Cable drum for low-resistance and earthing measurements. TR50 II, cable drum for low-resistance and earthing measurements, 50 m measuring cable. Handy cable drum with winding mechanism and cable guide. The accessories are suitable for measuring the potential equalization and protective conductor resistance as well as for earthing measurements. The user checks, for example, with the help of a measuring device whether the continuity of the protective conductor and the potential equalization conductor has an electrical resistance of maximum 1. 1 measuring cable 50 m on a cable drum with hand strap, 1 kV CAT III
