Installation Recessed mounting in suspended ceilings. Unventilated or ventilated ceilings. For suspended ceilings with visible T-bars (15 or 24 mm). Do not cover with insulation. For detailed information, see the installation instructions on our website. Connection Connection in separate ballast box.Snap-in terminal block 3x2,5mm2 (x2), through-wiring possible. 5x2,5mm2 (x2) when dimming. Can also be supplied with earthed mains cable and plug. Design Luminaire body of white enamelled sheet steel (RAL 9016). Louvre Delta – microprism louvre in UV stabil polystyrene. Miscellaneous Enclosure class IP 44 under suspended ceilings and IP 20 above suspended ceilings.