Conduit Fill Table

Wire size (THWN, THHN) conductor size AWG/kcmil. Select a trade size to compare EMT, IMC and GRC.

1/2" Trade size

Wire size	EMT	IMC	GRC
14	12	14	13
12	9	10	9
10	5	6	6
8	3	3	3
6	2	2	2
4	1	1	1
3	1	1	1
2	1	1	1
1	1	1	1
1/0	1	1	1
2/0		1
3/0
4/0
250
300
350
400
500
600
700
750

3/4" Trade size

Wire size	EMT	IMC	GRC
14	22	24	22
12	16	17	16
10	10	11	10
8	6	6	6
6	4	4	4
4	2	3	2
3	1	2	1
2	1	1	1
1	1	1	1
1/0	1	1	1
2/0	1	1	1
3/0	1	1	1
4/0	1	1	1
250
300
350
400
500
600
700
750

1" Trade size

Wire size	EMT	IMC	GRC
14	35	39	36
12	26	29	26
10	16	18	17
8	9	10	9
6	7	7	7
4	4	4	4
3	3	4	3
2	3	3	3
1	1	2	1
1/0	1	1	1
2/0	1	1	1
3/0	1	1	1
4/0	1	1	1
250	1	1	1
300	1	1	1
350	1	1	1
400		1	1
500
600
700
750

1 1/4" Trade size

Wire size	EMT	IMC	GRC
14	61	68	63
12	45	49	46
10	28	31	29
8	16	18	16
6	12	13	12
4	7	8	7
3	6	6	6
2	5	5	5
1	4	4	4
1/0	3	3	3
2/0	2	2	2
3/0	1	1	1
4/0	1	1	1
250	1	1	1
300	1	1	1
350	1	1	1
400	1	1	1
500	1	1	1
600	1	1	1
700	1	1	1
750		1

1 1/2" Trade size

Wire size	EMT	IMC	GRC
14	84	91	85
12	61	67	62
10	38	42	39
8	22	24	22
6	16	17	16
4	10	10	10
3	8	9	8
2	7	7	7
1	5	5	5
1/0	4	4	4
2/0	3	4	3
3/0	2	3	3
4/0	1	3	2
250	1	2	1
300	1	1	1
350	1	1	1
400	1	1	1
500	1	1	1
600	1	1	1
700	1	1	1
750	1	1	1

2" Trade size

Wire size	EMT	IMC	GRC
14	138	149	140
12	101	109	102
10	63	68	64
8	36	39	37
6	26	38	27
4	16	17	16
3	13	15	14
2	11	12	11
1	8	9	8
1/0	7	8	7
2/0	6	6	6
3/0	5	5	5
4/0	4	4	4
250	3	3	3
300	2	3	3
350	1	2	2
400	1	2	2
500	1	1	1
600	1	1	1
700	1	1	1
750	1	1	1

2 1/2" Trade size

Wire size	EMT	IMC	GRC
14	241	211	200
12	176	154	146
10	111	97	92
8	64	56	53
6	46	40	38
4	28	25	23
3	24	21	20
2	20	17	17
1	15	13	12
1/0	12	11	10
2/0	10	9	8
3/0	8	7	7
4/0	7	6	6
250	6	5	5
300	5	4	4
350	4	4	3
400	4	3	3
500	3	3	2
600	2	2	1
700	2	1	1
750	1	1	1

3" Trade size

Wire size	EMT	IMC	GRC
14	364	362	309
12	266	238	225
10	167	150	142
8	96	86	82
6	69	62	59
4	43	38	36
3	36	32	31
2	30	27	26
1	22	20	19
1/0	19	17	16
2/0	16	14	13
3/0	13	12	11
4/0	11	9	9
250	9	8	7
300	7	7	6
350	6	6	5
400	6	5	5
500	5	4	4
600	4	3	3
700	3	3	3
750	3	3	3

3 1/2" Trade size

Wire size	EMT	IMC	GRC
14	476	436	412
12	347	318	301
10	219	200	189
8	126	115	109
6	91	83	79
4	56	51	48
3	47	43	41
2	40	36	34
1	29	27	25
1/0	25	23	21
2/0	20	19	18
3/0	17	16	15
4/0	14	13	12
250	11	10	10
300	10	9	8
350	9	8	7
400	8	7	7
500	6	6	5
600	5	5	4
700	4	4	4
750	4	4	4

4" Trade size

Wire size	EMT	IMC	GRC
14	608	562	531
12	443	410	387
10	279	258	244
8	161	149	140
6	116	107	101
4	71	66	62
3	60	56	53
2	51	47	44
1	37	35	33
1/0	32	29	27
2/0	26	24	23
3/0	22	20	19
4/0	18	17	16
250	15	13	13
300	13	12	11
350	11	10	10
400	10	9	8
500	8	7	7
600	7	6	6
700	6	5	5
750	5	5	5

Above information referenced from tables C1, C4, and C8 of the 1996 NEC.

