Reverse polarity indicator

It is suggested that the reader be . When polarity is incorrect or reversed , it is because the hot and neutral wires are switched. Without an indicator light you will not know when this condition exists because your electrical system still works normally. Technical article from Blue Sea Systems. This safety circuit is ideal for certain types of transformerless power supplies, triac .

You must also remember that even if your boat is wired correctly, the shorepower pedestal may not be.

So what happens if polarity is reversed ?

Therefore, in DC, it can only turn on LED 1. AC , however, conducts current in both directions. This is because AC voltage constantly switches its polarity back and forth, from positive to . You will not often see this reverse polarity light glowing on your panel, and if it does you should pay attention to it. Reverse Polarity is nothing to do with your compass pointing in the wrong direction! In the little diagram above the indicator light is connected to the incoming neutral wire, and . The black wire is “hot” and supplies line power.

Finally, there are branch circuit breakers and the devices that consume power, the “electrical loads”, either hardwired or plugged into . The quality of marina wiring can vary greatly from place to place and from plug to plug. I deleted that page from my website while doing updates. When your boat is plugged into shore power, stray current corrosion—caused by badly insulated shore power supplies and defective wiring on other peoples boats—can rapidly destroy your anodes and do costly damage to your boats underwater metals. Enter GalvanAlert—the worlds only shore power . In the last issue, we looked at the advantages of balanced and continuous dial indicators.

The counterclockwise dial can have the same characteristics as the balanced or continuous dial—except that it is reversed. Unplugged from our outlet on the pedestal, and plugged into our neighbors outlets on the same pedestal and got no alarm. Plugged in to outlets on the pedestal for the slip across the dock, and got no alarm.

This invention is related to polarity indicators for battery chargers and booster cables. In the case of battery chargers, an improper connection can .