NF C42-198-7:1997 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 7 : phase sequence.
1997NF C42-198-7:1997 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 7 : phase sequence.