Garvin Industries' extension rings prevent the need to remove old conduit boxes and wiring from circuits when additional wiring is needed.
GARVIN®, 53151-SUB, Square Extension Ring, 1 Gangs, 12 Knockouts, (8) 1/2 in, (4) 1/2 in, 3/4 in Side Knockout, 4 in Length, 4 in Width, 1.56 in Depth, Squared Shape, Knockout Cable Entry, 21 cu-in Capacity, Steel, Zinc Plated, Silver
| Cable Entry Size | : | Knockout |
| Capacity | : | 21 cu-in |
| Color | : | Silver |
| Finish | : | Zinc Plated |
| Knockout Size | : | (8) 1/2 in, (4) 1/2 in, 3/4 in Side |
| Number of Knockouts | : | 12 |
| Shape | : | Squared |
| Number of Gangs | : | 1 |
| Length | : | 4 in |
| Width | : | 4 in |
| Depth | : | 1.56 in |
| Material | : | Steel |
- They are added to junction boxes to increase wiring capacity and provide access for additional conduit runs and electrical wire
- Their bottom mounting slots allow a quick installation onto existing boxes
- Combination knockouts allow for greater wiring flexibility
- Combination Philips®/slotted screw heads
- Converts 1G to 4 square, fits one and two gang rings and switch boxes
Full Engineering Drawing
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