NEMA/IEC equipment tests electrical selector switches, motor control centers, enclosures, pilot lights, and conduit fittings. In oil test, component is subjected to liquid stream at min 2 gpm, from every angle at 12-18 in. distance for 30 min. In dust test, component is suspended in chamber while being exposed to talcum powder air current. Endurance test involves having component close and open test circuit having applicable voltage, current, and power factor.