Abstract: A junction box comprising a stack of terminal boards sandwiched between opposite faces of a rigid insulating housing, each terminal board comprising a series of metal strips spaced apart on an insulating sheet to define discrete current paths, substantially rigid end portions of at least some of the strips extending from each layer perpendicularly of the planes of the layers and being located in channels formed in insulating ribs in the housing to provide contact portions for connection of external circuitry to current paths in respective layers.