I agree, they seem very secure and give a sound connection. When you tried to pull the termination apart, did you have the strain relief correctly fitted? When fully fitted, i imagine the joint is near impossible to pull apart by hand
In fact, even
without using the strain relief, I found it near impossible to pull the conductors out by hand, although I could with appreciable 'mechanical assistance'. However, I don't think one should read too much into that, since much the same is true when I do bench experments with screw-terminal JBs.
Have you seen one fail?
Not really applicable, in my case. To be fair, I haven't seen a screw-terminal JB 'fail', either - although I imagine that's probably a function of my limited exposure.
fair enough. Somewhat similar to your position on exposure to crimping
I don't think that's very fair;
Oh? I think it is very fair, you haven't seen one of these M/F boxes fail, you haven't seen a crimp fail.
it's totally different from the discussion about crimping. Far from expressing any doubts about the 'maintenance-free' products 'based on no experience' (which I assume is what you're suggesting), I have more than once expressed my view that they look pretty good and that they might even be sufficiently good that the authors of a future edition of BS7671 will decide that they are acceptable for use in inaccessible places. The discussion is specifically about whether the current BS7671:2008 allows their use in inaccessible locations - and I personally have my doubts.
No need to be upset, John, and i would have thought a person of your mental ability would have refrained from making assumptions. If you spend a bit of time looking at my earlier comment 'is it beyond the realms of possibility....'. It seems as though you may have missed my point.
Not really possible, since it's not a compression joint - it's a spring one., which isn't really the same thing.
Are you suggesting that these terminals are not exerting some kind of compressive force upon the conductor and that that force is not appropriate for the task? It looks like they are.
No, I'm not suggesting that, but I think we need some basic common sense here. Of course there is a compressive force applied to the conductor with these connectors. Similarly, there is a compressive force applied by a screw terminal, and you might even argue that a screwdriver becomes an "appropriate compression tool" in that context.
No i wouldn't argue that at all. A screwdriver is designed to rotate screws, not to be a compression tool.
However, if you went down that path, I'd probably conclude that you were arguing for argument's sake
lol, pot/kettle ?
- since I think it perfectly clear to most people that the regs did not intend that "a joint made with an appropriate compression tool" would include screw-terminal joints.
there is a distinct difference between a screw joint and one made by a spring loaded terminal. Over a period of time, due to possible thermal cycling, the screw could work loose and have no means of re-setting itself, the spring terminal is clearly quite different.
The Ashley/Hager connections are made without use of an actual tool (in the generally accepted meaning of the word) of any sort.
as it has previously been discussed in other threads, who is to define what is appropriate? Does the BRB make allowance for new or innovative products?
I dont really wish to go down this well-trodden, never ending path on who complies with who.
That's up to you, but if that's how you feel, then I would suggest that you would probably be more comfortable not attempting to contribute to this thread
I'm quite comfortable with my input, thanks for your concern. Its just that this subject has been discussed before. It may be new to you with your cut off of 6 months of history here, but for those who have been here longer, or have chosen to use the search facility, it is today's chip wrapping
- which I started specifically and exclusively because of the question of the compliance (or otherwise) with BS7671 of these Ashley/Hager connectors in inaccessible locations.
Kind Regards, John.
I thought the thread was to do with editing the wiki on this subject, which i believe (some time ago) sheddy suggested that you could do this yourself