INSULATION CLASSES AND THERMAL RATINGS

Graham 3200 and 8000 Series: Industrial Heavy Duty, Nema Class H, 180 degrees C (356 degrees F) maximum temperature at the hottest spot.

Graham 600 Series: Industry Duty, Nema Class F, 155 degrees C (311 degrees F) maximum temperature at the hottest spot.

Temperatures are total, starting with a maximum ambient temperature of 40 degrees C (104 degrees F).