Hi

I am rewiring the upstairs lighting circuit of our house. I have chosen to
use 1.5mm 6242Y cable. I want to use the junction box method rather than
the loop-in method because I find it a pain trying to get three cables into
a ceiling rose. The junction box method requires 4 cables (switch, light,
loop-in and loop-out) per box and the books I have read suggest that it is
typical to connect 4 cables to a junction box.

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.

Please can someone comment on the limitation of 3x 1.5 cables per box and
suggest a solution?

Thank you

David