| 摘要 |
An electrical connection system for concrete ceiling is characterized in that it includes a box (6), at least one lead-through (12) for a cable/wires (13, 14) in the box, an opening (5) in the concrete wall (1) of the ceiling for bringing the cable /wires (13, 14) through the opening (5) and through the lead-through (12) into the box (6) and for inserting the box thereafter into the opening, means (15) for attaching the box (6) tightly to the opening (5), and means (10) at the lower end of the box (6) for attaching a lid (16) or an appliance with corresponding attaching means (11) to the box (6). The invention concerns also a corresponding electrical connection box. An advantage of the invention is that an electrician is able to finish the installation in one go so that an unskilled person is able to connect e.g. a quick-attachable VDC fire alarm device to the box. An electrician or an unskilled person may connect also other appliances without need to drill holes in the ceiling for attachment of the appliances.
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