Wago double deck 1 and 2 conductor din rail terminal blocks 2022 series wago 2022 2237 wago 2022 2237 pe double deck 2 conductor ground carrier din rail mount terminal block colour green yellow for wire sizes awg 22 12 pack size 1 wago 2022 2237 pe dbl deck 2 cond ground carrier t block grn ylw awg 22 12