Guess the fault

[p11jor]

Had a call out late last night, everytime the shower comes in it's blows the whole house.

The set up of the board is duel rcd. 2 mcb either side.

Cooker/shower on left

Lights/sockets on right



So the power to the shower switch is fine, again this can function fine and send power to the shower, bit as soon as the shower is pressed is wipes both rcds straight out after 2seconds.

I did a insulation resistance test, was getting 0.25megohms.
Removed tge switch and was getting 459megohms. So thought new switch, put new switch on and still wiping the whole board out, but obviously were not getting a dead short as the power to the shower is fine untill pressed.

Quite interesting this one. But such a obvious one which I will always look out for on my future PIRs

 

[p11jor]

Akabarthesta I didn't buy, nor fit the board, I'm just the guy who was called to sort the issue.

Also the nuetrals were fine, it's the live that was tge problem with the arc from the bus bar.

 

[telectrix]

having given the matter considerable thought, i think an analogy would best explain the phenomenon, something similar to comparing electricals with water. the pressure is the voltage or potential difference, and the flow is current or electron movement.

so... say that the one busbar is the entrance to harrods, and the other to harvey nicholls. the current ( women shoppers ) moving in and out of both entrances is steady and continuous. now : harrods announce a sale. ( switching the shower on ). suddenly the flow of electrons through harrods door becomes a mad rush, and seeing this, the women ( electrons) going into harvey nicholls sees the rush and jump across to the harrods entrance. this causes a massive inbalance in both sets of customer ( electron) flow causing the revolving doors to come off their hinges ( RCD s trip).

hope the above clarifies the situation.

 

[Octopus]

having given the matter considerable thought, i think an analogy would best explain the phenomenon, something similar to comparing electricals with water. the pressure is the voltage or potential difference, and the flow is current or electron movement.

so... say that the one busbar is the entrance to harrods, and the other to harvey nicholls. the current ( women shoppers ) moving in and out of both entrances is steady and continuous. now : harrods announce a sale. ( switching the shower on ). suddenly the flow of electrons through harrods door becomes a mad rush, and seeing this, the women ( electrons) going into harvey nicholls sees the rush and jump across to the harrods entrance. this causes a massive inbalance in both sets of customer ( electron) flow causing the revolving doors to come off their hinges ( RCD s trip).

hope the above clarifies the situation.

Gosh, things must be going well in Cheshire if Harrods and Harvey Nichols are at the fore front of your mind! LOL

 

[ackbarthestar]

having given the matter considerable thought, i think an analogy would best explain the phenomenon, something similar to comparing electricals with water. the pressure is the voltage or potential difference, and the flow is current or electron movement.

so... say that the one busbar is the entrance to harrods, and the other to harvey nicholls. the current ( women shoppers ) moving in and out of both entrances is steady and continuous. now : harrods announce a sale. ( switching the shower on ). suddenly the flow of electrons through harrods door becomes a mad rush, and seeing this, the women ( electrons) going into harvey nicholls sees the rush and jump across to the harrods entrance. this causes a massive inbalance in both sets of customer ( electron) flow causing the revolving doors to come off their hinges ( RCD s trip).

hope the above clarifies the situation.

Not if they have just popped out from Ascot to load up with extra shampoo (resistance to current flow caused by large brimmed hats and the blocked revolving doors) :alucard: :jester: :indian_chief: arty: