- Reaction score
- 6,964
Agree. There's nothing wrong with a piece of ply stood off the wall for rear entry...The answers I've been told is, the fires start from loose terminals in the tops of MCB's and the flames melt the plastic CU which spreads the fire, so any opening below the top of the CU doesn't need sealed, hence the reason why I bring my cables in through the back knock outs and I only put flexible grommet strip round to stop damage to the outer sheathing.