2006年1月12日 · It used to be HPF=high power factor, LPF=low power factor. Multiple LPF fittings tend to flicker and have a bad power factor. HPF fittings tend to go boom when used on a small generator as the power factor capacitor can cause instability in the generator. Most good fittings these days are HPF and available in HF or switch start.

2007年4月19日 · LPF: Low Power Factor HPF: High Power Factor HF: High Frequency As you say, if it's one or 2 lamps LPF won't make that much difference. Lots of LPF lamps will effect the overall site power factor. This has 2 problems 1) Low power factor means that everything operates less efficiently and costs more to run 2) Electricity companies start to charge extra for poor power factor figures Hope this helps

2006年1月14日 · The LPF are for domestic only because they consume over twice as much current as the HPF ones & you might trip your mcbs. Electricians should read the preliminary part L, supposed to come into operation later this year.

2025年1月16日 · Hi folks, I’m trying to replace an old Manrose extractor fan with a newer model I got from Screwfix (MG100T). For all practical purposes, it seems very much like a straight, like-for-like swap, but once I wire the new fan, it does not turn on. …

2024年11月15日 · Hi, we’re planning to replace a floor-to-ceiling window with a standard-sized one, and add brickwork underneath. Once the brickwork is in place, we'll have 170mm of space for insulation, plasterboard, etc. Since we can only have a single-skin wall, could anyone recommend the best approach to...

2024年5月23日 · has anyone else tried the paint yet, I've tested it out and was well impressed... give it a go.

2025年2月5日 · No sarcasm, unkind or rude comments please. What is the general opinion on Type AC RCD or RCBO. What code is appropriate for EICR purposes? Some say C2, others say C3. I appreciate the discussion. I do understand that an emersion heater which has no electronic components to cause any DC leakage...

2019年1月18日 · I believe there are two widely available plasterboard edge types i.e square and tapered. For ceiling plasterboard, which would consequently be plastered over, does it matter if the plasterboard is square or tapered? I was thinking of getting some sound resistant plasterboard for a bedroom as...

2024年12月9日 · Hi, I am looking at boarding up the loft. What is the best way to suspend loft flooring? Legs or timber? I am getting conflicted opinions onlline. Looks like I will go for timber.

2024年10月10日 · I wish to install an extractor fan to the downstairs toilet, and want to double check my plans Currently there is a pendant light/ceiling rose, and a light switch just outside the door The fan is timed and requires a 3 amp fuse. The lighting circuit has a 5 amp MCB Is this correct? Add fuse...