Shop our selection of Ceiling box, Boxes & Brackets in the Electrical Department at The Home Depot. 2019. 6. 27. - Learn about the many common types of wall and ceiling electrical boxes for switches, outlets, light fixtures, ceiling fans, and junction boxes. Buy products related to ceiling fan electrical box products and see what customers say about ceiling fan electrical box products on Amazon.com ✓ FREE . You use electrical boxes to join two or three runs of wire together, hold switches and receptacles, or to hang light fixtures. The shape of the box often determines . If you're installing a heavier light fixture or a ceiling fan, you'll need to replace the electrical box in the ceiling with one that can support the extra weight. You also . Shop electrical boxes in the electrical boxes & covers section of Lowes.com. . 1-Gang Blue PVC Interior New Work Standard Round Ceiling Electrical Box. Shop Ceiling fan electrical boxes in the electrical boxes & covers section of Lowes.com. Find quality electrical boxes online or in store. With the fixture out of the way, try to determine whether the electrical box is securely fastened to a ceiling joist or support bracket. Fans can weigh up to 50 .