"Ben Blaukopf" wrote
| Christian McArdle wrote:
| I cannot change the old backbox.
| There's no can't about it. It is not acceptable to have such a
| large gap.
| You must put new backboxes in, closer to the new surface. It
| isn't that
| difficult to do. The gap is so large that the old ones can
| stay buried beneath.
| I'm about to leave a small gap, as changing from a painted wall to
| a tiled one. So what is an acceptable gap? Less than finger width?

The connections must be enclosed in a non-flammable enclosure. A disparity
between box and faceplate filled with plaster/tile should be acceptable, but
a hole (possibly into the dry-lined void) is not.

Owain