Jonnyboy 68
Junior Member
- Joined
- Apr 25, 2010
- Messages
- 26
- Reaction score
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Hi All..
Just got back from answering a cry for help from my new neighbour round the corner who's been sitting in darkness. They've been there for about a month now with no probs. House was supposedly re-wired before they bought it with new 17th ed board. There is a EIC, but only covering the board installation. 2 RCD's 6 circuits each , 1 keeps tripping out. In my PJ's with torch in hand .. I've had 30mins on it and I've narrowed it down to the cooker circuit. RCD is happy until the cooker is turned on at the cooker switch. Do nothing.. Give it about 15 secs .. and the RCD trips. House is TT, Ze 21.8 ohms.. R1+R2 0.18 ohms Insulation is good ....Tested RCD.. ramp test and 1/2, 1 and 5 X and all looks OK ?? Ive left the cooker circuit off for now and the RCD is a Happy Bunny again.. I'll pop back tomorrow when I've had some kip and have a proper dig about..... I'm a bit puzzled by the pause before it the RCD trips ??? you can almost set ur watch by it.. Any ideas ??
Just got back from answering a cry for help from my new neighbour round the corner who's been sitting in darkness. They've been there for about a month now with no probs. House was supposedly re-wired before they bought it with new 17th ed board. There is a EIC, but only covering the board installation. 2 RCD's 6 circuits each , 1 keeps tripping out. In my PJ's with torch in hand .. I've had 30mins on it and I've narrowed it down to the cooker circuit. RCD is happy until the cooker is turned on at the cooker switch. Do nothing.. Give it about 15 secs .. and the RCD trips. House is TT, Ze 21.8 ohms.. R1+R2 0.18 ohms Insulation is good ....Tested RCD.. ramp test and 1/2, 1 and 5 X and all looks OK ?? Ive left the cooker circuit off for now and the RCD is a Happy Bunny again.. I'll pop back tomorrow when I've had some kip and have a proper dig about..... I'm a bit puzzled by the pause before it the RCD trips ??? you can almost set ur watch by it.. Any ideas ??