When used together with EN 50290 and EN 50289, this European Standard covers cables for instrumentation, inter-connection of equipment and information technology cabling applications. Cables for information technology cabling systems, covered by this standard are suitable for use in digital and analogue data systems meeting the requirements, for example, of EN 50090-2-1, EN 50090-3-1, EN 50098-1, EN 50098-2 and EN 50173. Instrumentation cables covered by this standard are suitable for connecting instruments and control systems for analogue or digital signal transmission. Unless otherwise specified, all cables covered by this standard may be subjected to voltages greater than 50 V a.c or 75 V d.c. but not more than 300 V a.c. or 450 V d.c. and shall meet the essential requirements of the low voltage directive. Due to current limitation related to the conductor cross sectional area, they are not intended for direct connection to mains electricity supply. The maximum current rating per conductor is less than or equal to 175 mA unless otherwise specified in the relevant sectional specification. Cabling elements as defined in 4.3 of this standard may be incorporated in hybrid construction cables together with coaxial or optical fibre cabling elements.