QTV #14 - Wago connectors, how do they compare?

[SeanB]

QTV #14 - Wago connectors, how do they compare?

https://www.youtube.com/watch?v=Ekh65Jx1Qc0

A somewhat hirsute Martin on mains connectors. Wiring up a 400W metal halide lamp, hopefully not for growing certain medicinal plants. The different types of mains rated connector, from the humble wire not to the screw terminal block, then onto the Wago connector system, both the non reusable and the reusable ones. A nice firm grip, and a very large range of wire sizes and types handled by a single connector.

Downside is the larger connector, but often usable in many applications.

Martin then goes and uses a LCR meter to compare the resistance of each connector, as opposed to the milliohm resistance of the plain wire.

The push in connectors have a higher resistance by a small amount, but not much over a plain wire.

The test will come with leaving them in a sealed space above a salt bath for 100 hours then redoing the testing, to see how exposure to a corrosive atmosphere affects the contact resistance.

[RobertoLG]

these lever connectors are really nice to make some temporary connections and definitive ones too, you always can reuse them if needed, nice video, lets just see what that light is for...hmmm medicinal plants growing??? ya right LOL

[Florian]

I have tested two Wago 222-413 connectors (out of different batches) with 1 A of dc current through them and got a bit different result.
With 0.75 mm^2 solid copper wire connected to the outer positions of the 3-way connector i measured a resistance of 0.55 mΩ to 0.57 mΩ. Thats the resistance of the Wago connector plus 2 times the short distance of solid copper wire.
For comparison a terminal strip (like the white connector Martin tested) gave me a resistance of 0.56 mΩ with the same copper wire clamped tightly.
So in my tests with 1 A current flow there were no differences besides measurement errors. But since i used the same equipment in all the tests they should be comparable.
BTW the Wago 221 series is smaller than the 222 series so it's the better choice for cramped spaces with the same specs.