On Mon, 8 Jun 2009 10:52:34 +0100, "dennis@home"
had this to say:

I want to fit some GE minitrips to a CU that has wired fuses in it.
The trips just plug into the existing slots.
However they are too deep to fit the cover.
Is the cover a requirement or even necessary once the minitrips are in
place?
If they are required does anyone know where to get a deep one for a Volex
CU?

I think that Volex used to make a deep cover, but I've never seen nor
used one.
As long as you're not likely to bump into the trips you shouldn't have
any problems. My last setup was like that.

--
Frank Erskine