PocketAces
Veteran Member
- Joined
- Dec 25, 2019
- Messages
- 45
- Location
- Canada
- Vessel Name
- Pocket Aces
- Vessel Make
- Mainship 34T '08
gkesden: Thanks again. That is a good explanation of how a transformer works and reminds my of my old physics classes many years ago
Presumably if I turn off everything and disconnect from shore power and then check the resistance from the shore power cable (where disconnected from shore power) to any of the earthings of any plug in the boat, I will get a high resistance if there is no direct connection and a low resistance if there is a physical connection for the earth line.
re the 1V passing through the isolation transformer, I would have thought that if the transformer windings can pass 120V via the Neutral and Hot, they might be able to pass 1V between Neutral and Earth. But thinking more on this there are no windings for the earth so no inductance.
I will measure for Neutral/Earth voltage when powered from DC as you suggest and also watch the voltage on the house bank while using AC to heat some water. If the Inverter uses some DC power, then I would see some drop of the House bank voltage.
What I cannot figure is if the Earth on the boat is physically connected to the Neutral on the boat (as you allude above), then how could you build up 1V without a short circuit and sparks etc? (Quote: "the grounding conductor on the boat is tied to the white wire on the boat)"
I'll let you know the next set of measurements!
Presumably if I turn off everything and disconnect from shore power and then check the resistance from the shore power cable (where disconnected from shore power) to any of the earthings of any plug in the boat, I will get a high resistance if there is no direct connection and a low resistance if there is a physical connection for the earth line.
re the 1V passing through the isolation transformer, I would have thought that if the transformer windings can pass 120V via the Neutral and Hot, they might be able to pass 1V between Neutral and Earth. But thinking more on this there are no windings for the earth so no inductance.
I will measure for Neutral/Earth voltage when powered from DC as you suggest and also watch the voltage on the house bank while using AC to heat some water. If the Inverter uses some DC power, then I would see some drop of the House bank voltage.
What I cannot figure is if the Earth on the boat is physically connected to the Neutral on the boat (as you allude above), then how could you build up 1V without a short circuit and sparks etc? (Quote: "the grounding conductor on the boat is tied to the white wire on the boat)"
I'll let you know the next set of measurements!