"Stefek Zaba" wrote in message
...
Aldrich wrote:

However, I have just discovered that the "standard" 20A junction
boxes that
I have bought are only rated for 3 x 1.5 cables. One solution is to
use two
junction boxes, one to handle the loop-in/out and the other to handle
the
local lighting circuit. However, that seems a little inelegant and
costly on
boxes.

In what way "rated"? Do you mean it's hard to reliably secure four
1.5mmsq cores in the terminals provided? Or that the covers seem to
have only three exit positions? Or some other problem?

If the first - no-one's stopping you using 30A-rated JBs, and I find
the extra space in those is usually a Win for my fat fingers.

One small word of caution, in case someone less clued than the OP reads
this: a default 30A junction box is often a three-terminal one.
Screwfix sold (still sell?) some truly vile white 4-terminal boxes which
limited their cable capacity by using badly designed or made grub
screws - a long plain section beyond the thread meant that you could
only unscrew them a couple of turns before they fell out. Once you'd
retrieved them from the underfloor fluff you could always file them
down, and then discover that the brass insert was so flimsy that it
spread and let the screw pop out again as soon as you tightened it.


--
Kevin Poole
**Use current month and year to reply (e.g. )***
Car Transport by Tiltbed Trailer - based near Derby