Are crimping ferrules safe in any electrical job?

When dealing with thinly stranded wire then I'd say yes, they effect a better quality connection and do help with keeping the stands where they need to be. I started crimping around a year ago - got a kit and ferrules in a local wholesaler, and have been using it on every stranded connection since. Just as long as the ferrules are good quality, there won't be a concern as the clamping force of the screw-terminal should make the connection with the strands even if the crimper doesn't.

All big industrial jobs. Everything stranded is ferruelled. So yea safe enough.If its done and crimped right. If its single soild. U dont.

Id be skeptical that there's an imroved electrical connection with ferrules as you're introducing another contact point between ferrule and conductor

Haven't noticed loose strands on coarse stranded cable to be an issue at connectors. The fine stranded would be twisted .

No doubt there's benefit in tidying up fine strands and also securing connections ,especially the fine- stranded panel flex at distribution boards where loose strands would be a major hazard

It's only the improved electrical connection im dubious about

Any type of panels/boxes/ distribution boards they're a necessity on the fine- stranded

The work would be shambolic without them , color coding, neatness , and bunching the fine strands together preventing erroneous connections

The ops work on lights /sockets will be all coarse stranded and solid conductors , no need for ferrules

221 lever type below compatible with fine stranded (flex)

773 push-fit compatible with (up to 19) stranded

Panels without ferrules would look like amateur hour