NF C42-198-2*NF EN 61557-2:2007 Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 2 : insulation resistance.
1997NF C42-198-2:1997 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 2 : insulation resistance.