These cables may be used when halogen-free, low smoke and corrosive gas properties are required in case of fire. H07Z1-K are designed for the internal wiring of switchboards and distributor boards a direct voltage up to 750 volts. Generally install in pipes or ducts and internal wiring of appliances , and generally in areas (such as public and government buildings) where smoke and toxic fumes may cause a threat to life and equipment. The cables produce no corrosive gasses when burnt which is particularly important where electronic equipment is installed.