|a) for a.c. the peak value of the voltage does not exceed 42,4 V;|
b) for d.c. the voltage does not exceed 60 V
Note 1 to entry: When safety extra low voltage is obtained from the supply mains, it is to be through a safety isolating transformer or a converter with separate windings, the insulation of which complies with double insulation or reinforced insulation requirements.
Note 2 to entry: The voltage limits specified are based on the assumption that the safety isolating transformer is supplied at its rated voltage.
Note 3 to entry: Safety Extra Low Voltage is also known as SELV.