1.1 This recommendation applies to resistors intended for use as laboratory d.c. resistors (hereinafter referred to as "resistors") comprising single or multiple resistors of accuracy Classes 0.0005 ... 0.2 (5 ppM ... 2000 ppM) and single or multi-decade resistors of accuracy Classes 0.0005 ... 5 (5 ppM ... 50 000 ppM). 1.2 This recommendation does not apply to: — resistors which are intended for use solely as permanent mounted circuit components, — resistors used on alternating current or on pulsed currents, — series resistors and shunts which are considered as accessories of electrical measuring instruments in the relevant IEC publications. Note. — Examples are the following publications: Publication 51: Recommendations for Direct Acting Indicating Electrical Measuring Instruments and Their Accessories. Publication 258: Direct Recording Electrical Measuring Instruments and Their Accessories.