English: electricity network
Welsh: rhwydwaith trydan
Subject: Cynllunio
English context: The supply of power is the responsibility of electricity network operators and is regulated by UK Government and Ofgem. 
Welsh context: Gweithredwyr y rhwydwaith trydan sy’n gyfrifol am gyflenwi pŵer ac mae’n cael ei reoleiddio gan Lywodraeth y Deyrnas Unedig ac Ofgem. 
Plural: rhwydweithiau trydan