DS/EN ISO 13297:2021/A11:2023

This International Standard specifies the requirements for the design, construction and installation of the types of d.c. and a.c. electrical systems described below, either individually or in combination. a) low-voltage alternating current electrical systems which operate at nominal voltages of less than 250 V single phase and extra-low-voltage direct current (d.c.) electrical systems which operate at nominal potentials of 50 V d.c. or less on small craft. b) Single-phase alternating current systems which operate at a nominal voltage not exceeding a.c. 250 V.