Search results

INteresting; - That (the lid not being locked home) was my first thought too. Whenever I have used it I have found the quarter-turn interlocking flange locking procedure to be somewhat harder than I would have expected for an appliance designed for domestic use. It is possible that my...

We have a rather new (4yr old) Prestige pressure cooker, which seems to destroy its own gasket. It appears that the gasket succumbs to the heat and expands or otherwise becomes mis-shapen then fails to seat properly. The first time this happened I simply replaced the gasket, but exactly the...

Actually the comments regarding the "copper oxide layer" were something that did not initially cross my mind; so thanks, Bernard, for actually the only practical response so far on this thread. what I was thinking of here was practical cases when it would prove unsafely misleading to use a dc...

regarding the DC effects; is it possible for a chronic dc bias to appear across a mains supply? if so, by what mechanism(s)?

Thanks for some useless responses. I am well aware of the theory of how an earth impedance might differ from 0hz to 50hz and onwards down the wavelengths. I was simply interested to hear of any real-world anecdotal evidence of such.

under what practical circs might an earth impedance measured at DC be different to an earth impedance as seen by a 50Hz ac source?

We are trying to eliminate some problems with a pair of large and rather ancient dynamos (10kW ish size). the dynamos are compound-wound: - series field coil in the power take-off circuit - shunt coil controlled via rheostat to trim the line Volts. the behaviour of these ostensibly...

Would it cause any serious problems to run new (ie, modern) white goods (dishwashers, washers, driers, cookers) on a 60Hz 220-230V supply? I believe the motors in the motorised appliances would run a bit faster at 60hz than at 50hz, thereby slightly reducing their lifespan... but would...

What is the correct technical designation for "Normal grey twin&earth" cable? is it suitable for use in boats/ships/cars/caravans? if not, why not? in which conditions/environments is it designed for use, and why?

Is there a definitive method for installing a PL259? what are the little holes (sometimes circular, sometimes rectangular) actually for, in the core part of the connector? Ive just been working with a respected ex-RO and Electrician of many years experience who insists that no soldering is...

Yes I am! I am also very interested in best theory and practice regarding ELV on mobile units so that I can back up why something "looks bad" with why something might be bad. For instance, What, if anything, is wrong with using a mains MCB panel as a distribution board on a 24V boat?

I disagree The exemplum reg that springs to mind instantly runs sthg like this: Control gear should be installed so that it is operable by persons with limited reach. One way of satisfying this requirement is to install sockets at 400mm above floor and switches at 110mm..." (or something like...

Is there a "definitive" and/or "authoritative" set of regulations applicable to UK/Europe/The World regarding wiring of mobile units such as caravans, yachts, powerboats, fishing boats, portakabins where the supply is primarily ELV (12 or 24V) I'm after a document (ideally a book to buy) in...

Ive been asked to install a small CCTV system in a harbour authority's building. Nothing special, all 13A plug-in ELV stuff. I suspect that there will be one or more jobsworths who insist that all the stuff is PAT-tested before it crosses the threshold etc. Can anyone advise what the...

In a Previous Life, I had the dubious privilege of working with various trades around SE UK and this included some very salubrious parts of London. This brought me into occasional contact with a tranche of City Society generally called "derivatives traders"... I believe they are the tribe...

http://www.russandrews.com/product.asp?lookup=0&region=UK&currency=GBP&pf_id=1016 Im just working on a similar product myself, the "Super Duper Fuse". it will make white goods use cheaper to run by using less electricity. Shortly available from my website for £49.99 each - a snip. (pre-orders...

No need to shout!

This is an electrics forum of which I am a grateful member: As such - and as I have just demonstrated - the word "sparky" definitely has more than one connotation. I have simply drawn attention to its origin. The word "electrician" means "electrician" and nothing else. if nothing further...

Now that I look again at the photo, the connection to the metal backplate does appear to be an earth.... I no longer have the lumi to hand, but my initial glance seemed to show one of the Bayonet terminals connected directly to the backplate also. That does seem unlikely. thanks all for help...

after a further incredulous look back at a genuine & honest technical enquiry once again derailed by the disaffected, it strikes me that certain of us might do well to remember the amazing gift of bandwidth that we daily abuse at our fingertips. BNC - sorry, mea culpa. I meant Bayonet lamp...