Cavity wall junction boxes, 20 KNOCKOUTS for NYM lines, data cables and tubes Ø 20 mm, with cover and lid screws, with white cover and lid screws (flame-resistant according to VDE 0471/DIN 695 part 2-1, Test Temperature 750°C), for plate thickness 7-35mm.
Suitable for the installation of standard rails (hat and mounting rails) for terminal blocks, protection class IP20.
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