ELECTRIC HEATER PERFORMANCE DATA
Electric Heater Size 6 kW 8 kW 10 kW 12 kW 15 kW 20 kW
Branch Circuit Number 1 1 1 1 2 1 2 1 2
240 VAC, 60 HZ, 1 PH
BTU 20,439 27,297 34,121 20,473 20,473 17,027 34,121 34,121 34,121
kW 5.99 8.00 10.00 6.00 6.00 4.99 10.00 10.00 10.00
230 VAC, 60 HZ, 1 PH
BTU 18,771 25,070 31,337 18,802 18,802 15,637 31,337 31,337 31,337
kW 5.50 7.35 9.18 5.51 5.51 4.58 9.18 9.18 9.18
220 VAC, 60 HZ, 1 PH
BTU 17,174 22,937 28,671 17,203 17,203 14,307 28,671 28,671 28,671
kW 5.03 6.72 8.40 5.04 5.04 4.19 8.40 8.40 8.40
208 VAC, 60 HZ, 1 PH
BTU 15,352 20,503 25,629 15,377 15,377 12,789 25,629 25,629 25,629
kW 4.50 6.01 7.51 4.51 4.51 3.75 7.51 7.51 7.51
ELECTRIC HEATER AND BLOWER MOTOR ELECTRICAL SPECIFICATIONS
Electric Heater Size - kW 6 kW 8 kW 10 kW 12 kW 15 kW 20 kW
Electric Heater Load - FLA 25.00 33.33 41.67 50.00 62.5 83.34
AWG AWG AWG AWG AWG AWG
Minimum Wires Size (60° C) #8 #8 #8 #6 #6 #6 #4 #4 #4 #4 #4 #4 #3 #3 #3 #1 #1 #1
Minimum Wires Size Size (75° C) #10 #8 #8 #8 #8 #8 #6 #6 #6 #4 #4 #4 #4 #4 #4 #2 #2 #2
Minimum Wires Size (90° C) #10 #10 #10 #8 #8 #8 #6 #6 #6 #6 #6 #6 #4 #4 #4 #3 #3 #3
Ground Wire Size * * * * * * * * * * * * * * * * * *
Furnace Model E30B3 E30B4 E30B5 E30B3 E30B4 E30B5 E30B3 E30B4 E30B5 E30B3 E30B4 E30B5 E30B3 E30B4 E30B5 E30B3 E30B4 E30B5
Indoor Blower FLA 2.40 3.20 4.10 2.40 3.20 4.10 2.40 3.20 4.10 2.40 3.20 4.10 2.40 3.20 4.10 2.40 3.20 4.10
Minimum Circuit Ampacity 35 36 37 45 46 47 56 57 58 66 67 68 82 83 84 108 109 110
Max Overcurrent Protection Amps 35 40 40 45 50 50 60 60 60 70 70 70 90 90 90 110 110 110
ELECTRIC HEATER AND BLOWER MOTOR ELECTRICAL SPECIFICATIONS
Electric Heater Size - kW
12 kW 15 kW 20 kW
FLA kW FLA kW F L A kW
Heater Load Circuit 1 - FLA / kW
25.00 6.00 41.67 10.00 41.67 10.00
Heater Load Circuit 2 - FLA / kW
25.00 6.00 20.83 5.00 41.67 10.00
AWG AWG AWG
Minimum Wire Size (60° C) Circuit 1
#8 #8 #8 #4 #4 #4 #4 #4 #4
Minimum Wire Size (76° C) Circuit 1
#10 #8 #8 #6 #6 #6 #6 #6 #6
Minimum Wire Size (90° C) Circuit 1
#10 #10 #10 #6 #6 #6 #6 #6 #6
Minimum Wire Size (60° C) Circuit 2
#8 #8 #8 #10 #10 #10 #6 #6 #6
Minimum Wire Size (75° C) Circuit 2
#10 #10 #10 #10 #10 #10 #6 #6 #6
Minimum Wire Size (90° C) Circuit 2
#10 #10 #10 #12 #12 #12 #8 #8 #8
Ground Wire Size
* * * * * * * * *
Furnace Model
E30B3 E30B4 E30B5 E30B3 E30B4 E30B5 E30B3 E30B4 E30B5
Indoor Blower FLA (Circuit 1)
2.4 3.2 4.1 2.4 3.2 4.1 2.4 3.2 4.1
Minimum Circuit Ampacity (Circuit 1)
35 36 37 56 57 58 56 57 58
Minimum Circuit Ampacity (Circuit 2)
32 32 32 27 27 27 53 53 53
Max Overcurrent Protection Amps (Circuit 1)
35 40 40 60 60 60 60 60 60
Max Overcurrent Protection Amps (Circuit 2)
35 35 35 30 30 30 60 60 60
Table 6: Wiring Requirements – Single Branch Circuit
6kW, 8kW and 10kW single-stage models can only be wired as a single branch circuit (single power supply).
+ Refer to the National Electrical Code Table 250-95 for non-sheathed conductor ground wire.
* Ground conductor must be the same size and temperature rating as the other conductors listed in Table 6.
Table 7: Wiring Requirements – Dual Branch Circuit
12kW, 15kW and 20kW two-stage models may have a dual or single branch circuit (dual or single power supply).
A jumper bar assembly or jumper wires are used to connect a single power supply to the stage 2 (bottom) circuit breaker.
+ Refer to the National Electrical Code Table 250-95 for Non-Sheathed Conductor Ground Wire.
* Ground conductor must be the same size and temperature rating as the other conductors listed in Table 7.
MORTEX PRODUCTS INC. 501 TERMINAL RD FORT WORTH, TX 76106 Page 12
Table 8: Electric Heat Performance Data
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