For electrical motors, a similar kind of information is conveyed by the "service factor", which is a multiplier that, when applied to the rated output power, gives the power level a motor can sustain for shorter periods of time. The service factor is typically in the 1.15-1.4 range, with the figure being lower for higher-power motors. For every hour of operation at the service-factor-adjusted power rating, a motor loses two to three hours of life at nominal power, i.e. its service life is reduced to less than half for continued operation at this level. The service factor is defined in the ANSI/NEMA MG 1 standard, and is generally used in the United States. There is no IEC standard for the service factor.