Hubbell Electric Heater Company J manual

			Unit	Branch	Phase-Phase	Min. Feed	Internal	Element	Copper Power	Conduit
kW	Volt	Ph	Amp		Resistance	Breaker or	Power Wire	Jumper			Diagram
				Amp Draw					Feed Wire Size	Size
			Draw		(Ohms)	Fuse Size	Size	Wire Size
	208	1	115.4	38.5	1.8	145	10	12	1/0	1¼"	3A
	208	3	66.6	66.6	3.6	85	8	10	4	1"	13(NT)
24	240	1	100.0	33.3	2.4	130	12	12	1	1¼"	3A
	240	3	57.7	57.7	4.8	75	8	10	4	1"	13(NT)
	480	3	28.9	28.9	19.2	40	12	12	8	½"	13(WT)
	600	3	22.6	22.6	30.6	30	12	12	10	½"	15
	208	1	130.0	43.3	1.6	165	10	12	2/0	1½"	6A
	208	3	74.9	37.5	3.2	95	10	12	3	1"	12(NCB)
27	240	1	112.5	37.5	2.1	145	10	12	1/0	1¼"	3A
	240	3	65.0	65.0	4.3	85	8	10	4	1"	13(NT)
	480	3	32.5	32.5	17.1	45	12	12	8	½"	13(WT)
	600	3	27.2	27.2	25.5	35	12	12	8	½"	15
	208	1	144.2	48.1	1.4	185	8	10	3/0	1½"	6A
	208	3	83.3	41.6	2.9	105	10	12	2	1"	12(NCB)
30	240	1	125.0	41.7	1.9	160	10	12	2/0	1½"	6A
	240	3	72.2	36.1	3.8	95	10	12	3	1"	12(NCB)
	480	3	36.1	36.1	15.4	50	10	12	8	½"	13(WT)
	600	3	29.4	29.4	23.6	40	12	12	8	½"	15
	208	1	173.1	57.7	1.2	220	8	10	4/0	2"	6A
	208	3	99.9	50.0	2.4	125	8	10	1	1¼"	12(NCB)
36	240	1	150.0	50.0	1.6	190	8	10	3/0	1½"	6A
	240	3	86.6	43.3	3.2	110	10	12	2	1"	12(NCB)
	480	3	43.3	43.3	12.8	55	10	12	6	¾"	13(WT)
	600	3	36.2	36.2	19.1	50	10	12	8	½"	15
	208	1	187.5	62.5	1.1	235	8	10	250	2"	6A
	208	3	108.3	54.1	2.2	140	8	10	1/0	1¼"	12(NCB)
39	240	1	162.5	54.2	1.5	205	8	10	4/0	1½"	6A
	240	3	93.8	46.9	3.0	120	10	12	1	1"	12(NCB)
	480	3	46.9	46.9	11.8	60	8	10	6	¾"	13(WT)
	600	3	36.2	36.2	19.1	50	10	12	8	¾"	15
	208	1	195.0	65.0	1.1	245	8	10	250	2"	6A
	208	3	112.6	56.3	2.1	145	8	10	1/0	1¼"	12(NCB)
40.5	240	1	168.8	56.3	1.4	215	8	10	250	1½"	6A
	240	3	97.4	48.7	2.8	125	10	12	1	1"	12(NCB)
	480	3	48.7	48.7	11.4	65	8	10	4	¾"	13(WT)
	600	3	36.2	36.2	19.1	50	10	12	8	¾"	15
	208	3	119.1	59.5	1.9	150	8	10	2/0	1¼"	12(NCB)
45	240	1	187.5	62.5	1.3	235	8	10	250	2"	6A
	240	3	108.3	54.1	2.6	140	8	10	1/0	1¼"	12(NCB)
	480	3	54.1	54.1	10.2	70	8	10	4	¾"	13(WT)
	600	3	42.2	42.2	16.4	55	10	12	6	¾"	15
	208	3	149.9	74.9	1.6	190	6	8	3/0	1½"	12
54	240	3	129.9	65.0	2.1	165	8	10	2/0	1½"	12
	480	3	65.0	65.0	8.5	85	8	10	4	1"	13(WT)
	600	3	54.3	54.3	12.8	70	8	10	4	1"	15
	208	3	159.9	79.9	1.5	200	6	8	4/0	1½"	12
58.5	240	3	140.7	70.4	2.0	180	6	8	2/0	1½"	12
	480	3	70.4	35.2	7.9	90	12	12	3	1"	12(WT)
	600	3	54.3	54.3	12.8	70	8	10	4	1"	15

Notes:

1.Power feed wire sizing is based on using 75°C Cu THHN wire with feeder branch protection rated at 125%.

2.Internal wire sizing is based on using 200°C SEW-2 or PTFE wiring in a raceway with an ambient temperature up to 60°C.

3.For information on 380V, 415V, or 440V models reference the supplied drawing or contact the factory.

4.Normal phase-to-phase resistance tolerance is ±5%.

5.480-volt and 600-volt phase-to-phase resistance values are shown with the transformer disconnected.

6.For 575V models, multiply the kW rating of the 600V model by a de-rating factor of 0.92 to get the actual rating for 575V.

7.For models manufactured prior to June 24, 2005, that utilize wiring diagrams 3, 5, 6, 7(NT), 7(WT), or 11 please contact the factory for wiring diagrams.

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