A moulded electrofusion fitting for connection to a plastics pipeline or spigot, comprising: a hollow body formed with a tubular opening that has a longitudinal axis and is adapted to receive an end of the pipeline or spigot inserted in the direction of said axis as a close sliding fit against an internal surface of the opening; an electrofusion element formed in the internal surface in the opening; at least one terminal pin (24a, 24b) protruding radially from said body and connected to an end of said electrofusion element; a terminal pin cover; a clamping surface (52; 53) on the end of the tubular opening; a grip ring adapted to fit said clamping surface; and an upstanding boss, preferably a hollow cylinder, protruding radially from said grip ring wherein upon rotation of said grip ring said terminal pin (24a; 24b) moves from being covered by said terminal pin cover to being received in said upstanding boss so as to allow access to said terminal pin for electrical connection thereto; wherein, when a pipeline or spigot is inserted in the opening and the grip ring is rotated about said axis, said grip ring engages said clamping surface whereby said pipe is gripped by said clamping surface, characterised in that said clamping surface is at least partially located in a cold zone adjacent said electrofusion element, and in that the terminal pin cover projects radially from said grip ring and is adapted to at least partially cover said terminal pin (24a; 24b) to prevent connection of an electrical connector thereto, wherein said rotation of the grip ring moves said terminal pin cover away from said terminal pin so as to allow access to said terminal pin for electrical connection thereto, and in that a longitudinal axis of said terminal pin cover is axially offset from a footprint of the grip ring. a hollow body formed with a tubular opening that has a longitudinal axis and is adapted to receive an end of the pipeline or spigot inserted in the direction of said axis as a close sliding fit against an internal surface of the opening; an electrofusion element formed in the internal surface in the opening; at least one terminal pin (24a, 24b) protruding radially from said body and connected to an end of said electrofusion element; a terminal pin cover; a clamping surface (52; 53) on the end of the tubular opening; a grip ring adapted to fit said clamping surface; and an upstanding boss, preferably a hollow cylinder, protruding radially from said grip ring wherein upon rotation of said grip ring said terminal pin (24a; 24b) moves from being covered by said terminal pin cover to being received in said upstanding boss so as to allow access to said terminal pin for electrical connection thereto; wherein, when a pipeline or spigot is inserted in the opening and the grip ring is rotated about said axis, said grip ring engages said clamping surface whereby said pipe is gripped by said clamping surface, characterised in that said clamping surface is at least partially located in a cold zone adjacent said electrofusion element, and in that the terminal pin cover projects radially from said grip ring and is adapted to at least partially cover said terminal pin (24a; 24b) to prevent connection of an electrical connector thereto, wherein said rotation of the grip ring moves said terminal pin cover away from said terminal pin so as to allow access to said terminal pin for electrical connection thereto, and in that a longitudinal axis of said terminal pin cover is axially offset from a footprint of the grip ring.