Trade Size		Wire Size (THWN, THHN) Conductor Size AWG/kcmil
Trade Size		14	12	10	8	6	4	3	2	1	1/0	2/0	3/0	4/0	250	300	350	400	500	600	700	750
1/2	EMT	12	9	5	3	2	1	1	1	1	1
	IMC	14	10	6	3	2	1	1	1	1	1	1
	GRC	13	9	6	3	2	1	1	1	1	1
3/4	EMT	22	16	10	6	4	2	1	1	1	1	1	1	1
	IMC	24	17	11	6	4	3	2	1	1	1	1	1	1
	GRC	22	16	10	6	4	2	1	1	1	1	1	1	1
1	EMT	35	26	16	9	7	4	3	3	1	1	1	1	1	1	1	1
	IMC	39	29	18	10	7	4	4	3	2	1	1	1	1	1	1	1	1
	GRC	36	26	17	9	7	4	3	3	1	1	1	1	1	1	1	1	1
1 1/4	EMT	61	45	28	16	12	7	6	5	4	3	2	1	1	1	1	1	1	1	1	1
	IMC	68	49	31	18	13	8	6	5	4	3	2	1	1	1	1	1	1	1	1	1	1
	GRC	63	46	29	16	12	7	6	5	4	3	2	1	1	1	1	1	1	1	1	1
1 1/2	EMT	84	61	38	22	16	10	8	7	5	4	3	2	1	1	1	1	1	1	1	1	1
	IMC	91	67	42	24	17	10	9	7	5	4	4	3	3	2	1	1	1	1	1	1	1
	GRC	85	62	39	22	16	10	8	7	5	4	3	3	2	1	1	1	1	1	1	1	1
2	EMT	138	101	63	36	26	16	13	11	8	7	6	5	4	3	2	1	1	1	1	1	1
	IMC	149	109	68	39	38	17	15	12	9	8	6	5	4	3	3	2	2	1	1	1	1
	GRC	140	102	64	37	27	16	14	11	8	7	6	5	4	3	3	2	2	1	1	1	1
2 1/2	EMT	241	176	111	64	46	28	24	20	15	12	10	8	7	6	5	4	4	3	2	2	1
	IMC	211	154	97	56	40	25	21	17	13	11	9	7	6	5	4	4	3	3	2	1	1
	GRC	200	146	92	53	38	23	20	17	12	10	8	7	6	5	4	3	3	2	1	1	1
3	EMT	364	266	167	96	69	43	36	30	22	19	16	13	11	9	7	6	6	5	4	3	3
	IMC	362	238	150	86	62	38	32	27	20	17	14	12	9	8	7	6	5	4	3	3	3
	GRC	309	225	142	82	59	36	31	26	19	16	13	11	9	7	6	5	5	4	3	3	3
3 1/2	EMT	476	347	219	126	91	56	47	40	29	25	20	17	14	11	10	9	8	6	5	4	4
	IMC	436	318	200	115	83	51	43	36	27	23	19	16	13	10	9	8	7	6	5	4	4
	GRC	412	301	189	109	79	48	41	34	25	21	18	15	12	10	8	7	7	5	4	4	4
4	EMT	608	443	279	161	116	71	60	51	37	32	26	22	18	15	13	11	10	8	7	6	5
	IMC	562	410	258	149	107	66	56	47	35	29	24	20	17	13	12	10	9	7	6	5	5
	GRC	531	387	244	140	101	62	53	44	33	27	23	19	16	13	11	10	8	7	6	5	5

Above information referenced from tables C1, C4, and C8 of the 1996 NEC.

