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Who said it was more than 25% though? There was an Electricy Supply Act 1989 (for suppliers not consumers) and a Electricy at Work Refualtions 1989, but can't find the one you refer to, although I am sure you are right, I would like to read it if you know where I might find it? Well I...

Cool, ok I shall investigate :)

The tank supplies the entire building (around 20 flats) I don't think empting it is an option :? It's my g/f flat, so an invested interst, and I think I am a fairly competent plumber, although have little experience with iron pipes (copper/plastic etc no problems). I suspect too, the way...

A classic I am sure, but I think it's one with a diference. Let me paint the picture. Ex-Council building. Huge tank on roof (no access to). Iron pipe that come down to each flat, with a stop cock on. After which a short length of iron, before the first sight of any copper. Stopcock...

Nearly all alarms now days have resistance sensing, so you would need to cut and rejoin the loop with the correct resistance link within the time it takes for either the analogue (or probably now digital) watchdog circuitory to notice a change (fractions of a second). Also bare in mind: 1...

Damn, beat me to it :)

Nearly all houses are one single phases. A three phase supply usually comes to the end of the street, and then groups of house are on each phase, to crudely balance the load. To cause problems with an unbalanced load, you need serious differences between loads on the phases, at which point the...

Yup, or if you are a dab hand with a soldering iron, do what I do. Open the micro filter, and solder the incomming BT line to the pins 2 and 5 on the LIne input. Run the PC's ADSL RJ11 to the output socket, extending via structured cabeling if required. Connect the entire house telephone socket...

I think what they are saying is: To RECONNECT the supply after the isolater is fitted, they want a cert. My advise would be take the main fuse out and proceed with the work, then call them out when the work is complete to have the isolater fitter (For any future modifications) and also the...

Well you should terminate all the earth connections together at the back of the plastic box, and have a fly lead from those terminations to the faceplate yes.

I think if you had 20A of current flowing from say a limb to you foot, you will be in serious trouble (fatal). So Spark Although what's far more likely is spark touchs live wire, being AC there is no problem associated with muscles contracting fully, and spark would therefore pull his hand...

Order some CONGO BLUE filters (tube type) from Lee Filters (a theatre lighting colour gels company) They com in the standard neon lengths. CONGO is VERY dark, and will give a "night light" feeling, with very limited UV content. If you want UV, you can blue specific bulbs, but they are not...

Absolutely, and I also produce on, leaving a copy inside the end station so should any other engineer be called to site, or I return after a couple of years, no one looks like a pleb walking about trying to work out how a wire gets from one place to another, or which colour was used for the H/O-...

Well they actualy query the DVLA database to double check the informations you give them with regards to penalty points are true. Either way thou, if you don't have a licence, why would you take out insurance? It would be invalid (as you say) - but anyway :p

ERRRR what are you on about? I mainly fit Menvier panels, in particular the TD790iD or TD690iD panels. CastleTec have a number of iD based systems too, as do scantronic (who are actualy part of Menvier anyway). "The main cable goes down" - that's a bit like saying if the onboard fuse...

I used to go out with a senior underwritter who explained that when they asked if people were qualified, it simply ment that they have take some form of training. It is VERY slack, and one of the major problems with fly by night sparks... Ever seen rouge traders, you should see the one with the...

Most systems are now iD systems which allow all the detectors to be wired in any configurate, which one contacting a small "biscuit". This makes the wiring very neat, as a four core (screened) cable can be used to simply daisy chain around the house. There are very few false alarms from...

HSS drill bit I am afraid. managed to once use a small swiss file to cut a sloted grove straight accross to top of the screwhead, and use a flat head screwdrive to remove it, but it's a time taking procedure!

Am I not right in thinging that they CAN say install the flue, vents and fix boiler to wall, but it has to be testing and inspected by an COGI approved engineer, who also needs to apply seals, connect gas supply and issue a saftey inspection? I feel I should know this now I am working towards...

I have used solder joints with crome, but you have to scrape/strip/file the crome plate off the part which fits into the solder joint, do the joint, then use some crome coloured metal paint if any of the joint is to be showing (but sounds like you could get it all into the wall channel? No...