diakonos1984
Member
Can anyone tell me why the base level ambient air temperature for LV cables is 30 degrees C (Table 310.16,17) but the base level ambient air temperature for MV cables is 40 degrees C (Table 310.67-76)?
I know there are also 40 degree C tables for LV cables, and I know you can derate either one, but does anyone have a logical explanation for why we have different bases?
:-?
I know there are also 40 degree C tables for LV cables, and I know you can derate either one, but does anyone have a logical explanation for why we have different bases?
:-?