Cable reel for low-resistance and earthing measurement. TR50 II, cable reel for low-resistance and earthing measurement, 50 m measuring cable. Handy cable reel 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 can use a measuring device to check, for example, whether the continuity of the protective conductor and potential equalization conductor has an electrical resistance of maximum 1 O. 1 measuring cable 50 m on cable reel with hand strap, 1 kV CAT III