Electrical appliances such as computers, printers, scanners, inverters and converters are non-linear loads, where their current and voltage relations are not linear. The existence of non-linear loads in electric power system will cause interference, disturbance, overheating and even permanent damage to some sensitive electronic equipment. This research was current harmonic measurement and computation on an induction generator. The measurements were performed using a Clamp On Power Tester and a digital oscilloscope, to view the FFT spectrum. The non-linear loads were using monitor, printer, energy-saving lamps and fluorescent lamp THD measurement results were obtained where the burden voltage was remained on 220 V. On the energy saving and fluorescent lamps, the harmonic range was 0.5%–45% while on the monitor and printer loads, its range was 10%–85%. These ranges showed that the current harmonic contents exceed the standard limit of 15%. [ABSTRACT FROM PUBLISHER]