The item is used in connecting a light fitting or other device to the network supplying it. The counter coupling of the NAD4T.W in the fitting is either NAC41.W or NAS41.W fitted in the device by the panel mounting adapter NK4P.W. The T-connector is fed with a NAC42S.W -coupler (or with an installation-ready cableset, where the NAC42S.W is coupled). The installation continues from the T-connector to the next device with a NAC 41S.W (or with an installation-ready cableset, where the NAC 41S.W is coupled). The couplers to be connected to the T-connector are specified on page XX. Weight 30,2 g.