Technical Resources

We have gathered together a number of technical resources for use as reference on electrical projects.

DISCLAIMER: The information on this page and the PDF is for information only and R&M Electrical Group Ltd can not be held liable for any information therein.

Cable: MICC Cables

Download as PDF

TABLE 4G1A Mineral insulated cables thermoplastic covered or bare and exposed to touch (copper conductors & sheath)

• 30°C Ambient Air Temperature
  70°C Conductor Operating Temperature
• Current Carrying Capacity (amperes)

Conductor cross-sectional area	Reference Method C (Clipped Direct)			Reference Method E, F or G
	single phase AC or DC	three phase AC		single phase AC or DC	three phase AC
	2 single cord cables touching or 1 2-core cable	3 single core cables in trefoil or 1 3-core or 4-core cable	3 single core cables flat and touching, horizontal or vertical	2 single cord cables touching or 1 2-core cable	3 single core cables in trefoil, or 1 3-core or 4-core cable	3 single core cables flat and touching, horizontal or vertical	3 single core cables flat & spaced by one cable diameter
							vertical	horizontal
LIGHT DUTY 500V
1	18.5	15	17	19.5	16.5	18	20	23
1.5	23	19	21	25	21	23	26	29
2.5	31	26	29	33	28	31	34	39
4	40	35	38	44	37	41	45	51
HEAVY DUTY 750V
1	19.5	16	18	21	17.5	20	22	25
1.5	25	21	23	26	22	26	28	32
2.5	34	28	31	36	30	34	37	43
4	45	37	41	47	40	45	49	56
6	57	48	52	60	51	57	62	71
10	77	65	70	82	69	77	84	95
16	102	86	92	109	92	102	110	125
25	133	112	120	142	120	132	142	162
35	163	137	147	174	147	161	173	197
50	202	169	181	215	182	198	213	242
70	247	207	221	264	223	241	259	294
95	296	249	264	317	267	289	309	351
120	340	286	303	364	308	331	353	402
150	388	327	346	416	352	377	400	454
185	440	371	392	472	399	426	446	507
240	514	434	457	552	466	496	497	565

Notes: For single core cables, the sheaths of the circuit are assumed to be connected together at both ends. For bare cables exposed to touch, the tabulated values should be multiplied by 0.9.

TABLE 4G2A Mineral insulated cables bare and neither exposed to touch nor in contact with combustible materials (copper conductors & sheath)

Current Carrying Capacity (amperes)

30°C Ambient Air Temperature,
105°C Conductor Operating Temperature,

Conductor cross-sectional area	Reference Method C (Clipped Direct)			Reference Method E, F & G
	Single phase AC or DC	Three phase AC		Single phase AC or DC	Three phase AC
	2 single core cables touching or 1 2-core cable	3 single core cables in trefoil, or 1 3-core or 4-core cable	3 single core cables flat and touching, horizontal or vertical	2 single core cables touching or 12-core cable	3 single core cables in trefoil, or 1 3-core or 4-core cable	3 single core cables flat and touching	3 single core cables flat & spaced by one cable diameter
							vertical	horizontal
LIGHT DUTY 500V
1	22	19	21	24	21	23	26	29
1.5	28	24	27	31	26	29	33	37
2.5	38	33	36	41	35	39	43	49
4	51	44	47	54	46	51	56	64
HEAVY DUTY 750V
1	24	20	24	26	22	25	28	32
1.5	31	26	30	33	28	32	35	40
2.5	42	35	41	45	38	43	47	54
4	55	47	53	60	50	56	61	70
6	70	59	67	76	64	71	78	89
10	96	81	91	104	87	96	105	120
16	127	107	119	137	115	127	137	157
25	166	140	154	179	150	164	178	204
35	203	171	187	220	184	200	216	248
50	251	212	230	272	228	247	266	304
70	307	260	280	333	279	300	323	370
95	369	312	334	400	335	359	385	441
120	424	359	383	460	385	411	441	505
150	485	410	435	526	441	469	498	565
185	550	465	492	596	500	530	557	629
240	643	544	572	697	584	617	624	704

Download as PDF