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Preventing electrical failures…

How many of you have these connectors on board ?..

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How many times have I seen so called professional marine electricians using this type of terminal block….Pitiful isn’t it !

 

 

 

 

There are so many type of electrical connector – all claiming to be for marine use ….

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imageThe ML-XT Sealed Connection System by Molex claims to be the best sealed system in the market today, preventing electrical failures in critical wiring applications. Premium grade liquid silicone rubber (LSR) material ensures the ML-XT connector system meets J2030 requirements for advanced sealing. The thermoplastic plug housing forms a covalent bond with the LSR seal, resulting in an extremely strong interlock which prevents fluid ingress and seal loss or misalignment, even through repeated mating and unmating. ML-XT connectors offer a better seal design and a better rating (IP69K), and are drop-in replacements for other industry standard connectors currently available.

Heat shrink v Don’t Heat shrink…

There are so many pieces of advice on how to seal wires on a boat …

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Will you be sealing moisture in?.. will the end allow water ingress and corrosion? Have you twisted the wire tempting strands to fail?… have you taken into account the surface conductivity property?

Probably the best method to join two wires is the solder splice type of connector with both solder and heat shrink techniques applied at once plus adhesive to stop water/humidity ingress…

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If you are using non-tinned bare copper wire don’t twist the stranded wires together…. try to push each bunch of strands into each other so that as many surfaces are in contact as possible from each cable. This is because of the strange property of electrons to try and travel mostly at the outer surface of any given cable….

Tinned v Not Tinned copper wire ….

Then there is the debate on whether to use tinned or not tinned…

On the lab bench and under ideal circumstances, bare copper is going to outperform the `tinned’ variety. It isn’t quite that easy. If it was, we would be done, end of discussion. However, you can’t have an “age old argument” if the situation was straightforward can you? I have experienced different results than the lab testing would suggest. My own testing has proven both types of copper can be right if you add in the missing variable…time. Fresh, new, bare copper conductor works great. Unfortunately, I have found that it will oxidize much more quickly than the tinned variety which leads to a degradation in electrical performance.…

To the naked eye, a copper conductor may appear to be smooth and uniform, however microscopic pits and cracks still exist and moisture can easily penetrate these imperfections. The hydrogen atoms present in the water vapour will combine with other elements to form acids which eventually cause even more metal to be exposed by enlarging the imperfections in the base metal. It gets even worse when sodium is present as in the case of salt water. Sodium accelerates the chemical reaction that forms the destructive oxide compound. As more of these atoms combine they weaken the integrity of the original metal making it brittle and crumbly, a process commonly known as corrosion.so in practice use tinned – if you can afford it !

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Power Line Instruction (PLI)

Lumitec is a product development company focused on the conceptualization, development, and manufacture of extreme environment LED lighting. Their research and development facility located in Delray Beach, Florida has come up with an innovative, proprietary communication protocol called Power Line Instruction (PLI).

Power Line Instruction (PLI) is used to send control/configuration instructions to Lumitec luminaires over the standard power wires.

These instructions control the luminaire’s inherent behaviour. The protocol is executed over the basic 2-wire Powerline connections to the luminaire.

Behaviours such as brightness, color, color mixing, flashing sequences are some examples of control instructions. Luminaires can

…….Click Power Line Instruction (PLI) …. to continue reading

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Digital Yacht 4G Connect delivers fast 4G/LTE internet access afloat

 

Digital Yacht will launch their new 4G Connect 2G/3G/4G (LTE) internet access solution at METS 2017. 

Digital Yacht's 4G Connect Pro system ships with 2 external antennas for exceptionally fast LTE access

It appeals to any boat or ship looking for extended and fast 4G internet coverage afloat.

IDigital Yacht's 4G Connect Pro system ships with 2 external antennas for exceptionally fast LTE access utilises the latest MIMO technology with dual antennas for fast, long range access and incorporates a full function wifi router so multiple devices can connect

…….Click Digital Yacht 4G Connect delivers fast 4G/LTE internet access afloat …. to continue reading

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Sailboat vs Trawler Anchoring ..

Jeff Seigel, founder of ActiveCaptain, writes…

As we pulled into the anchorage north of the Lake Worth inlet this week, in our trawler Red Head, we found ourselves in a sea of sailboats. It made us realize some of the issues to think about when picking a spot for both sailboats and trawlers especially when both types of vessels are in the same area.

There are a couple of things that might not be obvious about anchoring but are critical to careful planning. First, the amount of rode you let out after

…….Click Sailboat vs Trawler Anchoring .. …. to continue reading

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Headsets – The Next Generation…

Jeff Seigel, founder of ActiveCaptain, writes…

For years, we've talked about the advantages of cruising couples using headsets for communications. There is no substitute. While hand signals may work in many conditions, we've found good communications is most needed when both hands are busy. And nothing compares to the ability to calmly and reliably talk between crew members while docking, anchoring, and during other maneuvers. In stressful situations, great communications removes much of the stress.

We bought our first headsets, the original toy models, in 2003. They became so important, we bought a second

…….Click Headsets – The Next Generation… …. to continue reading

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