Test methods specific to filling compounds of electric cables. Drop-point. Separation of oil. Lower temperature brittleness. Total acid number. Absence of corrosive components. Permittivity at temperature 23 C. D.c. resistivity at temperature 23 C and 100 C
Electrical apparatus for explosive gas atmospheres. Part 1-1. Flameproof enclosures 'D'. Method of test for ascertainment of maximum experimental safe gap
