EN60204 and twin ferrules

Afternoon,

My understanding and interpretation over the years and as many have indicated below. The terminal design is what is important. So if a terminal is only designed for one "Conductor" then thats because the clamping mechanism has been designed to tighten and possibly lock around one single cylindrical shape in other words the pin of a cable lug or bootlace ferrule.

The wording is indicating if you had two solid conductors or indeed two pins of cable crimps or two bootlace ferrules the manufacturer cannot then guarantee with the standard that those conductors will not come loose. Whearas what I call a "Piggy Back" terminal has basically a rear and front layer so two conductors, one in each layer and hence design of terminal makes everything common.

As long as the conductor size and type and Max loads are appropriate for a twin ferrule, are prepared and inserted correctly and crimped down with the appropriate ratchet crimping tool then nothing wrong with that.

I have had a few clients that in their specs, reject twin ferrules, simply due to trying to work on a single conductor in the future. Also if the idea of the twin ferrules is to loop lots of terminals together so to form a common terminal rail I would reject that and use the terminal manufacturers own designed linking assemblies/components for doing that.

In fact if you think about it, its acceptable where using a honeycombe linking assembly that a single conductor goes in with one of the points of the honeycombe rail to make it common, but in some ways that situation is two conductors in a terminal!

Cheers GTB

Afternoon,

My understanding and interpretation over the years and as many have indicated below. The terminal design is what is important. So if a terminal is only designed for one "Conductor" then thats because the clamping mechanism has been designed to tighten and possibly lock around one single cylindrical shape in other words the pin of a cable lug or bootlace ferrule.

The wording is indicating if you had two solid conductors or indeed two pins of cable crimps or two bootlace ferrules the manufacturer cannot then guarantee with the standard that those conductors will not come loose. Whearas what I call a "Piggy Back" terminal has basically a rear and front layer so two conductors, one in each layer and hence design of terminal makes everything common.

As long as the conductor size and type and Max loads are appropriate for a twin ferrule, are prepared and inserted correctly and crimped down with the appropriate ratchet crimping tool then nothing wrong with that.

I have had a few clients that in their specs, reject twin ferrules, simply due to trying to work on a single conductor in the future. Also if the idea of the twin ferrules is to loop lots of terminals together so to form a common terminal rail I would reject that and use the terminal manufacturers own designed linking assemblies/components for doing that.

In fact if you think about it, its acceptable where using a honeycombe linking assembly that a single conductor goes in with one of the points of the honeycombe rail to make it common, but in some ways that situation is two conductors in a terminal!

Cheers GTB