superheat6k
Well-Known Member
I was trying to stop someone killing themselves. Sometimes being blunt is the best way to help, and I was the only one advising from what I had read that the OP did not understand what he was about.Far to kind
As it happens I know exactly what I'm doing inside a 240v box and a 12v DC box.
My reference to the presumably positive was to the RED CABLE as this would normally be positive. I haven't done a full trace back yet, but at first glance it appears that this is the positive cable connected to a N terminal, though it's difficult to see until I can get to the top of the RCD to look.
The black 2 core is to a polarity indicator light. That comes off the input side of the RCD, so you can check polarity before switching on.
The output cables seem to follow the red / black connections logically, so it would indicate red is indeed positive, but some ( insert appropriate word ) has done a rather poor job of wiring this up.
I will be investigating further, belling out the connections to the shore power inlet to make sure the colours are correct, and then rewiring this monstrosity properly.
The OP response here still does not give me any confidence at all he does understand AC power.
How does a polarity indicator work on an AC supply ? (although I accept there is a widely mis understood concept of 'Polarity' as far as AC is concerned meaning: is the shore power supply live conductor at the boat end actually connected to the shore neutral, and vice versa - normally via a neon so if 240v Live appears on the Neutral conductor to Ground / Earth at the boat end the lamp illuminates indicating a connection reversal either in the shore power line or shore connection point.)
To clarify there is no 'Positive' inside an AC connection box.
N within an AC connection box does not ever mean negative.
