Jointing cable in wall to be filled and wiring zones

[Tauruselec]

Hi all. This is my first post on here so hopefully some of you will be able to suggest something other than my ideas. Worked as a spark for 19 years but mainly commercial so you guys will have better ways of doing domestic.
here's the question. Ive got a job in a Big detatched victorian house moving some sockets around. Sockets are mounted on skirting wired up via floor which is newly laid parque style and fancy coving so no chasing up or lifting floors. Customer does not want any blanking plates etc. Is it permissable to use either staggerd inline connectors/through crimps and heatshrink.
Customers has new board all RCBO circuits fitted during recent kitchen renovation.

new sockets will go on adjacent wall but will need to chase up a bit and across to new location. Again not ideal but does the RCBO cover as addition protection as not specifically in a wiring zone as original socket will be removed?

Hopefully I've made some sense.
thanks in advance all

 

[Aaron b]

I know more than I want to about this following an argument with a CPS.

BS5733 MF has a list of 10 tests for an assembly to be suitable for MF joints.
A crimp wouldn't comply, nor would any single connection device be it a wago, ideal connector, choc bloc, etc. as the standard includes strain relief for the cable, needing a tool to open, being marked MF and a load of other stuff.
That is why I say above that an ideal connector cannot possibly comply on it's own.

Wago, and now Ideal have jumped through all the hoops and their enclosures and connectors together comply with BS5733 MG if you follow their precise instructions.

Stop reading now if you don't like sarcasm.

Previously Wago boxes and connectors only met the standards below so obviously this was totally inadequate:
Mechanical Tests.

* Pull-Out Test to IEC/EN 60947-7-1, IEC/EN 60998-2-2, IEC/EN 60999-1

* Shock Test to IEC/EN 60068-2-27, 60068-2-30; Railway Applications IEC/EN 61373

* Vibration Test to IEC/EN 60068-2-6; Shipbuilding GL, LR, DNV; Railway Applications EN 61373

Electrical Tests

* Temperature-Rise Test to IEC/EN 60947-7-1, IEC/EN 60998-1, IEC/EN 1-61984

* Derating Curve to IEC/EN 60512-5-2

* Voltage Drop Test to IEC/EN 60947-7-1

* Short-Time Withstand Current Test (Short-Circuit Withstand Capacity) to IEC/EN 60947-7-1

* Insulation Parameters to IEC/EN 60664-1

* Power-Frequency Withstand Voltage Test to IEC/EN 60998-1

* Rated Impulse Withstand Voltage Test to IEC/EN 60664-1

* IP Ratings for Electrical Equipment to IEC/EN 60529

Material Tests

* Needle Flame Test to IEC/EN 60695-2-2

* Glow-Wire Test to IEC/EN 60998-1, IEC/EN 60695-2-11

Environmental Tests

* Temperature Cycling Test to IEC/EN 60947-7-1, IEC/EN 60998-2-2

* Industrial Atmospheres to EN ISO 6988, IEC 60068-2-42, IEC/EN 60068-2-60

* Salt Spray Test to IEC/EN 60068-2-11, Marine Applications GL, LR, DNV

* Quick Change of Temperature to IEC/EN 60068-2-14


You'll be glad to know that they have now passed the newer 10 point test so we can use them after all.

And how is a crimp or solder connection any less likely to be pulled apart whilst plastered in than a socket? A lot of this BS is trying to do the thinking for people and make money from it. I believe the wago boxes need to be installed in free air and fixed with the silly button thingy too.

 

[Lucien Nunes]

And how is a crimp or solder connection any less likely to be pulled apart whilst plastered in than a socket?

It's not just pulling apart. When cables are terminated within an enclosure e.g. the back box of an accessory, there should be some slack that allows for a bit of differential movement due to thermal cycling of the terminal and conductor. If the cable is rigidly plastered in directly up to the terminal, any thermal stresses are more likely to be transferred to contact surfaces and accelerate frettage corrosion.

There is indeed some BS in some of the products but the technology of terminals and connection methods is more complex than it looks and is not just manufacturers trying to fleece you. It's a field that I study because I need to make high-reliability connections. I don't like the MF specs as they are, but I can understand how and why they have evolved the way they have.

Re. crimps, many generic products are not made to any particular specs of any significance. They are just random bits of bent metal that work for Joe Bloggs to add a pair of aftermarket fog lamps to his car. Once you start digging through the detailed specs of the proper products from the likes of Klauke, AMP etc you start seeing the differences.