Panel 302 L and N issue

[elias]

Hi to all , recently had issues with water heater tripping the main switch. The panel diagram suggests L AND N us in picture . But the actual setup from the factory has the N in place of L or I am mistaken ?

[Yngmar]

Water heating popping your RCD is almost always because the heating element has corroded through and needs replacing. So you're almost certainly looking in the entirely wrong place.

[elias]

Yes yes , I have already ordered a new one , but I was getting even with the heater unplugged and the switch off voltage between N and E at the plug so I opened the case to check everything . The mystery for me is that the diagram suggests L and N the opposite way, so I think that the heater switch is cutting the neutral not the load ?

[Diverphil1]

id that a diagram of the plug or the socket side of things, reason i ask is you could be looking at it from the wrong side, I've seen many truck 7 pin connectors done back to front when apprentice has had a go for the first time.
that would explain the wiring looking back to front to the drawing ?

I've just looked at the photo and diagram, its correct, brown is live.

[Diverphil1]

Yes yes , I have already ordered a new one , but I was getting even with the heater unplugged and the switch off voltage between N and E at the plug so I opened the case to check everything . The mystery for me is that the diagram suggests L and N the opposite way, so I think that the heater switch is cutting the neutral not the load ?

don't forget its 240vAC not DC , you will get voltage showing between n +e as its fed from both N and L in an oscillating current  so there is no pos and neg as in a 12vDC system
apologies if you already know this, its just to maybe stop you getting a bit of a shock from it.

[elias]

Hi , I changed the photo to compare easier
This is the rear view currently on my boat , brown ( L) is on the left hand and blue (N) on the right as you look from the rear view.
On the manual specifies rear view of the panel ( as you see it matches , 2 plugs on the top , 4 in the middle, 3 in the bottom) and has the N on the left hand side . If then I k not mistaken , the switch is switching the neutral not the load as it should .