Wire size	EMT	IMC	GRC
14	12	14	13
12	9	10	9
10	5	6	6
8	3	3	3
6	2	2	2
4	1	1	1
3	1	1	1
2	1	1	1
1	1	1	1
1/0	1	1	1
2/0		1
3/0
4/0
250
300
350
400
500
600
700
750

Wire size	EMT	IMC	GRC
14	22	24	22
12	16	17	16
10	10	11	10
8	6	6	6
6	4	4	4
4	2	3	2
3	1	2	1
2	1	1	1
1	1	1	1
1/0	1	1	1
2/0	1	1	1
3/0	1	1	1
4/0	1	1	1
250
300
350
400
500
600
700
750

Wire size	EMT	IMC	GRC
14	35	39	36
12	26	29	26
10	16	18	17
8	9	10	9
6	7	7	7
4	4	4	4
3	3	4	3
2	3	3	3
1	1	2	1
1/0	1	1	1
2/0	1	1	1
3/0	1	1	1
4/0	1	1	1
250	1	1	1
300	1	1	1
350	1	1	1
400		1	1
500
600
700
750

Wire size	EMT	IMC	GRC
14	61	68	63
12	45	49	46
10	28	31	29
8	16	18	16
6	12	13	12
4	7	8	7
3	6	6	6
2	5	5	5
1	4	4	4
1/0	3	3	3
2/0	2	2	2
3/0	1	1	1
4/0	1	1	1
250	1	1	1
300	1	1	1
350	1	1	1
400	1	1	1
500	1	1	1
600	1	1	1
700	1	1	1
750		1

Wire size	EMT	IMC	GRC
14	84	91	85
12	61	67	62
10	38	42	39
8	22	24	22
6	16	17	16
4	10	10	10
3	8	9	8
2	7	7	7
1	5	5	5
1/0	4	4	4
2/0	3	4	3
3/0	2	3	3
4/0	1	3	2
250	1	2	1
300	1	1	1
350	1	1	1
400	1	1	1
500	1	1	1
600	1	1	1
700	1	1	1
750	1	1	1

Wire size	EMT	IMC	GRC
14	138	149	140
12	101	109	102
10	63	68	64
8	36	39	37
6	26	38	27
4	16	17	16
3	13	15	14
2	11	12	11
1	8	9	8
1/0	7	8	7
2/0	6	6	6
3/0	5	5	5
4/0	4	4	4
250	3	3	3
300	2	3	3
350	1	2	2
400	1	2	2
500	1	1	1
600	1	1	1
700	1	1	1
750	1	1	1

Wire size	EMT	IMC	GRC
14	241	211	200
12	176	154	146
10	111	97	92
8	64	56	53
6	46	40	38
4	28	25	23
3	24	21	20
2	20	17	17
1	15	13	12
1/0	12	11	10
2/0	10	9	8
3/0	8	7	7
4/0	7	6	6
250	6	5	5
300	5	4	4
350	4	4	3
400	4	3	3
500	3	3	2
600	2	2	1
700	2	1	1
750	1	1	1

Wire size	EMT	IMC	GRC
14	364	362	309
12	266	238	225
10	167	150	142
8	96	86	82
6	69	62	59
4	43	38	36
3	36	32	31
2	30	27	26
1	22	20	19
1/0	19	17	16
2/0	16	14	13
3/0	13	12	11
4/0	11	9	9
250	9	8	7
300	7	7	6
350	6	6	5
400	6	5	5
500	5	4	4
600	4	3	3
700	3	3	3
750	3	3	3

Wire size	EMT	IMC	GRC
14	476	436	412
12	347	318	301
10	219	200	189
8	126	115	109
6	91	83	79
4	56	51	48
3	47	43	41
2	40	36	34
1	29	27	25
1/0	25	23	21
2/0	20	19	18
3/0	17	16	15
4/0	14	13	12
250	11	10	10
300	10	9	8
350	9	8	7
400	8	7	7
500	6	6	5
600	5	5	4
700	4	4	4
750	4	4	4

Wire size	EMT	IMC	GRC
14	608	562	531
12	443	410	387
10	279	258	244
8	161	149	140
6	116	107	101
4	71	66	62
3	60	56	53
2	51	47	44
1	37	35	33
1/0	32	29	27
2/0	26	24	23
3/0	22	20	19
4/0	18	17	16
250	15	13	13
300	13	12	11
350	11	10	10
400	10	9	8
500	8	7	7
600	7	6	6
700	6	5	5
750	5	5	5

Wire size	EMT	IMC	GRC
14	12	14	13
12	9	10	9
10	5	6	6
8	3	3	3
6	2	2	2
4	1	1	1
3	1	1	1
2	1	1	1
1	1	1	1
1/0	1	1	1
2/0		1
3/0
4/0
250
300
350
400
500
600
700
750

