AS/NZS 3008.1.1:2025

Table 3.12

Current ratings, single‑core cable, three cables per circuit, thermoplastic 75 °C

On the 2025 edition, the cable size tool reads this table for single‑core thermoplastic cable on a three‑phase circuit. It gives the printed rating in copper or aluminium for each installation method.

Verified: read against the printed standard, pages 36–37. Checked 27 Sept 2026.

Units: Rating A

These are the values AmpSize encodes. No text of the standard is reproduced. Verify against the current standard.

Back to its card on the AS/NZS 3008.1.1:2025 page

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20 rows

Table 3.12, Current ratings, single-core cable, three cables per circuit, thermoplastic 75 °C
Size	Cu spaced apart	Cu spaced from surface	Cu touching	Cu sun	Cu enclosed air	Cu insulation partial	Cu insulation complete	Cu buried direct	Cu underground one enclosure	Cu underground separate enclosures	Al spaced apart	Al spaced from surface	Al touching	Al sun	Al enclosed air	Al insulation partial	Al insulation complete	Al buried direct	Al underground one enclosure	Al underground separate enclosures
1	16	14	13	8	12	10	6	21	16	19	—	—	—	—	—	—	—	—	—	—
1.5	20	17	16	10	15	12	8	27	20	24	—	—	—	—	—	—	—	—	—	—
2.5	29	25	23	13	21	17	12	37	27	33	—	—	—	—	—	—	—	—	—	—
4	38	33	31	18	28	23	16	49	36	43	—	—	—	—	—	—	—	—	—	—
6	49	42	40	22	35	28	20	61	45	53	—	—	—	—	—	—	—	—	—	—
10	67	58	54	30	47	37	27	81	59	70	—	—	—	—	—	—	—	—	—	—
16	89	77	72	39	62	50	36	104	78	90	69	59	56	30	48	39	28	81	60	70
25	120	103	97	50	81	64	48	134	100	117	93	80	75	39	63	50	38	104	78	91
35	148	127	119	61	100	80	59	160	122	140	115	98	92	47	78	62	46	124	94	108
50	181	156	146	72	119	95	—	190	144	168	141	121	113	56	92	74	—	147	112	131
70	230	197	184	89	152	122	—	233	180	205	179	153	143	69	118	94	—	181	140	159
95	287	246	230	107	183	147	—	279	217	250	222	191	178	83	142	114	—	216	168	194
120	335	287	267	122	217	173	—	317	252	283	260	223	208	95	169	135	—	247	196	220
150	385	330	308	137	244	195	—	356	283	317	298	256	239	106	190	152	—	276	220	246
185	447	383	357	154	284	227	—	402	325	365	347	299	278	120	222	177	—	313	253	284
240	535	457	426	176	331	265	—	465	377	422	417	358	334	138	259	207	—	364	295	329
300	620	529	492	197	388	311	—	524	434	488	483	415	387	155	305	244	—	412	341	380
400	726	615	573	219	442	353	—	593	492	553	570	488	455	175	351	281	—	471	391	434
500	846	710	661	242	523	418	—	668	571	641	669	571	532	196	421	337	—	537	459	507
630	990	817	760	265	588	471	—	748	639	723	789	668	622	219	481	385	—	612	523	578

Cables

Protection

Loads

Power

Solar

Safety

Earthing

Testing

Fire

Regulatory

Table 3.12

Tools that read it (2)

Size	Cu spaced apart	Cu spaced from surface	Cu touching	Cu sun	Cu enclosed air	Cu insulation partial	Cu insulation complete	Cu buried direct	Cu underground one enclosure	Cu underground separate enclosures	Al spaced apart	Al spaced from surface	Al touching	Al sun	Al enclosed air	Al insulation partial	Al insulation complete	Al buried direct	Al underground one enclosure	Al underground separate enclosures
1	16	14	13	8	12	10	6	21	16	19	—	—	—	—	—	—	—	—	—	—
1.5	20	17	16	10	15	12	8	27	20	24	—	—	—	—	—	—	—	—	—	—
2.5	29	25	23	13	21	17	12	37	27	33	—	—	—	—	—	—	—	—	—	—
4	38	33	31	18	28	23	16	49	36	43	—	—	—	—	—	—	—	—	—	—
6	49	42	40	22	35	28	20	61	45	53	—	—	—	—	—	—	—	—	—	—
10	67	58	54	30	47	37	27	81	59	70	—	—	—	—	—	—	—	—	—	—
16	89	77	72	39	62	50	36	104	78	90	69	59	56	30	48	39	28	81	60	70
25	120	103	97	50	81	64	48	134	100	117	93	80	75	39	63	50	38	104	78	91
35	148	127	119	61	100	80	59	160	122	140	115	98	92	47	78	62	46	124	94	108
50	181	156	146	72	119	95	—	190	144	168	141	121	113	56	92	74	—	147	112	131
70	230	197	184	89	152	122	—	233	180	205	179	153	143	69	118	94	—	181	140	159
95	287	246	230	107	183	147	—	279	217	250	222	191	178	83	142	114	—	216	168	194
120	335	287	267	122	217	173	—	317	252	283	260	223	208	95	169	135	—	247	196	220
150	385	330	308	137	244	195	—	356	283	317	298	256	239	106	190	152	—	276	220	246
185	447	383	357	154	284	227	—	402	325	365	347	299	278	120	222	177	—	313	253	284
240	535	457	426	176	331	265	—	465	377	422	417	358	334	138	259	207	—	364	295	329
300	620	529	492	197	388	311	—	524	434	488	483	415	387	155	305	244	—	412	341	380
400	726	615	573	219	442	353	—	593	492	553	570	488	455	175	351	281	—	471	391	434
500	846	710	661	242	523	418	—	668	571	641	669	571	532	196	421	337	—	537	459	507
630	990	817	760	265	588	471	—	748	639	723	789	668	622	219	481	385	—	612	523	578

Size	Cu spaced apart	Cu spaced from surface	Cu touching	Cu sun	Cu enclosed air	Cu insulation partial	Cu insulation complete	Cu buried direct	Cu underground one enclosure	Cu underground separate enclosures	Al spaced apart	Al spaced from surface	Al touching	Al sun	Al enclosed air	Al insulation partial	Al insulation complete	Al buried direct	Al underground one enclosure	Al underground separate enclosures
1	16	14	13	8	12	10	6	21	16	19	—	—	—	—	—	—	—	—	—	—
1.5	20	17	16	10	15	12	8	27	20	24	—	—	—	—	—	—	—	—	—	—
2.5	29	25	23	13	21	17	12	37	27	33	—	—	—	—	—	—	—	—	—	—
4	38	33	31	18	28	23	16	49	36	43	—	—	—	—	—	—	—	—	—	—
6	49	42	40	22	35	28	20	61	45	53	—	—	—	—	—	—	—	—	—	—
10	67	58	54	30	47	37	27	81	59	70	—	—	—	—	—	—	—	—	—	—
16	89	77	72	39	62	50	36	104	78	90	69	59	56	30	48	39	28	81	60	70
25	120	103	97	50	81	64	48	134	100	117	93	80	75	39	63	50	38	104	78	91
35	148	127	119	61	100	80	59	160	122	140	115	98	92	47	78	62	46	124	94	108
50	181	156	146	72	119	95	—	190	144	168	141	121	113	56	92	74	—	147	112	131
70	230	197	184	89	152	122	—	233	180	205	179	153	143	69	118	94	—	181	140	159
95	287	246	230	107	183	147	—	279	217	250	222	191	178	83	142	114	—	216	168	194
120	335	287	267	122	217	173	—	317	252	283	260	223	208	95	169	135	—	247	196	220
150	385	330	308	137	244	195	—	356	283	317	298	256	239	106	190	152	—	276	220	246
185	447	383	357	154	284	227	—	402	325	365	347	299	278	120	222	177	—	313	253	284
240	535	457	426	176	331	265	—	465	377	422	417	358	334	138	259	207	—	364	295	329
300	620	529	492	197	388	311	—	524	434	488	483	415	387	155	305	244	—	412	341	380
400	726	615	573	219	442	353	—	593	492	553	570	488	455	175	351	281	—	471	391	434
500	846	710	661	242	523	418	—	668	571	641	669	571	532	196	421	337	—	537	459	507
630	990	817	760	265	588	471	—	748	639	723	789	668	622	219	481	385	—	612	523	578

Size	Cu spaced apart	Cu spaced from surface	Cu touching	Cu sun	Cu enclosed air	Cu insulation partial	Cu insulation complete	Cu buried direct	Cu underground one enclosure	Cu underground separate enclosures	Al spaced apart	Al spaced from surface	Al touching	Al sun	Al enclosed air	Al insulation partial	Al insulation complete	Al buried direct	Al underground one enclosure	Al underground separate enclosures
1	16	14	13	8	12	10	6	21	16	19	—	—	—	—	—	—	—	—	—	—
1.5	20	17	16	10	15	12	8	27	20	24	—	—	—	—	—	—	—	—	—	—
2.5	29	25	23	13	21	17	12	37	27	33	—	—	—	—	—	—	—	—	—	—
4	38	33	31	18	28	23	16	49	36	43	—	—	—	—	—	—	—	—	—	—
6	49	42	40	22	35	28	20	61	45	53	—	—	—	—	—	—	—	—	—	—
10	67	58	54	30	47	37	27	81	59	70	—	—	—	—	—	—	—	—	—	—
16	89	77	72	39	62	50	36	104	78	90	69	59	56	30	48	39	28	81	60	70
25	120	103	97	50	81	64	48	134	100	117	93	80	75	39	63	50	38	104	78	91
35	148	127	119	61	100	80	59	160	122	140	115	98	92	47	78	62	46	124	94	108
50	181	156	146	72	119	95	—	190	144	168	141	121	113	56	92	74	—	147	112	131
70	230	197	184	89	152	122	—	233	180	205	179	153	143	69	118	94	—	181	140	159
95	287	246	230	107	183	147	—	279	217	250	222	191	178	83	142	114	—	216	168	194
120	335	287	267	122	217	173	—	317	252	283	260	223	208	95	169	135	—	247	196	220
150	385	330	308	137	244	195	—	356	283	317	298	256	239	106	190	152	—	276	220	246
185	447	383	357	154	284	227	—	402	325	365	347	299	278	120	222	177	—	313	253	284
240	535	457	426	176	331	265	—	465	377	422	417	358	334	138	259	207	—	364	295	329
300	620	529	492	197	388	311	—	524	434	488	483	415	387	155	305	244	—	412	341	380
400	726	615	573	219	442	353	—	593	492	553	570	488	455	175	351	281	—	471	391	434
500	846	710	661	242	523	418	—	668	571	641	669	571	532	196	421	337	—	537	459	507
630	990	817	760	265	588	471	—	748	639	723	789	668	622	219	481	385	—	612	523	578