| 摘要 |
PURPOSE:To adjust brightness in response to the use situation and conditions of shops, by providing wiring ducts with lighting fittings, and adjusting the brightness of the lighting fittings by means of power line carrier control dimmers. CONSTITUTION:A block filter 2 is connected to an end portion of the power source side of a wiring duct 1 disposed under a ceiling, thus preventing the transmission of signals by power line carrier control at the power source side of a lighting circuit of a shop to other consumers beyond a power source terminal. Power carrier control dimmers 3 are attached to a wiring duct 1 in a mounting and demounting-free shape by means of plugs 6, and lighting fittings 4 are installed to the dimmers. Lighting fittings necessary for no dimming may mirectly be mounted to the wiring duct 1, and the power line carrier control dimmers 3 may be operated by equipping the other end of the wiring duct 1 with a power line carrier controller 5. |