Wire size	EMT	IMC	GRC
14	22	24	22
12	16	17	16
10	10	11	10
8	6	6	6
6	4	4	4
4	2	3	2
3	1	2	1
2	1	1	1
1	1	1	1
1/0	1	1	1
2/0	1	1	1
3/0	1	1	1
4/0	1	1	1
250
300
350
400
500
600
700
750

Wire size	EMT	IMC	GRC
14	35	39	36
12	26	29	26
10	16	18	17
8	9	10	9
6	7	7	7
4	4	4	4
3	3	4	3
2	3	3	3
1	1	2	1
1/0	1	1	1
2/0	1	1	1
3/0	1	1	1
4/0	1	1	1
250	1	1	1
300	1	1	1
350	1	1	1
400		1	1
500
600
700
750

Wire size	EMT	IMC	GRC
14	61	68	63
12	45	49	46
10	28	31	29
8	16	18	16
6	12	13	12
4	7	8	7
3	6	6	6
2	5	5	5
1	4	4	4
1/0	3	3	3
2/0	2	2	2
3/0	1	1	1
4/0	1	1	1
250	1	1	1
300	1	1	1
350	1	1	1
400	1	1	1
500	1	1	1
600	1	1	1
700	1	1	1
750		1

Wire size	EMT	IMC	GRC
14	84	91	85
12	61	67	62
10	38	42	39
8	22	24	22
6	16	17	16
4	10	10	10
3	8	9	8
2	7	7	7
1	5	5	5
1/0	4	4	4
2/0	3	4	3
3/0	2	3	3
4/0	1	3	2
250	1	2	1
300	1	1	1
350	1	1	1
400	1	1	1
500	1	1	1
600	1	1	1
700	1	1	1
750	1	1	1

Wire size	EMT	IMC	GRC
14	138	149	140
12	101	109	102
10	63	68	64
8	36	39	37
6	26	38	27
4	16	17	16
3	13	15	14
2	11	12	11
1	8	9	8
1/0	7	8	7
2/0	6	6	6
3/0	5	5	5
4/0	4	4	4
250	3	3	3
300	2	3	3
350	1	2	2
400	1	2	2
500	1	1	1
600	1	1	1
700	1	1	1
750	1	1	1

Wire size	EMT	IMC	GRC
14	241	211	200
12	176	154	146
10	111	97	92
8	64	56	53
6	46	40	38
4	28	25	23
3	24	21	20
2	20	17	17
1	15	13	12
1/0	12	11	10
2/0	10	9	8
3/0	8	7	7
4/0	7	6	6
250	6	5	5
300	5	4	4
350	4	4	3
400	4	3	3
500	3	3	2
600	2	2	1
700	2	1	1
750	1	1	1

Wire size	EMT	IMC	GRC
14	364	362	309
12	266	238	225
10	167	150	142
8	96	86	82
6	69	62	59
4	43	38	36
3	36	32	31
2	30	27	26
1	22	20	19
1/0	19	17	16
2/0	16	14	13
3/0	13	12	11
4/0	11	9	9
250	9	8	7
300	7	7	6
350	6	6	5
400	6	5	5
500	5	4	4
600	4	3	3
700	3	3	3
750	3	3	3

Wire size	EMT	IMC	GRC
14	476	436	412
12	347	318	301
10	219	200	189
8	126	115	109
6	91	83	79
4	56	51	48
3	47	43	41
2	40	36	34
1	29	27	25
1/0	25	23	21
2/0	20	19	18
3/0	17	16	15
4/0	14	13	12
250	11	10	10
300	10	9	8
350	9	8	7
400	8	7	7
500	6	6	5
600	5	5	4
700	4	4	4
750	4	4	4

Wire size	EMT	IMC	GRC
14	608	562	531
12	443	410	387
10	279	258	244
8	161	149	140
6	116	107	101
4	71	66	62
3	60	56	53
2	51	47	44
1	37	35	33
1/0	32	29	27
2/0	26	24	23
3/0	22	20	19
4/0	18	17	16
250	15	13	13
300	13	12	11
350	11	10	10
400	10	9	8
500	8	7	7
600	7	6	6
700	6	5	5
750	5	5	5

