1DV DR Modification of Clause 1 to replace with the following:
This part ofHEC 60079 document specifes requirements for the construction, testing and marking for Group II electrical equipment with type of protection “n” which includes;sealed devices“nC”, hermetically sealed devices “nC”, non-incendive components“nC” and restricted breathing enclosures“nR”intended for use in explosive gas atmospheres.This part of 4EG 60079 document applies to electrical equipment where the rated input voltage does not exceed 15 kV r. m.s. AC or DC including where the internal working voltages of the Ex product exceeds 15 kV, for example starters for HID luminaires.
