Junction box, protection class IP55/IP66, nominal cross-section 16 mm², Ui=690 V AC, certified by VDE (DIN EN 60670-1/-22 (VDE 0606-1/-22)), DLG (Ammonia resistance), knockouts, M20/M25/M32/M40/M50, (4 rear, 10 side), internal fixing points, with screwless terminals for standard indoor and protected outdoor installations