This Japanese Industrial Standard specifies mounting rails for such electrical devices as relays, contractors, switches and industrial terminal blocks to be used at voltages not exceeding 1000 V a.c. or 1500 V d.c.. The rails dealt with here are mainly used for mechanical support of electrical devices inside switchgear, controlgear, etc., and are not applicable to the use intended for current carrying.

IEC 60715 Ed. 1.0 - Equivalent