An anchor clamp for insulated free leads, having a clamp body

which has a C-type cross-sectional profile with two opposingly open grooves, of which the one groove is provided

with projections in the longitudinal zone forming one flank, which projections protrude into the groove at a distance

from one another in the groove longitudinal direction, has an electrically insulating clamping wedge, engaging between

the grooves, which has a groove for holding a conductor only along its one flank and its other flank is provided with a

cross-sectional profile allowing access into the groove and providing a support there only to the longitudinal zone that

is free of the projections.