i have switched off all appliances ang switched on one at time.when fridge is off nothing trips.when it is on it only trips when i put on another aplliance.the fridge works fine on its own though.could it be the fridge or faulty rcd switch??
2007-04-23 07:41:24 · 7 answers · asked by kresan g 1 in Home & Garden ➔ Maintenance & Repairs
The ONLY way to find out is to do an insulation test on your appliances and the wiring to the circuits supplied by the RCD. Any leakage totalling to about 30ma. will trip the rcd. This equates to 8000ohms insulation resistance. The lowest limit is 0.5Megohm (500000 ohms), but should be in the order of at least a few hundred megohms.
There may be 20ma from the fridge and ok but another appliance may add 20ma more, which will trip. I have traced and corrected these type of faults hundreds of times. If there is leakage in the wiring the ONLY way to trace it, is to disconnect all feeds and neutrals and check each with a megger at 500 volts, otherwise you will be at it for weeks!! It is unlikely to be a faulty RCD, but it can be tested also, with the correct instrument.
2007-04-23 12:13:38 · answer #1 · answered by jayktee96 7 · 2⤊ 0⤋
I take it you do mean rcd and not mcb ? if it is the rcd tripping you probably have a faulty fridge , the reason the rcd only trips when another appliance is plugged in (a class 1 appliance),is because the current the fridge is returning via the earth is insufficient to trip the rcd on its own ,but with another appliance plugged in this pushes the rcd over the limit (30 m/a)and hence trips out .i.e the fridge has a neutral to earth fault , or less unlikely a phase to earth fault.
2007-04-23 08:02:56 · answer #2 · answered by birdmanofalkatraz17 1 · 1⤊ 0⤋
First thing to do is to call a local electrician with the latest test equipment to test both Your RCD and your wiring.
A rcd tester will determine whether the rcd is tripping in the correct time.
A rcd ramp test will determine if the rcd is tripping at the correct leakage.
An insulation tester is used for testing the wiring.
If these tests are ok then it must be an appliance leaking current.
Most likely it is the fridge and these kind of appliances are notorious for tripping RCD's.
Birdman and jayktee are correct , ignore the other one.
2007-04-24 00:57:59 · answer #3 · answered by robert22061954 3 · 1⤊ 0⤋
Rcd Trip Switch
2016-10-16 06:27:33 · answer #4 · answered by ? 4 · 0⤊ 0⤋
Do you have a single 30 ma RCD protecting the whole installation? RCDs will trip for no apparent reason when protecting lots of circuits/wiring and mutiple protection using different value RCDs to protect different circuits is a better way you need to speak to your local approved contractor about this.
The fact that this has started tripping suddenly does sound like a neutral earth fault and again you need a sparky to find it for you.
2007-04-26 09:45:39 · answer #5 · answered by rapid 2 · 0⤊ 0⤋
Get an electrician to do a PAT test ( portable appliance test) on your appliances. Also the circuit will need to be tested in case the fault may be there
2007-04-24 04:38:50 · answer #6 · answered by Glenn M 4 · 0⤊ 0⤋
You are overloading the circuit switching both on at the same time..
2007-04-23 07:46:20 · answer #7 · answered by Anonymous · 0⤊ 5⤋