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Have the peace of mind your power connection will always be safe
Keeping you safe while on holidays
Testing the polarity of the power source you are connecting to is a requirement not only because it's stipulated officially, it is also the only safe thing to do.
The bottom line is, you don't know what you are plugging into. ESHORE will test automatically and will prevent you from operating if the polarity is wrong.
WHAT IS REVERSE POLARITY AND HOW DOES IT OCCUR?
At the Campsite
Quite simply reverse polarity is when the live and neutral wires are the wrong way around. The issue of having reversed polarity is to do with historic changes in wiring rules, wiring colours and these colours being different between UK and Europe. To complicate matters further, over time the earth wire was incorporated and also having a different colour for UK and Europe.
In practical terms when polarity is correct, when you use your toaster for example, and you switch it off at the switch, there is no power available through the live wire. If you turn it off by flipping the switch on a single pole circuit breaker, it still stops the current flowing down the live wire to all the sockets. You are safe.
Now, when these wires are reversed and if we use the example above there will be a problem. If we turn the toaster off and this time the switch is on the neutral or return path, (reversed), there will be power present on it. This is even when the toaster is turned off! This is an incredibly dangerous situation as there is potential for electrocution.
ESHORE will protect you from this as the device will lock you out if the polarity is wrong.
ESHORE performs this test automatically every time you connect to a new power source without fail.
Have a look at our video on Polarity
At the Marina
As with campsite power sources, the same issues happen when connecting to marina power. Along with the dangers of having voltage still running through your circuit even though you have turned appliances off, you have the added issue of galvanic corrosion, if no galvanic isolator is fitted, and can happen when a continual monitoring polarity testing device is used instead of ESHORE. The damage can happen very quickly not only to your boat but your neighbour's boat also,
A more dangerous situation can arise from reversed polarity and that is Electric Shock Drownings. This happens when swimmers are exposed to electric currents in the water and occurs when the protective earth cable is open circuited (e.g. If you have a non-fail safe galvanic isolator), an electric path can be introduced through the water. Electric shock drownings occur most often in fresh-water, which is conductive due to dissolved minerals and impurities. The increased conductivity of saltwater reduces the fraction of the electric current that flows through a submerged person, whose body has a much smaller conductivity than the saltwater.
ESHORE will prevent this from happening along with preventing corrosion and electrocution through reversed polarity.
Watch our video on connecting to marina power
Copyright © 2023 ESHORE The Safest Polaritry Testing Device - All Rights Reserved.
Mark Smith CEng, CMarEng, FIMarEST, BAppSc(MarEng)
Engineering Surveyor
Accredited Marine Surveyor: AMSA – 3242-6148 4
Qld EC lic. 73995
Authorised Maritime NZ Surveyor – SRV242
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