- Joined
- 2 Mar 2006
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Had a split load cu fitted last year and had the sparky connect my 9.5Kw shower to a 40A mcb protected along with the ring circuits by a Siemens 80A RCCB. The 10mm cable run is about 9m...totally free the whole run as I've not decorated the middle floor room it runs through. A few months ago I got occasional nuisance tripping of the RCCB when the isolator switch was turned off after the kids had showered. Things have worsened and I now get RCCB tripping maybe one time in four when the shower itself is turned off. I've tightened all of the connection in the circuit though none were loose, and there's no moisture inside the unit. Any ideas ?? Last time it tripped noticed there was some condensation on the tiled walls/outside of the isolator switch which is in the corner of the bathroom.....it's a sloping roof in the bathroom at the top of the house and not particularly warm at 0700 in the morning...... I can't convince the kids to open the Velux and leave the door open. I can get access to a mega/eath leakage tester.