made of polyamide 6.6, grey, 400V according to EN 60 947-7-1/DIN0611, part 1, nominal current 26 A in 5 different versions, suitable for combination with the installation terminal blocks, WKI and switchgear terminal blocks WK / WT Abbreviations NT = neutral conductor isolating terminal N = neutral conductor terminal D = phase through terminal SL = protective conductor terminal GL = glow lamp LD = light-emitting diode Three-wire installation terminals