2 4mm cables into one hole?

[JohnD]

fine wires that should have been properly terminated? I suppoose a bootlace ferrule or something? but what are they doing in domestic sockets?

 

[SUNRAY]

In my work which is mostly commercial controls the biggest fault BY FAR is failures where stranded wire has burnt out due to not enough strands being clamped. in domestic switches and sockets with a grub screw through a tubular hole if the wires are not twisted some of the strands can end up beside the screw and therefore not clamped and thats another maintenance visit.

526.8

Regs or not.
Faults = fire hazard = unhappy customers.
No faults = happy customers = living customers
QED

Hope that makes more sense

 

[ban-all-sheds]

¿Que?

 

[ban-all-sheds]

Regs or not.
Faults = fire hazard = unhappy customers.
No faults = happy customers = living customers
QED

I'd worked out what words you meant to type.

Hope that makes more sense

Not really, in the context of this exchange:

In my work which is mostly commercial controls the biggest fault BY FAR is failures where stranded wire has burnt out due to not enough strands being clamped. in domestic switches and sockets with a grub screw through a tubular hole if the wires are not twisted some of the strands can end up beside the screw and therefore not clamped and thats another maintenance visit.

526.8

Regs or not.
Faults = fire hazard = unhappy customers.
No faults = happy customers = living customers
QED

 

[ColJack]

in comercial controlls, every single stranded wire connection should have a ferrule on it or suitable crimp connector..

if you have to get 2 wires into one terminal there are twin ferrules that are designed to take 2 wires..

 

[securespark]

All the sockets I have used (even volex!) will take 2no. 4.0mm² conductors

 

[RF Lighting]

Sometimes needs must

 

[securespark]

No worries! I once bought 50 double sockets from ScrewUp @ 59p each...

To their credit, I didn't get recalled to any of them.

 

[SUNRAY]

in comercial controlls, every single stranded wire connection should have a ferrule on it or suitable crimp connector..

if you have to get 2 wires into one terminal there are twin ferrules that are designed to take 2 wires..

As far as I am concerned that is totally correct and keep a stock of each size of bootlace ferrule from .22mm to 6mm single and double but there are people out there doing panel work who don't use them and some dont use tri rated..... in fact one of the companies I have done some work for didn't use ferrules on anything bigger than 1mm.

Most of my work is based on control panel modification and fault finding. The majority of faults I encounter are in the 6491X or armoured field wiring where the termination is loose or not all of the strands are trapped in the terminal and those that are have burnt through. I find that twisting the wire into an even round shape [more like a solid core] reduces this problem.

 

[SUNRAY]

fine wires that should have been properly terminated? I suppoose a bootlace ferrule or something? but what are they doing in domestic sockets?

try a 4mm T&E into a 45A pull switch

 

[SUNRAY]

...stranded wire has burnt out due to not enough strands being clamped. in domestic switches and sockets

domestic stranded must be flex, unless you mean 1960's stranded imperial cable

But what are they doing putting flex into sockets and switches?

Flex outlet from spur maybe or maybe a ceiling rose but I was referring to a larger T&E, say a 6mm into a 45A switch with a grub screw in the side of a tubular terminal rather than the preferable clamp type.