Butt crimps

[Discharged]

Hi, I want to split a power supply lead into two - one going to supply one output, the other going to another, and up to now I have been cutting the wire in question (1.5mm sq) and putting two wires into one end of a butt splice/crimp and another wire out the other side.

However, I'm not totally happy with this arrangement, and am wondering if there is such a thing as a splice that can allow a third wire to split off? Maybe shaped like a 'T', perhaps?

Any such thing available?

 

[LineProducts]

They're not considered MF though, right? (despite seeming to use exactly the same spring idea as in others that are)

Hi
I have been trying to find a "genuine" mf connector (especially for amendment 1). Which ones are you referring to?

Mad Spark, butt crimps are covered in bs7671 526.3 (iv)

 

[Rockingit]

We know mechanical compression joints (crimps) are classed as MF, my question was about whether wago's are or not.

 

[LineProducts]

Rockingit, regarding WAGO's you mentioned "..use the same...others that are [mf]". Please let me know which others are mf.

In answer to your question WAGO have issued the following statement which applies to installations under BS7671 2008 and on condition that a BS60670-22 enclosure that is certified to be used with their connectors (there are only two such enclosures - LINE being one of them. (WAGO have yet to complete testing for BS7671:2011 (amendment 1). At this time I am also not aware of ANY mf connectors/JBs that meet the requirements of 526.3 (vi) (i.e.BS5733)


"I can confirm that Wago is happy that the terminal ranges 222 and 273when used as you describe [bs60670-22] are compliant with BS7671:2008 as"maintenance free terminals"." - technical manager


As part of their Q & A series, the ESC have issued the following statement for mf from 31 dec:

Can I use an electrical connector having ‘push fit’ connections that the manufacturer claims are maintenance free in an area that will be inaccessible when the installation is complete?

Not necessarily. Not all types or designs of push fit (screwless-type) clamping units comply with the requirements of Regulation 526.3 (vi).
If the connector will be inaccessible when the installation is complete, it must comply with BS 5733 for a maintenance-free accessory, be marked with the ‘MF’ symbol indicated in Regulation 526.3 (vi), and be installed in accordance with the manufacturer's instructions.
BS 5733 requires, for example, tests for resistance to ageing, cyclic loading, overload, fault current and vibration

 

[DaveyD]

WoW! and that's exactly one year ago now that I was discussing when the "powers that be" would sort out if wagos qualify as a MF joint. "Wait till the first amendment" was the general thought. Now here we are going in circles again. These poor designers of new connectors and enclosures must be banging their heads against the wall.