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Perhaps - but I seem to recall countless discussions of potential confusion prior to harmonisation which presumably lead to the assumption that a warning was necessary. Surely that's because 'best practice' improves over time. And also is this the first time a phase colour becomes neutral and...

Do they have ring circuits in the US? (Radial circuits, or ring circuits, are a chain of interconnected circuits with separate conductors, in case you were wondering) Edit: Paul_C beat me to it and commented more thoroughly on the angloisms in the article. Although the writer does americanise...

Fair enough - but can you give an example of something you wouldn't do as a result of seeing such a warning label? (which - if you assume the max potential is 'only' 230v you'd have been quite happy to have done). Thinking about it, I'm struggling to actually see the benefit of such a warning label.

[/url] Well I never, what will they think of next. TTC, I humbly apologise. If this is what the OP has, it is indeed useless as it doesn't even look like a usable screwdriver.

The point I was subtly trying to make was you recommended throwing the screwdriver-shaped instrument away as you assumed that any 'screwdriver shaped' tester must be a neon tester - as the OP mentioned it had a 'digitial read out' I would contend that it's not a neon screwdriver at all and that...

Why? The digital neon screwdrivers are much better than the old analogue ones...

Thanks for the responses. The consensus seems to be 'why change from rings?' and that makes sense. I've seen comments that RFCs will at some point be dropped from the regs so was a little concerned that I should take this opportunity to adopt a more 'modern' approach. cheers, Radweld

I have two standard 30A rings for downstairs/upstairs power which I am planning to update soon to overcome some legacy DIY issues. I've seen it mentioned a few times that radials are more in vogue these days, which I guess gives 3 options: 1. Keeping each ring as 32A/2.5mm 2. Split each ring...

Sorry to nit-pick, but RMS multiplied by 2 root(2) (or peak multiplied by 2) gives the peak-to-peak voltage. Or at least it did in my A-level physics lessons.

Voltage never, ever, flows anywhere.

Fair enough - I expected there must be some effect but couldn't find any references. That said, the effect appears negligibly small. From what I can see from datasheets etc. all pairs in Cat5 cables have the same nominal impedance specified. I don't think you can attribute an impedance...

The twist rate does not affect the characteristic impedance.

Notwithstanding the use of T+E outdoors, the set up as described does not sound like a 'ring' but actually a parallel run of two 2.5mm cables between a MCB in the main CU and a secondary CU.

I took this to mean the OP thought a general response their questions could be provided with reference to the regulations, as opposed to requiring a site visit as suggested by ericmark. Indeed ban and holmshaw have actually provided some responses to the questions without (presumably) a site...

Giving the OP the benefit of the doubt, I don't think he was necessarily trying to 'earth' the plastic (and assuming the plastic box is non-conducting of course)

To quote the report of the consultation period: I would hope with the increasing use of RCDs and various other factors, safety will have improved since 2005. If of course it can be measured in any meaningful way, as the original data part P was based on was statistically challenged. So no...

As the power consumed by a fuse is neglible, I assume the OP will also need to buy induction hobs for his two neighbours also if the DNO want to ensure the load is balanced... [edit] Typical, no comments about load balancing, then two come along at once

Having seen the state of various accessory wiring* it always strikes me as bad engineering to cram in unnecessary additional bits of copper in to the backbox. * I am sure everybody reading this perfectly dresses the cable in the backbox, fully sleeve all earths and ensure all wires are...

Class 2 SELV transformer and use 12V GLS BC/ES lamp?

As a follow on point, in both these cases, how would the fault ever be detected? Apart from all the metal work being live everything may still be working (In the PME scenario, I may be getting my neutral via my neighbour's MPB. Is this a case of 'circulating network currents' that has been...