Doubling over conductors in ring circuit

[Wilko]

For what its worth - I usually fold single conductors less than 6mm and leave twins flat.

 

[David345]

Most terminals have a min-max range of what they are designed to reliably clamp. If your cable is below the minimum value you would have to double over or use a crimp pin, etc, to meet the manufacturer's specification.

But for most domestic CU devices I expect they are rated to clamp as low as 1mm for lights, etc.

Most terminals have a min-max range of what they are designed to reliably clamp. If your cable is below the minimum value you would have to double over or use a crimp pin, etc, to meet the manufacturer's specification.

But for most domestic CU devices I expect they are rated to clamp as low as 1mm for lights, etc.

Makes sense

 

[pirate]

Is it just me?
Double over when single conductor, not usually when 2 or 3, obviously...
Tighten them up using my wrist-torquedriver...and then, after allowing a wee while for "creep", pinch 'em up a tiny bit before putting the faceplate back on.
CPCs...put all ends in drill-driver, tighten chuck and press the trigger!

 

[Lucien Nunes]

Is there a regulation on this?

Thankfully no, other than the general requirement for good workmanship to be used. The regs are not there to teach the technique of being an electrician, that is down to the individual. Look at the terminal design and size, look at the number, size and type of conductors to be terminated, possibly even look at the manufacturers specifications. The using your professional skill and experience, choose the best method to make a mechanically secure, resilient, low-resistance termination in that specific scenario.

 

[ipf]

Unless I judge it necessary, I don't double over. Socket and switch terminals, at least, are designed to take individual cables. Never have problems.
Donkeys years back, I used to double most but was advised about more stress being exerted on the termination point. Each to their own, I suppose
.....just can't stand RFC's with 'beautifully' twisted together cpc's.