NF C42-198-4:1997 Electrical safety in low voltage distribution systems up to 1 kV A.C. and 1,5 kV d.c. Equipment for testing, measuring or monitoring of protective measures. Part 4 : resistance of earth connection and equipotential bonding.
1997NF C42-198-4:1997 Electrical safety in low voltage distribution systems up to 1 kV A.C. and 1,5 kV d.c. Equipment for testing, measuring or monitoring of protective measures. Part 4 : resistance of earth connection and equipotential bonding.