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I have a 5-year-old Worcester Bosch boiler which I have to re-pressurise almost every day. I have two questions: 1) why does the pressure drop - where does the water go? 2) have you any idea what might be wrong with my boiler that its pressure drops so often? Thanks in advance.

Sorry for jumping in here, but I have the same problem. I've just stuck a spirit level on my waste pipe and found that it the plumber laid it just off horizontal (the bubble in the level is only slightly off centre). How much fall in the waste pipe do you recommend?

I've recently moved into an old house which has less aged wiring. It is a 200 year old country house which was split into three dwelling places back in the 50s. The fuse box is quite new and the cables I have seen look fine. However, occasionally the lights in the whole house will go dim...

Thanks very much for your reply. That makes perfect sense. I take it that you can spur from a spur if everything contains the correct fuse, but you can't spur from an unfused spur. Thanks again.

Hello, I have a query about the combination of a fused spur and a trailing socket. Please let me know if I am mistaken in anything below. Any replies will be much appreciated. 1) A fused spur is the same as a trailing socket as far as the electrical connections are concerned. The only...

An electrical appliance at work stopped functioning the other day. We opened the plug to find that the fuse had popped. The appliance was left to one side (in the designated area for such things) and we decided to reschedule that part of the job until later in the day, while the appliance was...

Thanks for your reply, but I don't think so. The downlighters in question are mains voltage. Everything I'm considering is for ~230V.

Yes, I am talking about pendants, but could not think of the word. Thank you for your reply. Pendant fittings are non-metallic so don't require an earth - fair enough, but what about the cable itself (which in the case of joining downlighters, or indeed the lighting ring itself, must be...

Thanks very much. One more question though, if the cable is required to have a continuous earth, why doesn't the flex leading to an individual light bulb (i.e the bit you see dangling from the ceiling - I'm not referring to downlights here) need to be earthed? I realise that such a length of...

Thank you. That's fair enough and very clear. However, as a 3-core cable runs from light one light two, and then a second three core cable runs from light two to light three, etc, what is the simplest, acceptable way to connect the CPCs? By the way, this is all very interesting and helpful.

Thanks very much for the reply. So there's no rule preventing the use of flex, provided it can take the current? I didn't realise the earthing requirement for the cable. The lights themselves have no earth connection. Why does the cable require an earth line running from the junction box...

Perhaps I should have mentioned that the lamps in question operate at mains voltage (~230 V), whence a power of 300 Watts (6 x 50) corresponds to 300/230=1.3 Amps drawn (in the absence of resistance in the cables). Obviously the resistance in the cables will have the effect of reducing the 230...

Hello everyone. When wiring up six (50 Watts each) halogen downlighters, is the type of cable used important? Can you use flex? Can you use 2mm^2 cable? I guess it's all to do with current limits i.e. 6 x 50 W draws about 1.3 Amps. I don't know the limit on flex, but 1.3 Amps sounds ok...

Thanks. I'm at work just now, but will look for the model number and try to get a picture up later.

Sorry for the topic title, but I don't know the proper name for the part. In my airing cupboard, I have a pipe going to the HW tank and another heading off to the radiators (I assume), both being fed by a pipe coming from the pump, making a T-junction. On top of this T is an electrically...

Thanks very much. Very helpful.

Thank you very much for your replies. That clears up the matter and sets me at ease. Bonding, not earthing; I'll take that on board, but I'm not sure I understand the difference. The electrical supply in the house is earthed, i.e. connected to the (relatively) fixed potential of 'the...

I recently laid a new wooden floor in my lounge and was amazed to find out just how far away from right angles some of my corners are. For example, measuring from a wall to one side of the door on the opposite wall, 386 cm. From the wall to the other side of the door, 383 cm. So, in the space...

Sorry for mis-posting and thanks for the link, which I had read. Please correct me if I'm wrong, but it confirms that where plastic pipework is present, radiators do not require earthing, so I needn't worry about earthing the new towel radiator. If that is the case, why did the people who...

Hello. I've just replaced a standard radiator in my bathroom with a (non electric) centrally heated, metal towel radiator; you know, one of those ladder type things. My central heating system is fed by plastic pipes. Elsewhere on this forum I have read that if radiators are fed by plastic...