Wire size	EMT	IMC	GRC
14	12	14	13
12	9	10	9
10	5	6	6
8	3	3	3
6	2	2	2
4	1	1	1
3	1	1	1
2	1	1	1
1	1	1	1
1/0	1	1	1
2/0		1
3/0
4/0
250
300
350
400
500
600
700
750

Wire size	EMT	IMC	GRC
14	22	24	22
12	16	17	16
10	10	11	10
8	6	6	6
6	4	4	4
4	2	3	2
3	1	2	1
2	1	1	1
1	1	1	1
1/0	1	1	1
2/0	1	1	1
3/0	1	1	1
4/0	1	1	1
250
300
350
400
500
600
700
750

Wire size	EMT	IMC	GRC
14	35	39	36
12	26	29	26
10	16	18	17
8	9	10	9
6	7	7	7
4	4	4	4
3	3	4	3
2	3	3	3
1	1	2	1
1/0	1	1	1
2/0	1	1	1
3/0	1	1	1
4/0	1	1	1
250	1	1	1
300	1	1	1
350	1	1	1
400		1	1
500
600
700
750

Wire size	EMT	IMC	GRC
14	61	68	63
12	45	49	46
10	28	31	29
8	16	18	16
6	12	13	12
4	7	8	7
3	6	6	6
2	5	5	5
1	4	4	4
1/0	3	3	3
2/0	2	2	2
3/0	1	1	1
4/0	1	1	1
250	1	1	1
300	1	1	1
350	1	1	1
400	1	1	1
500	1	1	1
600	1	1	1
700	1	1	1
750		1

Wire size	EMT	IMC	GRC
14	84	91	85
12	61	67	62
10	38	42	39
8	22	24	22
6	16	17	16
4	10	10	10
3	8	9	8
2	7	7	7
1	5	5	5
1/0	4	4	4
2/0	3	4	3
3/0	2	3	3
4/0	1	3	2
250	1	2	1
300	1	1	1
350	1	1	1
400	1	1	1
500	1	1	1
600	1	1	1
700	1	1	1
750	1	1	1

Wire size	EMT	IMC	GRC
14	138	149	140
12	101	109	102
10	63	68	64
8	36	39	37
6	26	38	27
4	16	17	16
3	13	15	14
2	11	12	11
1	8	9	8
1/0	7	8	7
2/0	6	6	6
3/0	5	5	5
4/0	4	4	4
250	3	3	3
300	2	3	3
350	1	2	2
400	1	2	2
500	1	1	1
600	1	1	1
700	1	1	1
750	1	1	1

Wire size	EMT	IMC	GRC
14	241	211	200
12	176	154	146
10	111	97	92
8	64	56	53
6	46	40	38
4	28	25	23
3	24	21	20
2	20	17	17
1	15	13	12
1/0	12	11	10
2/0	10	9	8
3/0	8	7	7
4/0	7	6	6
250	6	5	5
300	5	4	4
350	4	4	3
400	4	3	3
500	3	3	2
600	2	2	1
700	2	1	1
750	1	1	1

Wire size	EMT	IMC	GRC
14	364	362	309
12	266	238	225
10	167	150	142
8	96	86	82
6	69	62	59
4	43	38	36
3	36	32	31
2	30	27	26
1	22	20	19
1/0	19	17	16
2/0	16	14	13
3/0	13	12	11
4/0	11	9	9
250	9	8	7
300	7	7	6
350	6	6	5
400	6	5	5
500	5	4	4
600	4	3	3
700	3	3	3
750	3	3	3

Wire size	EMT	IMC	GRC
14	476	436	412
12	347	318	301
10	219	200	189
8	126	115	109
6	91	83	79
4	56	51	48
3	47	43	41
2	40	36	34
1	29	27	25
1/0	25	23	21
2/0	20	19	18
3/0	17	16	15
4/0	14	13	12
250	11	10	10
300	10	9	8
350	9	8	7
400	8	7	7
500	6	6	5
600	5	5	4
700	4	4	4
750	4	4	4

Wire size	EMT	IMC	GRC
14	608	562	531
12	443	410	387
10	279	258	244
8	161	149	140
6	116	107	101
4	71	66	62
3	60	56	53
2	51	47	44
1	37	35	33
1/0	32	29	27
2/0	26	24	23
3/0	22	20	19
4/0	18	17	16
250	15	13	13
300	13	12	11
350	11	10	10
400	10	9	8
500	8	7	7
600	7	6	6
700	6	5	5
750	5	5	5