Through crimp on solid core wire... what do we reckon

[Dustydazzler]

Its okay / does the job Or rough as a badgers and should be a wago / push fit style connector

Thoughts ?

 

[Lucien Nunes]

It's hard not to agree as far as a joint in domestic 2.5 T+E is concerned, but the regs apply equally to a 185mm² cable carrying 400A and I know which connection method I would prefer to see there.

If correctly specified and properly fitted, crimp terminals are an effective and reliable method of connection. There's no need for the regs to call out incorrect or badly-installed crimps separately, because there is already a reg about suitability and quality of materials and workmanship.

 

[lozarus]

It's hard not to agree as far as a joint in domestic 2.5 T+E is concerned, but the regs apply equally to a 185mm² cable carrying 400A and I know which connection method I would prefer to see there.

If correctly specified and properly fitted, crimp terminals are an effective and reliable method of connection. There's no need for the regs to call out incorrect or badly-installed crimps separately, because there is already a reg about suitability and quality of materials and workmanship.

A very valid point, which blinded by the types of cables i encounter, I'd failed to recognise.

I have certain views on that whole MF thing which are a little off topic for this post. But I'm short the whole thing concerns me. I see many well trained electricians installing MF Joints - but if you read the small print on exactly how they should be installed and with which specific connector types, they often aren't. IE wagobox, although MF actually only complies with certain types of wago and if installed in a specific way.

Your comment on "appropriate connection" would have sufficed in my mind.

 

[AdamSmith86]

I have crimped T&E under floorboards in the past, before Wagos where about. I slip a length of heat shrink over the joint and then house it in a chocbox with the strain relief clamps fitted. That is then screwed to a joist. I think if it is not likely to be put under any stress or movement then it is a suitable solution.

 

[cliffed]

Wagos for me plenty of room to do that

 

[Lucien Nunes]

I agree that strain relief on an MF joint is a good thing, you don't want it being disrupted if you can't check or fix it. But relying on strain relief to protect a mechanically insecure connection from parting company is not so good. In my book, if cables can be pulled or wriggled free from a crimp, it's not a satisfactory connection, even if you've arranged to stop them being be pulled. It is an indication that the terminal and conductor are not properly cold-welded or interlocked with each other, so that the contact surfaces are properly gas-tight against oxidation and have enough pressure to resist thermal cycling forces.

When you try to pull a really sound crimp apart, the cable should normally stretch and break leaving a stub in the terminal, or only come free from the terminal by pulling it out of shape or breaking it.