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I think they are - how many have you got in your lounge :D.

You would still be able to use other systems, as you can now, but I would expect that The Plugs and Sockets etc. (Safety) Regulations 1994 would be changed, and the norm would be the new arrangement. The EU plug and socket project did not produce a fused plug. Provision was to be made in the...

We managed without any consistency for years. The colour coding of flexes had to be changed again in 2004 to bring them into line with the new cable colours. From BS 6500 I only used the example of cable colours to illustrate that IMO harmonization is not always a great benefit...

As an add on to the above - Manufacturers tend to view harmonization as a means of rationalising production, and this generally means reducing the range of products. The fact that the original idea was to provide greater consumer choice seems to be irrelevant to them. Look at any standards...

We spent 25 years trying to develop an EU Plug and socket. MK even made a mock up of one of the 'final ' candidates - but all to no avail. This was an EU project but there is a parallel IEC effort based around the commonly used EU plug. The UK always held out for a fused version but we...

The process is sometimes called Bruneling - the weight of the shaft squeezes the lubricant out and this can cause flat spots on the bearings. It is particularly acute if you also have vibration. This is why the spare bearings on a ship have to be turned at regular intervals.

:D:D:D

Checking that terminals remain 'tight' should be part of the inspection or maintenance process. However, this should be carried out with care. Over tightening can damage the terminal. Repeated tightening of brass tunnel terminals on every planned maintenance visit is a common cause of...

BAS - It would seem that on this occasion we substantially agree :D. I was not talking about using an 20A OPD on a cable rated at less than 20A, and you were not saying that I could not engineer my own solutions if I wished - so that's alright then :D. I accept that many people would want...

BAS are we reading the same thread? The only mention I can see about the use of a 20A OPD with a cable rated at less than 20A is ban-all-sheds wrote: I did not, at any point, suggest that it would. If you are alluding to the fact that, in certain installation conditions, 2.5mm²...

Well I haven't a clue what that lot is supposed to mean. The only statement I have made concerning a 20A protective device current rating and cable size is this. Now I was very careful to include the term 'subject to installation conditions'. I didn't even offer this as a proposal - you...

Was I - where have I said that then. I could make such a proposal, but only for money :D. Would it have to if I choose to define it as a ring final circuit.

I am not quite sure what you have in mind there BAS - I have not proposed any particular design. We must be careful here not to confuse the current carrying capacity of cables with the current carry capacity of circuits. Two cables could have a particular rating if used separately. However...

Well that should be easy enough - just ask your boss how much he is prepared to spend on wire and then buy the largest size you can get for that :D.

I have designed a number of 'domestic' installations' that have required 4.0mm² rings for voltage drop - my clients tend to occupy substantial abodes - they are the only types that can afford me :D. BTW I am not a titan - I have been on a diet don't you know :D.

Why is it the "whole point"? There are other consideration such as the number of load points that are traditionally connected; voltage drop; functional earthing to name a few. The fact that a reduced cable size can be used under certain circumstances is useful, but it is not the only...

433.1.5 only considers ring final circuits protected by 30A or 32A devices, wired using conductors with a minimum CSA of 2.5mm². As such it does not apply to other designs. A design using a 20A protective device might be wired using 2.5mm² and, subject to installation conditions, this could...

The specific regulation you mention [433.1.5] does not preclude other designs. 'Industrial power rings' with an protective device of 200A or 100A were quite common - these would now be classed as distribution circuits, but the principle still applies. They are a poor mans alternative to...

The loose connection is a 'strength and capability' issue (See the electricity at Work Regulations - Regulation 5). Strength and capability testing is not usually carried out on low voltage electrical installations - its too dangerous :shock:. We generally rely on inspection to identify...

Does that comply with BS 7671 [526.5] :D.