Cable: MICC Cables

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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 areaReference Method C (Clipped Direct)Reference Method E, F or G
single phase AC or DCthree phase ACsingle phase AC or DCthree phase AC
2 single cord cables touching or 1 2-core cable3 single core cables in trefoil or 1 3-core or 4-core cable3 single core cables flat and touching, horizontal or vertical2 single cord cables touching or 1 2-core cable3 single core cables in trefoil, or 1 3-core or 4-core cable3 single core cables flat and touching, horizontal or vertical3 single core cables flat & spaced by one cable diameter
verticalhorizontal
LIGHT DUTY 500V
118.5151719.516.5182023
1.52319212521232629
2.53126293328313439
44035384437414551
HEAVY DUTY 750V
119.516182117.5202225
1.52521232622262832
2.53428313630343743
44537414740454956
65748526051576271
107765708269778495
16102869210992102110125
25133112120142120132142162
35163137147174147161173197
50202169181215182198213242
70247207221264223241259294
95296249264317267289309351
120340286303364308331353402
150388327346416352377400454
185440371392472399426446507
240514434457552466496497565

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 areaReference Method C (Clipped Direct)Reference Method E, F & G
Single phase AC or DCThree phase ACSingle phase AC or DCThree phase AC
2 single core cables touching or 1 2-core cable3 single core cables in trefoil, or 1 3-core or 4-core cable3 single core cables flat and touching, horizontal or vertical2 single core cables touching or 12-core cable3 single core cables in trefoil, or 1 3-core or 4-core cable3 single core cables flat and touching3 single core cables flat & spaced by one cable diameter
verticalhorizontal
LIGHT DUTY 500V
12219212421232629
1.52824273126293337
2.53833364135394349
45144475446515664
HEAVY DUTY 750V
12420242622252832
1.53126303328323540
2.54235414538434754
45547536050566170
67059677664717889
109681911048796105120
16127107119137115127137157
25166140154179150164178204
35203171187220184200216248
50251212230272228247266304
70307260280333279300323370
95369312334400335359385441
120424359383460385411441505
150485410435526441469498565
185550465492596500530557629
240643544572697584617624704

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