Basic norms of interchangeability. ISO general purpose metric screw threads. Tolerances. Limits of sizes for internal screw threads to mate with hot-dip galvanized external screw threads with maximum size of tolerance position h before galvanizing
Low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. Electrical safety. Equipment for testing, measuring or monitoring of protective measures. Part 4. Resistance of earth connection and equipotential bonding
