| 摘要 |
A fastening device for mounting an electrical fixture suspended from an electrical junction box in a ceiling. When a mounting bracket assembly suspends the electrical junction box between two joists, the fastening device is an overlay positioned adjacent to each end-plate of the support bar. When the electrical junction box attaches directly to a joist, the fastening device is an overlay positioned inside a cavity of the electrical junction box. The overlay includes fastener openings that position a preset fastener to attach the end-plates to the spaced joists, or openings in the top wall of the cavity to attach the electrical junction box to a joist in the ceiling. The overlay also includes radial incisions, cut in a star pattern, that surround each fastener opening. When an installer tightens all of the fasteners, the star patterns open and allow the installer to easily pull-out and remove the overlay.
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