EIT Tables 5-20 to 5-33

Cable Ampacity

Tabulated current-carrying capacity of low-voltage copper cables for each EIT installation group. Values are before correction for ambient temperature and grouping.

Installation

Insulation

EIT Table 5-20 — Conduit in air (groups 1 & 2)(70 °C conductor, 40 °C ambient; amperes)

Size (mm²)	G1 · 2c single	G1 · 2c multi	G1 · 3c single	G1 · 3c multi	G2 · 2c single	G2 · 2c multi	G2 · 3c single	G2 · 3c multi
1	10	10	9	9	12	11	10	10
1.5	13	12	12	11	15	14	13	13
2.5	17	16	16	15	21	20	18	17
4	23	22	21	20	28	26	24	23
6	30	28	27	25	36	33	31	30
10	40	37	37	34	50	45	44	40
16	53	50	49	45	66	60	59	54
25	70	65	64	59	88	78	77	70
35	86	80	77	72	109	97	96	86
50	104	96	94	86	131	116	117	103
70	131	121	118	109	167	146	149	130
95	158	145	143	131	202	175	180	156
120	183	167	164	150	234	202	208	179
150	209	191	188	171	261	224	228	196
185	238	216	213	194	297	256	258	222
240	279	253	249	227	348	299	301	258
300	319	291	285	259	398	343	343	295
400	–	–	–	–	475	–	406	–
500	–	–	–	–	545	–	464	–

Apply the ambient and grouping factors from Correction Factors, or let the Cable Sizing calculator do it for you.

Source: EIT 2001-56 (Thai Electrical Code 2013) Tables 5-20 to 5-33. Verify against the edition that governs your project before design use.

Size (mm²)	G1 · 2c single	G1 · 2c multi	G1 · 3c single	G1 · 3c multi	G2 · 2c single	G2 · 2c multi	G2 · 3c single	G2 · 3c multi
1	10	10	9	9	12	11	10	10
1.5	13	12	12	11	15	14	13	13
2.5	17	16	16	15	21	20	18	17
4	23	22	21	20	28	26	24	23
6	30	28	27	25	36	33	31	30
10	40	37	37	34	50	45	44	40
16	53	50	49	45	66	60	59	54
25	70	65	64	59	88	78	77	70
35	86	80	77	72	109	97	96	86
50	104	96	94	86	131	116	117	103
70	131	121	118	109	167	146	149	130
95	158	145	143	131	202	175	180	156
120	183	167	164	150	234	202	208	179
150	209	191	188	171	261	224	228	196
185	238	216	213	194	297	256	258	222
240	279	253	249	227	348	299	301	258
300	319	291	285	259	398	343	343	295
400	–	–	–	–	475	–	406	–
500	–	–	–	–	545	–	464	–

Size (mm²)	G1 · 2c single	G1 · 2c multi	G1 · 3c single	G1 · 3c multi	G2 · 2c single	G2 · 2c multi	G2 · 3c single	G2 · 3c multi
1	10	10	9	9	12	11	10	10
1.5	13	12	12	11	15	14	13	13
2.5	17	16	16	15	21	20	18	17
4	23	22	21	20	28	26	24	23
6	30	28	27	25	36	33	31	30
10	40	37	37	34	50	45	44	40
16	53	50	49	45	66	60	59	54
25	70	65	64	59	88	78	77	70
35	86	80	77	72	109	97	96	86
50	104	96	94	86	131	116	117	103
70	131	121	118	109	167	146	149	130
95	158	145	143	131	202	175	180	156
120	183	167	164	150	234	202	208	179
150	209	191	188	171	261	224	228	196
185	238	216	213	194	297	256	258	222
240	279	253	249	227	348	299	301	258
300	319	291	285	259	398	343	343	295
400	–	–	–	–	475	–	406	–
500	–	–	–	–	545	–	464	–

Size (mm²)	G1 · 2c single	G1 · 2c multi	G1 · 3c single	G1 · 3c multi	G2 · 2c single	G2 · 2c multi	G2 · 3c single	G2 · 3c multi
1	10	10	9	9	12	11	10	10
1.5	13	12	12	11	15	14	13	13
2.5	17	16	16	15	21	20	18	17
4	23	22	21	20	28	26	24	23
6	30	28	27	25	36	33	31	30
10	40	37	37	34	50	45	44	40
16	53	50	49	45	66	60	59	54
25	70	65	64	59	88	78	77	70
35	86	80	77	72	109	97	96	86
50	104	96	94	86	131	116	117	103
70	131	121	118	109	167	146	149	130
95	158	145	143	131	202	175	180	156
120	183	167	164	150	234	202	208	179
150	209	191	188	171	261	224	228	196
185	238	216	213	194	297	256	258	222
240	279	253	249	227	348	299	301	258
300	319	291	285	259	398	343	343	295
400	–	–	–	–	475	–	406	–
500	–	–	–	–	545	–	464	–