Specifies requirements for portable residual current devices (portable rods) (including devices using auxiliary devices and sources with electronic circuitry) for operation on an a.c. supply and having a rated voltage no greater than 250 V a.c. single phase, a rated frequency not over 400 Hz, a rated current not over 16 A and a rated residual operating current not exceeding 30 mA. Coverage includes definitions and symbols, classification, marking and labelling, service conditions, design and construction, and rating. Also includes appendices, tables and diagrams.