We are working on a project with a suspended drywall ceiling. We are having an issue with installing fixture boxes. Caddy 512 brackets do not work as they are designed for a tile suspended ceiling where the tile sits in the grid. Do to box fill we need to use 4x4x2 1/8" deep boxes.
We are now using caddy 512A. We ran into the same issue with depth however. In order to make it work we either need to use a 4" square box with a 4"S extension box/ring or a 3.5" deep box. We ordered some 3.5" inch boxes but they do not have a center rear knockout so will not work with the caddy brackets. I found other 3.5" deep boxes with the center rear KO but they have some lead time. If we were to use a 4"x 1 1/2" deep extension box/ring to a 4" box will this be a code violation when used to support a 6.5lb light fixture.
We are now using caddy 512A. We ran into the same issue with depth however. In order to make it work we either need to use a 4" square box with a 4"S extension box/ring or a 3.5" deep box. We ordered some 3.5" inch boxes but they do not have a center rear knockout so will not work with the caddy brackets. I found other 3.5" deep boxes with the center rear KO but they have some lead time. If we were to use a 4"x 1 1/2" deep extension box/ring to a 4" box will this be a code violation when used to support a 6.5lb light fixture.
