Nordyne E3 user service a. Electrical Specifications, for Dual Circuit Installations

Model			Maximum	Minimum	Copper Wire Size - See		Ground	Low
	Supply	Total			Caution Below			Voltage
Number			Over-current	Circuit			Wire
	Circuit	Amperes			60°C	90°C		Thermostat
E3E(*)			Rating	Ampacity			Size
					(e.g., Romex)	(e.g., SEU)		Wire Size
-010H	Single	45.5	60	57	4	6	10	2-Wire system
	Single	52.1	70	65	4	6	8
-012H								maximum wire
	Dual "A"	28.0	40	35	8	8	10
								lengths:
	Dual "B"	24.2	30	30	10	10	10
								24 Ga.= 55'
	Single	66.3	90	83	2	4	8
-015H								22 Ga.= 90'
	Dual "A"	45.5	60	56	4	6	10
								20 Ga.= 140'
	Dual "B"	20.8	30	26	10	10	10
								18 Ga.= 225'
-017H	Single	71.3	90	89	2	4	8
	Dual "A"	48.8	60	60	4	6	10	4 or more
	Dual "B"	22.5	30	28	10	10	10	Wire systems
-020H	Single	87.1	125	109	0	2	6	maximum wire
	Dual "A"	45.5	60	57	4	6	10	lengths:
	Dual "B"	41.7	60	52	4	6	10	24 Ga.= 25'
	Single	93.8	125	117	0	2	6	22 Ga.= 45'
-023H	Dual "A"	52.1	60	60	4	6	10	20 Ga.= 70'
	Dual "B"	41.7	60	56	4	6	10	18 Ga= 110'
Model			Maximum	Minimum	Copper Wire Size - See		Ground	Low
	Supply	Total			Caution Below			Voltage
Number			Over-current	Circuit			Wire
	Circuit	Amperes			60°C	90°C		Thermostat
E3EX			Rating	Ampacity			Size
					(e.g., Romex)	(e.g., SEU)		Wire Size
-010	Single	47.7	60	57	4	6	10	2-Wire system
-012	Single	54.3	70	67	4	6	8	maximum wire
	Dual "A"	30.2	40	35	8	8	10	lengths:
	Dual "B"	24.2	30	30	10	10	10	24 Ga.= 55'
	Single	66.0	90	83	2	4	8	22 Ga.= 90'
-015	Dual "A"	46.0	60	57	4	6	10	20 Ga.= 140'
	Dual "B"	20.0	30	25	10	10	10	18 Ga.= 225'
-017	Single	71.5	90	89	2	4	8	4 or more
	Dual "A"	51.0	60	60	4	6	10	Wire systems
	Dual "B"	22.5	30	28	10	10	10	maximum wire
-020	Single	86.0	125	109	0	2	6	lengths:
	Dual "A"	46.0	60	57	4	6	10	24 Ga.= 25'
	Dual "B"	40.0	60	50	4	6	10	22 Ga.= 45'
Replacement furnace for E2E(*)-015HB
E2E(*)-	Single	67.1	90	83	2	4	8	Replacement
	Dual "A"	35.5	50	44	6	8	10	furnace for
015HBR
	Dual "B"	31.7	40	39	8	8	10	E2E(*)-015HB

* Can be H or B

CAUTION: When sizing the wire, you must follow the guidelines of the latest revision of the NEC. NM-B wire is equivalent to “Romex” cable. SEU is equivalent to service entry cable. For NEC type NM-B wire, you must size the wire using 60C ratings per NEC article 326.

* Minimum overcurrent protection per NEC 424-3b not to be less than 125% of total amps for fi xed resistance heat.

Table 9a. Electrical Specifications

	Circuit "A"		Circuit "B"
Model Number	Wire Gauge	Breaker	Wire Gauge	Breaker
E3E(*)	and Type	Size	and Type	Size
-012H	#8 NM-B	40 amp	#10 NM-B	30 amp
-015H	#6 SEU	60 amp	#10 NM-B	30 amp
-017H	#6 SEU	60 amp	#10 NM-B	30 amp
-020H	#6 SEU	60 amp	#6 SEU	60 amp
-023H	#6 SEU	60 amp	#6 SEU	60 amp
Replacement furnace for E2E(*)-015HB
E2E(*)-015HBR	#8 SEU	50 amp	#8 NM-B	40 amp

Table 9b. Recommended Electrical Application Guide

for Dual Circuit Installations**

**Alternate wiring combinations can be used. Refer to the latest revision of the NEC for these appropriate alternate combinations.

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