PabloPicasso
Well-Known Member
Anyone know the correct Wago connector for the tiny data wires on a Garmin plotter?
I have found these 261 blocks excellent for fine instrument wires in dry locations - also available in 4, 6 and 8 way blocks too, IIRC, and strong sprung closures so ideal for fine wires and awkward places. https://uk.rs-online.com/web/p/non-fused-terminal-blocks/0815852/
I've got a couple of those in my parts bin, not sure where from, but they do indeed look good for NMEA0183 wiring and suchlike. They can be clicked together to make up strips of any length.
FWIW the guys in the electrical production bay downstairs from my office would insist on crimped-on ferrules on each wire going into such a block
Pete
though I agree bootlace ferrules would be the ideal, I have found the grip on very fine instrument wires (not subject to strain) excellent without them.
I am not convinced about using Wago blocks for signal wires - the do have a minimum specified wire size and I suspect that many data wires are thinner than that.
I also think the side-by-side style make them bulky when trying to make several connections
I have some of the 261 blocks. They take quite a lot if squeeze to open, I use a mole grip.
IIRC they're nickel plated, and though I agree bootlace ferrules would be the ideal, I have found the grip on very fine instrument wires (not subject to strain) excellent without them.
I run a controls business which has used cage clamp screw less connections on a lot of major components for over 15 years. We have been advised by all manufacturers not to use bootlace ferrules on this type of terminal for the recommended gauges of wires that they are approved. Using boot lace ferrules creates a highly loaded point of conduction in the clamp. This both reduces the current carrying capacity and potentially increase the chance of a poor contact if oxidised. Cage clamp terminals are designed to encourage wrap of the stripped bare cables around the internal clamp contact. This increases the contact area considerably.
Eliminating ferrules helps towards building a control panel considerably quicker. You don't faff around with picking up a crimping tool, fitting a bootlace ferrule (without twisting the wires) and crimping each and every cable end is incredibly time consuming and unnecessary.
Most good cage clamp terminals are simply opened by slipping in a screw driver of the right size to open the clamp. I cant think why one would choose some that need mole grips! Inserting a stripped cable is easy and connection is guaranteed without the need for checking tightening torque of screws.
Screw connections should always have boot lace terminations and is a requirement within our build specification. They also need checking after a day or so as very often the connected materials creep and the torque of the screw connection needs a tweak.
We have been advised by all manufacturers not to use bootlace ferrules on this type of terminal for the recommended gauges of wires that they are approved. Using boot lace ferrules creates a highly loaded point of conduction in the clamp.
They're designed to be poked with a flat-bladed screwdriver, which works fine for me. Surely you can't get mole grips around them when they're screwed to a mounting surface?
Pete
For the wires of my Nexus/Garmin instruments I have used properly crimped 0.5mm bootlace ferrules and have never had any problems in the six years since I installed them.