Voltec Power and Lighting has a full line of portable GFCI adapters including right angle and in-line configurations, to fit every application. Choose from both 15 A U-ground and 20 A locking configurations. GFCI's protect the user from an electrical shock resulting from an unequal flow of electricity caused by current leakage. The occupational safety and health administration (OSHA) regulations state "it is the employer's responsibility to provide GFCI's on all 120 V, single phase, 15 and 20 A receptacles on job sites that are not part of the permanent wiring of the structure".