oh dear think i may have upset someone! i was not casting aspersions on the connectors made by the company line products...indeed never having seen one, let alone used one i can't comment on there products.
i always try not to have ANY joins in inaccessible locations, and when rewiring will pull wiring back to an accessible position in a cupboard etc and fit an A/D box and make my joins there.
if carrying out a alteration before a laminate or tiled floor etc is laid, i will extend cables using crimp connections in a A/D box if the above option is impossible. using dome type trs glands on the entries.
my point about grip type push in connectors, is based upon the number of times i have had to repair the things when they have burned out...this is in equipment or the supply connections to equipment. not in fixed domestic wiring.
all i was trying to say is that, a properly installed, good qaulity J/B is a tried and tested means of installation that has stood the test of time...loose connections are due to incorrect installation/diy/wrong rating J/B...i have been to jobs that were wired in the 60's...the screws were as tight as the day they were installed
push connections are a new ideal in domestic wiring [they may have been around for 20 years but not in widespread use] so time will tell, if they are a reliable and safe choice...until then, i will stick with crimps in inaccessible locations within a A/D box.
new products come and go...remember heatshrink micc seals back in the 80's by pyro? great product! done a few fire alarm installs with those, and they fit the old imperial piro if you had an end gone down....problem was, after a few years they started breaking down, and were withdrawn from sale. i bet they were thoroughly tested as well!
