temporary power in construction sites mandate GFCI protection to minimize electrical hazards.
However, this detailed explanation does not highlight specific exceptions for construction sites, which typically must follow OSHA regulations mandating GFCI use for all temporary power outlets.