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Agreed, it would be very rare to Test MCBs except for type testing an fuses we never check them either, we go with the flow with them. Yes that RCD data is quite old and it was collected abroad I think so it may not have been truly representative for the UK even back then. what a reasonable...

John I do not disagree with any of that. All to the good if you have a TT system and when connected to boding it effectively will have the benefits of becoming TN=like. The only problem is that if bonding from say one system (yours) becomes disconnected from nearby bonding even though you keep...

He is right about that one John, myself I have come across a few installations where the all the apparently good readings have only come about because main bonding is effectively giving a "good Ze" which disappears or very markedly increasing the ohms value because any previous tests have been...

YES INDEED. There is (almost always) no practical difference between a full blown traditional cooking appliance with hob, oven, grill etc all in one unit or with 3 or 4 separate units of the same total wattage and used in a similar fashion (example - a domestic setting with a typical family...

That`s a good question. Old habits die hard (not just in Electrics but also in many aspects of modern life). I`ve known a customer or three not liking me putting a socket in a new place rather than around the existing one and they did not like it because they were so used to using it in a more...

Plenty of those connections to E at the time were not much better than a a piece of wet string yet when we supplied our bit it had to be a substantial Earthing conductor and main bonding conductors , it just did not make sense really, It was just considered quite normal.

Well I could go with that BUT I almost never ever used 4mm T & E for many years of my working life (mostly on domestics) because I had plenty in stock of "common" sizes pertinent to what I actually need. 1/ When rewireable fuses were pretty much the norm. 2/ When MCBs started to become common...

apologies it was a typo, it was meant as go on but I bet you realised that

Goon EFLI what point am I missing?

Why would anyone be daft enough to place them securely in such a (relatively) inaccessible place anyway? Insanity, get your money back! What happens if one goes faulty and needs replacing, for example. Mind you I have seen dafter things done though. I mentioned one on here once or twice too!

Well a 2.5 spur on a 2.5 Ring final is OK therefore allowed, needn`t be any bigger csa but you could if you like, no problem. the one twin or one single was possibly done to prevent the previously allowed two singles being changed to two twins sometime in the future by someone unaware of all but...

In the Norweb area 100A cutout was not unknown yet in YEB area I was aware at the same time YEB insisted as a sort of policy that supplies were often "Upgraged?" from a 100A to a 80A cutout to accomodate their own 16.0 tails from cutout to meter but as far as I am aware they could still insist...

So we could add to the normative that a 4.0mm could be used for two single sockets I suppose.

Indeed I have been to bungalows, the info I put about rings have been in vogue at one time or another as being so called official guidance by the great and good or so for quite a few years each. Exactly why it was taught than no more spurs than on the ring proper became a well adopted rule I...

If a Ring Final Circuit is in T & E 2.5 for example (or 1.5 if "Pyro" usually) then you may spur anywhere either from the ring itself using say a junction box or for any point(socket, twin or single) and/or at the origin of the circuit (i.e. at the fuseway) . That is pretty much the accepted way...

Pipe lamps were common in the YEB area next to where I live but not in the Norweb area where I do live, I`m pretty sure YEB must have fitted them (they were not the "Tenby" sort either, they were in my opinion inferior to the tenby for contact and current carrying capacity onto the PILC and...

Where I grew up cotton was king, towns of populations of 22,000 and up were the norm and they housing was built around 1910. Electrics to the masses of homes was in PILC and any gas and water pipes were in lead. Originally home towns had their own electric supply for each town, I think that they...

Yes you must ask, they might not agree, I`ve agreed with time served qualified sparks then regretted the hassle but with "ordinary people" the chances of hassle is far greater surely?

Yup I`m pretty happy with that too.

There was an article in Wiring Matters a few years back that seemed to conclude they did comply if just one front end RCD there ditto two RCD. To me though it was a bit silly and two was better (or could become better than one and one RCBO each circuit was best - but RCDs were still relatively...