Hello,
I recently had electrics for a new garden office installed. A new consumer unit was installed in the original house plus a consumer unit in the garden office. I was told this would provide me with sufficient power to run a heater, office equipment, lighting and also supply 32a for a hot tub if we were to install one in the future.
I am finding that the fuse for the garden room in the consumer unit in the house keeps tripping when I run a 3kw heater plus my computer bits which add to a further 200w so about 15a max. Any ideas why this might be? When I spoke to the electrician he said that because the consumer unit was rated at 40a it could overload and suggested uprating it. However my 15a is way under this, could anything else be causing it to trip? I have tested all the appliances and they are fine - it trips with 2 different heaters. Would water cause this problem? The room is a little damp at present but the tripping does seem to occur when the appliances have been on for about 30 minutes.
Any advice would be much appreciated, I am sitting in 8 degrees cold at present as I am too scared to but my heater on!