The item is used in connecting a light fitting or other device to the network supplying it. The counter coupling of NAD5T.W in the fitting is either NAC51.W or NAS51.W fitted in the device by the panel mounting adapter NK5P.W. The T-connector is fed with a NAC52S.W -coupler (or with an installation-ready cableset, where the NAC52S.W is coupled). The installation continues from the NAD5T.W T-connector to the next device with a NAC51S.W (or with an installation-ready cableset, where the NAC51S.W is coupled). The couplers to be connected to the T-connector are specified on page XX. Weight 38 g.