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Oilman, it's not what you said that I have a problem with, it's the sarcasm that accompanied your statements. I know full well that cold water comes directly from the mains, but few people still use a 30 year old instantaneous boiler to heat all their hot water, with no storage. I understand...

I was hoping for some help from somebody with a brain... better find a better board. If the first two posters need help with comprehension skills, I suggest a course at your local college.

I am helping a friend install a shower - but he has a weird system. His cold water comes off the mains, and his hot is fed directly from an instantaneous water heater with no tank for storage. I suggested an instantaneous electric shower which only requires cold water, but in the summer the...

Yesterday I was adding some supplementary earth bonding to the shower switch in my bathroom, and discovered that the end of the supply live wire had blackened and partly melted the terminal in the switch. The shower is 7.5Kw, 18m from the consumer unit. It is cabled with 6mm, protected by a...

The CU is an old Wylex with push in type re-wireable fuses - apart from the shower fuse which is a push-in MCB. Can you get push in RCBO's - I thought they were all DIN rail mountable types now? Oh, and I read about the RCD in some DIY manual, although looking back over the instructions for the...

I would be grateful for some help on this topic. A few years ago I installed an electric shower, but recently I have read that the circuit should be protected with an RCD. At present, it is simply protected by a 40A MCB. I found a separate shower CU at Screwfix, but am dubious about how it...