Heat Selection Tips

CHECK AND ABIDE BY ALL ELECTRICAL SAFETY CODES

Circuits must be derated by 20%>
A SAFETY CODE REQUIREMENT.
Maximum wattage allowed on a circuit is calculated by multiplying the derated amps by the voltage.

Example:
20 amp circuit with 240 volt application

1. 20 amps x 20% = 4 amps
2. 20 amps - 4 amps = 16 amps (max allowed)
   
3. 16 amps x 240 volts = 3,840 watts (max allowed)

1. When connecting a heater to 120-volt dedicated circuits:
• Use a 20-amp single pole circuit breaker
• Use 12/2 with ground wire
• Reference National Electric Code 210.24
2. When connecting a heater to 120-volt existing circuits:
• Reference National Electric Code 210.24
3. When connecting a heater to 240-volt circuits using:

a. 20 amp double pole circuit breaker,

• 3,840 watts is max load allowed on a circuit
• Use 12/2 with ground wire

b. A 30 amp double pole circuit breaker,

• 5,760 watts is max load allowed on a circuit
• Use 10/2 with ground wire c. Reference National Electric Code 210.24