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Are you sure the pipe stat was not on the return pipe from the coil in the cylinder? The rate of heat transfer from the coil to the stored water will depend on the temperature gradient across the two, so if the water is coming back at x deg C, we can usually assume that the water in the cylinder...

I don't get why they went to the trouble of disabling the mechanism - why? what does it acheive? If thats the case, then asside from not being in line with manufacturer's instructions, then assuming there is a 60A fuse fitted to that new switchfuse then there is the potential to overload the...

Most laptop chargers are about that, most would probably be underpowered, but one from a gaming end laptop might be alright - Technology moves on at such a pace and laptops are limited in terms of upgradability, so you might be able to find one at a tip possibly? The other idea, is if you can...

Wrong way round mate, you are meant to have the detector above the ground and look for metal below it, not t'other way round. You don't get to keep any valuable items you find doing it your way :P

A lot of local authority buildings, schools especially, round here have it in, put in during the 1990, I think it was probably when they started accepting T&E in their commericial buildings and not inisiting on singles in containment, so it would pull down drops to accessories, etc. I knew it...

I always presumed that it would be because equipment itself should be fine with a 5% voltage drop, but when it comes to lighting, fluctuations in voltage can cause noticeable changes in lighting level that are distracting and annoying. I should imagine that these days with LED fittings and...

If you are running Leds directly from smooth DC there will be no flickering

Thanks for that... bit of silly question, but how do I update the firmware in it :s is there a USB port somewhere to plug it into a PC

And if it goes instantly with a loud bang, rather than after a number of seconds, you can assume its kicking out on the mag, for a B32 thats going to be at least 3x32A = 96A. So say 100A and do a quick *** packet caluclation, You've got a resistance thats 2.3ohms or below, which is a lot lower...

I liked the hands free loop tests on the LTW range of loop testers, they were 2 wire (even on no-trip) and would autostart as soon as it detected 240v. You did have to be a little careful though, if you were careless and put line on first and ended up touching the earth probe and you were a bit...

Judging by the fact that it looks like conduit arriving in your flat, I'd hazard a guess that is nearly but not quite right... I wouldn't be at all supprised if the cables from the street arrived in cutouts on the two ground floor properties, and then were looped in conduit (probably terminated...

I must admit if the circuit only serves one point and its one with an RCD in, I will write the results in the RCD times box for that cirucit and add a comment along the lines of "RCD times relate to RCD in ceeform socket [4P/30mA/40A/AC]" but leave the RCD details for the circuit as N/A. I think...

Yes its dedicated circuit back to the board Generally 6mm but may need to be bigger in some circumstances. In most situations you need a twisted pair of signal wires with it for the CT clamp for the maximum demand protection Desn't need to be SWA unless its being buried, but if its going...

And remember the cat5e back to the mains/CU position to use one pair for the CT clamp (Or use EV ultra cable that has it inside the cable). Possibly add a separate cat5e back to broadband location if going for wired networking so the EVSE can be wired as well (note that not all support this -...

Its not as black and white as that Its worded as "Consideration shall be given to the provision of the neutral conductor, at each switch position, to facilitate the installation of electronic switching devices" which is a bit of a wishy washy statement, if you want to a neutral at switches, then...

At first I thought I needed a board in front of the light to kneel on while I worked at it, I think the theatre tech thought it was a little odd, but said "Theres a wooden board in the room with at the side with the Bench" Turns out they were right, it really isn't very usful to do that...., the...

Just a few pictures from a few recent jobs. First up is a termination of an LED driver, probably not too unusual for a DIYer or builder special, but this was in a recent development of 9 flats, which is 5 years old and due for first EICR. The electrical contractors stickers are proudly...

First of all is it Guarenteed TNS, or does it just present as SNE but possibly combined at somewhere on the way back to local TX. Remember that you can meet disconnection requirements with RCDs, even on TN systems if required. You are able to have at at least three levels of discrimination...

The one with the Hager AFDDs failing to trip because they were designed to pass against a different trip method? The problem with My Savery, is while he quite often has something worthwhile to say and can be funny with it too - he drags it out for for too long that I'm starting to fall alseep...

What is the earthing arrangement to the site?