My oven keeps tripping my RCD?

Question

Hi guys, new build home split load, Electric oven is not on the RCD side but half the time i tun the oven off it trips the RCD, its a nigthmare.. I know the 10mm cable that runs to the oven is at one point running through the same hole in a joist with a couple of lighting circuit wires, can the oven be generating a spike on the cable that is taking out the RCD via the lighting cable? is it more likely that the oven is faulty?

many thanks for any feedback on this..

Sparky

Answer 1

Your not here, huh? Your there, but, it all works the same, except,I have no idea what an RCD is.? I think we call them GFI's. Anyway, I really doubt that a spike  is the culprit, rather an arc. You say when you turn the oven "off" it trips,if your RCD's work like our GFI's, it measures the current going to the load, against the current coming back, if there's more than 5 ma. difference it thinks there's a fault,and does its job, and trips.

We have the same problem with refrigerators here, when the motor shuts off, it causes an inductive kick, that trips them.

Now, does it trip when its on, and cycling the heating element, (to regulate temp.) or when you physically turn off the switch? What I'm getting at is, when you turn it off at the switch,and the heating element is under load, the contacts in the switch arc, and when that happens a small amount of metal vaporizes, and produces a conductive film around the inside of the switch, now this film can conduct enough current to ground(from the arc) to trip your RCD. And the times it doesn't trip, the element isn't under load when you turn it off.

Make sense?

Now I got a question for you. Since your guys's stuff runs on ~220v., do your ovens run at ~480v.? Cause here our stuff runs on110v., but our ovens run at 220v.

Anyway, check the switch before you,spend a bunch on a new oven.

good luck.

Answer 2

So your oven be....trippin'?

Wow >.> that was terrible.

Answer 3

you say it trips when you turn oven off? sounds like power surge prob. Only way to sort it, is to get electrician in to check rcd for neutral surge. good luck.