Recent content by C15JON

Having spent a couple of years writing technical exam questions, I can assure you it's not an easy thing to do.

Welcome!

I take your point, @Geoff1946, nicely explained. I need to go sit in a dark room with a damp flannel over my face and think about this because I"ve seen it happen...

RCD (Residual Current Device) devices are designed to monitor the balance of current flowing through live and neutral conductors in a circuit. When a fault occurs, such as a neutral-to-earth fault, it creates an imbalance in the currents between the live and neutral conductors. In a properly...

With respect, you are wrong. RCDs trip quite happily on neutral to earth leakage. You can prove this quite simply in the home!

Useful link, thanks for sharing!

Okay - please educate me why this is?

Yes. The fact that some sockets are protected by RCD means the live feeds of those protected circuits are cut through the RCD, correct? The neutrals and earths are all connected to the same busbars - this applies for every circuit, correct? So a neutral to earth fault on any circuit will be...

That’s irrelevant. We’re not talking about the live, just the earth and neutral. Any earth-neutral connection will be sensed by the RCD, regardless of how the live connection of any particular circuit is wired.

Neutral to earth low resistance will cause imbalance and trip RCD because the neutrals and CPCs are common to all your circuits presumably.

MoD Electronics Technician Apprentice many years ago. Spent most of career as a railway signal engineer. Always loved electrical work and have rewired whole houses twice over the years. Now studying for C&G exams to get qualified. Passed 2382-622 last week and currently studying for Part P. Plan...