AS/NZS 3008.1.1:2017

Table 4

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

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

Verified: read against the printed standard, pages 35–37. Checked 24 Sept 2026.

Units: Rating A

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

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20 rows

Table 4, Current ratings, single-core cable, two 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	16	13	8	13	11	6	18	18	21	—	—	—	—	—	—	—	—	—	—
1.5	21	21	16	10	18	14	8	23	23	26	—	—	—	—	—	—	—	—	—	—
2.5	30	29	23	13	24	20	12	32	32	36	—	—	—	—	—	—	—	—	—	—
4	40	39	31	18	32	25	16	41	41	47	—	—	—	—	—	—	—	—	—	—
6	51	49	40	22	41	33	20	52	52	58	—	—	—	—	—	—	—	—	—	—
10	69	67	54	30	54	44	27	69	69	77	—	—	—	—	—	—	—	—	—	—
16	92	89	72	39	70	56	36	122	89	99	72	69	56	30	54	43	28	95	69	77
25	124	119	97	50	94	75	48	158	116	129	96	92	75	39	73	58	37	123	90	100
35	153	145	119	61	112	90	59	190	139	155	119	113	92	47	87	70	46	147	108	120
50	187	177	146	72	138	110	—	225	168	186	145	137	113	56	107	86	—	174	130	145
70	238	223	184	89	170	136	—	277	206	228	184	173	143	69	132	105	—	215	160	177
95	295	276	230	107	212	169	—	332	252	278	229	214	178	83	164	131	—	257	195	215
120	344	321	267	122	242	193	—	378	287	316	267	249	208	95	188	150	—	294	223	245
150	395	367	308	137	282	225	—	424	329	354	307	285	239	106	219	175	—	329	255	274
185	459	424	358	154	320	256	—	480	373	408	357	331	279	120	249	199	—	374	291	317
240	549	505	428	177	381	305	—	556	438	472	427	394	334	138	298	238	—	434	342	368
300	636	582	495	198	—	—	—	628	496	546	495	456	388	155	—	—	—	491	388	425
400	744	676	577	221	—	—	—	713	575	621	583	535	456	175	—	—	—	564	454	487
500	867	780	668	245	—	—	—	805	649	721	685	624	535	196	—	—	—	644	520	570
630	1014	897	770	269	—	—	—	904	750	816	808	730	627	219	—	—	—	737	611	652

Cables

Protection

Loads

Power

Solar

Safety

Earthing

Testing

Fire

Regulatory

Table 4

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