Abstract: A clip-on electrical terminal block has an earth terminal which grips one flange of a channel-section support rail with outwardly turned flanges. To prevent the earth terminal from drifting in the case of a flange of tapered cross section, a clamping member of the flange not only engages the underside of the flange but also has an inner arm which engages the internal surface of the channel-section rail. A single clamping screw clamps together the earth conductor, the clamping member of the terminal, and the flange of the support rail, by means of a lower arm of the clamping member. To facilitate access to the clamping screw in the case of a terminal block with stacked terminals, the region of the terminal block housing containing the earth terminal may be laterally offset.

Abstract: An electrical multi-way terminal block having pairs of terminal in upper and intermediate regions, each pair being interconnected by a conductive member and being accessible for connection of a conductor. A tool access passage for one of the intermediate region terminals, which is offset into the interior of the block, extends from the upper face of the block transversely past the conductive member interconnecting the upper pair of terminals and is insulated from the latter, avoiding obstruction by a conductor connected to the upper terminals.

Abstract: A cross-connecting comb for interconnecting electrical terminals consists of a metal back and metal teeth, and a U-section insulating plastic sheath enclosing the metal back and provided with locking means holding the sheath in position on the metal back, the teeth projecting through apertures in the sheath.