Hazardous Area Heating and Controls
Technical information
- Imperial / Metric Conversion Table
- Percentage Rated Wattage for Various Applied Voltages
- Calculate Volts, Amps, Watts & Ohms
- Element Operating Temperatures in Air
- Thermal Properties of Solids
- Thermal Properties of Liquids
- Heating Load Requirement Graphs for Air
- Heating Load Requirement Graphs for Water
- Typical Watts Densities
- Enclosure Duty Calculator
Percentage Rated Wattage for Various Applied Voltages
Percentage Rated Wattage For Various Applied Voltages:Heating elements are frequently used at voltages other than those shown in our catalogue. The percentages in this table are used to determine the resulting wattage.
| Applied Voltage | Rated Voltage | |||||||||||||
| 110 | 115 | 120 | 208 | 220 | 230 | 240 | 277 | 380 | 415 | 440 | 460 | 480 | 550 | |
| 110 | 100% | 91% | 84% | 28% | 25% | 23% | 21% | 16% | 8.4% | 7% | 6.2% | 5.7% | 5.2% | 4% |
| 115 | 109% | 100% | 92% | 31% | 27% | 25% | 23% | 17% | 9.0% | 7.6% | 6.7% | 6.2% | 5.7% | 4.3% |
| 120 | 119% | 109% | 100% | 33% | 30% | 27% | 25% | 19% | 10% | 8.4% | 7.4% | 6.8% | 6.3% | 4.8% |
| 208 | 100% | 89% | 82% | 75% | 56% | 30% | 25% | 22% | 20% | 19% | 14% | |||
| 220 | 112% | 100% | 91% | 84% | 63% | 34% | 28% | 25% | 23% | 21% | 16% | |||
| 230 | 109% | 100% | 92% | 69% | 37% | 31% | 27% | 25% | 23% | 17% | ||||
| 240 | 119% | 109% | 100% | 75% | 40% | 33% | 30% | 27% | 25% | 19% | ||||
| 277 | 100% | 53% | 45% | 40% | 36% | 33% | 25% | |||||||
| 380 | 100% | 84% | 74% | 68% | 63% | 47% | ||||||||
| 415 | 119% | 100% | 89% | 81% | 75% | 57% | ||||||||
| 440 | 112% | 100% | 91% | 84% | 64% | |||||||||
| 460 | 109% | 100% | 92% | 70% | ||||||||||
| 480 | Actual Wattage = Rated Wattage x (Applied Voltage)²/(Rated Voltage)² | 119% | 109% | 100% | 76% | |||||||||
| 550 | 100% | |||||||||||||
