- Reaction score
- 706
Hi does anybody know of single / double PVC back boxes that have multiple 20mm knockouts like metal clad? Or are plain with no knockouts ?
The ones with one 20mm and trunking knockouts don't really work as when cutting the 20mm hole the trunking entry normally splits even when bracing it.
The ones with one 20mm and trunking knockouts don't really work as when cutting the 20mm hole the trunking entry normally splits even when bracing it.