Amendment No. 2.2 of the ETCI National Rules for Electrical Installations, ET101:2008 comes into effect from the 5th of September 2017. This update to the Wiring Rules will see the phasing out of traditional flat PVC/PVC cable with bare earth and its replacement by cable with an insulated earth conductor of the same cross section as the supply cable. The cable now specified is to be in accordance with I.S. 201-4 which was published in 2013. The significant change is driven by the adoption of this standard for cable by the amendment to ET101.