Why MICC?

“MICC, Mineral Insulated Cable Company” are “Highly Trained Specialists in a Highly Specialised World”.

Mineral Insulated Cable (MICC) has been in use commercially since 1937, the fact that it is still widely used today is evidence that it has not been bettered by any other cable system. Soft skinned polymeric cables are a compromise in safety, fire performance and longevity when comparisons are made to MICC cables.

Any cable system that relies on polymers for conductor insulation will burn and will be very likely to fail in a real fire situation, MICC cable does not rely on polymers for insulation. Mineral Insulated Cable is totally Inorganic and Silicone free in construction. The main construction consists of solid copper conductors (cores), highly compressed magnesium oxide (MgO) insulation and a solid copper sheath. This unique construction gives melting points of 1083°C and 2800°C for the copper and insulation respectively. This provides fire survival whilst continuing to safely carry a load for 3 hours at 950°C and for short periods of time in temperatures in excess of 1000°C. MICC cables can also be considered to be non-aging as copper and MgO will not deteriorate with age in most situations.
Cables normally need to be replaced as the polymers used for insulation breakdown causing the insulation resistance (IR) to fall thus creating an unsafe system. The total life cycle costs of MICC cables in a building with a typical 40 – 50 year design expectancy would be considerably less than those using an XLPE steel wire armoured LSZH fire resistant cable, thus off-setting any initial capital expenditure. For the majority of modern installations, bare copper sheathed cable will suffice requiring no additional outer covering. In this state the cable is resistant to oil, water and many other gases and liquids. Where the natural corrosion resistance of the copper sheath is not sufficient, it can be augmented with an additional LSZH (low smoke zero halogen) outer covering. This outer covering can also be used for coloured circuit identification or visual appearance.

For a full copy of our current price list, please contact a member of our customer services team on 0845 0540460.

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