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Its about the best you're gonna get with simple ON/OFF control. Now if you want to get into proportional control thats a different thing all together!

I think you are still not clear on the terminology. Nobody is saying it takes 35A to blow. What we are saying is 35A is the MAXIMUM current that particular style of fuse can interrupt safely. If it is subjected to a fault current greater than 35A that it may fail in a catastrophic way and/or it...

I think you are missing something here. Just because the fuse in the plug is 13A or the MCB/fuse in the consumer unit is 30A does not mean that this is the biggest current that can flow. It simply means that this is the point at which the fuse/MCB will "wake up" and start to do its thing. If we...

That does seem very odd. I can't see that MK would make the mistake of suggesting that the actual telephone circuit should be routed through a BS546 plug & socket! I wonder if it was intended for mains power to a telephone device - a base for a wireless handset or a PABX perhaps? Back in the...

Maybe.... But we would need far more information. What you have shown is is the inside of a BULGIN PX0551 8 pin connector. Unfortunately just showing us that wiring means nothing - that connector has been used on many many things over the years - its not unique to Photoflash units. At one time...

Indeed. although I've lost count of the number of times that "Electricians" have told me that I MUST remove those out-of-date & illegal (?!) 15A plugs from my tungstem lighting kit and replace them with "modern" 13A plugs! Also, apparently, a 15A rubber plug to 15A rubber trailing socket...

Ah yes.... its also my experience that "Theatres", indeed any entertainment venue that needs to cope with varying temporary supplies, & 'Council Electricians' don't go well together. It always goes wrong! To be fair to the good old BS546 standard, the old 15A plug was so well engineered that...

I think this has more to do with the 'earth' than the phase! If you supply a load in your neighbors house from yours you'll also be exporting your earth into the equipotential zone formed by his bonding. There is no guarantee that your 'earth' will be at the same potential above true earth as...

That's deliberate? I always assumed it was the result of poor moulding/manufacture.

I think the problem here is that 'impedance earthing' is being taken out of context. Its normally done, in controlled conditions, to limit the fault current & hence the damage to a piece of equipment, usually a generator or a transformer. A typical example would be a large (several MW) genset...

Oh dear, it is very much an issue! The designer will have made certain assumptions when he developed that window & its seals - not the least of which is that water doesn't flow up hill! You can't just turn a window 180 degrees and expect it to still be water tight!

Such things already exist off_the_shelf.... Have a Google for "Shower Priority Unit" ..........

As I said at the beginning, this isn't a request-for-advice thread. Its more of a Sunday afternoon discussion thats now run over into Monday. I understand the pros & cons of running an earth free system. Most of the suspects I expected to join-in have, with the exception of Eric who I'm sure...

Are you thinking of the original festoon that was made by tightening the self piercing 'beantree' lampholders onto a two core flat rubber cable?

Gentlemen, Thank-you for your responses so far - none of which I disagree with. Lets explore the scenario a little further... So, if we run the system 'earth free' (no part of the transformer secondary is connected to earth), lets consider what would happen in the event of a 'fault'. The...

Following on from a recent discussion that moved slightly off topic and into the pros & cons of isolation transformers, I thought I would start a separate learned discussion :) So, the scenario : A temporary outside decoration is to consist of a 20m length of festoon cabling with 40 coloured...

So your "Electrician" has fitted a pipe clamp, intended for use on a hard copper water pipe to a soft lead covered PILC cable and hes says no need to worry! Hmmmmm The problem is two fold: Lead is very soft and will flow, at room temperature, when a force is applied. This means that it will...

Whilst I don't disagree, the house I grew up in the 1980s (ex Council House) had all the sockets & light switches installed like that - plastic box fastened directly to brick & semi plastered in.

It's almost certainly the inrush current when those LED drivers are first powered up thats taking the 5A breaker into its instantaneous trip region. In more detail.... the front end of those drivers will probably be a rectifier followed by a reservoir capacitor. When the driver has been...

There's a whole family of these. I agree that the 4h & 6h are the most common in the UK, but.... At work, we have some 9h blue 5 pin versions for 208V 3phase 60Hz.. Several times we've been told by "inspectors" that they are wrong & that blue must be 3 pin 230V :-)