This guide covers general recommendations for the loading of dry-type distribution and power transformers that have 80 ?? 115 ?? and 150 ??average winding rises and insulation systems limited to 150 ?? 180 ?? and 220 ??maximum hottest-spot operating temperatures@ respectively. The guide includes recommendations for ventilated@ nonventilated@ and sealed dry-type transformers having impregnated insulation systems. For more specific recommendations for a particular transformer@ the manufacturer of that transformer should be consulted.