Installation switching device e.g. line safety switch, has free clamping arm-end piece part outwardly accessible through opening without inserted conductor in released condition of spring and including electrical insulating layer

摘要

The device (30) has a spring clamp including a clamping spring (20) with curved spring rear parts (27) connecting support and clamping arms (21, 24). A connection conductor is clamped between rear sides of a clamping strip (23) of a bus bar (22) and a clamping edge (26) of a clamping window (25). A housing includes a conductor insertion opening (40) to insert the conductor into the clamp. A part of a free clamping arm-end piece, which is outwardly accessible through the opening without the inserted conductor in a released condition of the spring, includes an electrical insulating layer (38).