On 17/05/2018 16:44, John Rumm wrote:
On 17/05/2018 15:29, wrote:

Our builder tucked some live junction boxes into a cavity wall and has
plastered over them.

What kind of JBs?

If they contained maintenance free terminals, then nothing to worry about.

If they were the screw terminal kind, and the circuit is lightly loaded
- then not to the wiring regs, but probably nothing to worry about.

If screw terminals, and a circuit subject to intermittent high load,
then more of a concern.

How much of a problem is this likely to be (if at all) and in what
time frame?

The reality is there are countless examples out there installed and
causing no serious problem. However if you have concerns then discuss
with the builder.


+1, but also is it *really* a cavity wall? Is it insulated? If so, this
*might* increase the overheating risk. If not, then at least there is no
real fire risk if it does go tits up.

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