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Outstandng 18th Oddities

As far as I recall, we still have some unanswered questions about some of the changes in the 18th. Does anyone have any further information about these? (If not at least this post should ensure the issues aren't forgotten with the demise of the old Forum.)


From memory there was at least:


461.2
  1. The intended meaning of the phrase "neutral conductor is reliably connected to Earth by a low resistance to meet the disconnection times of the protective devices" (given that the Part 2 definition of "Earth" is conductive mass of the Earth rather than any protective conductor or MET; and which protective devices are we talking about anyway?)

  • Also "protective equipotential bonding is installed" - is this intended to mean it actually is installed, or is installed where it is required? (Otherwise new installations with plastic pipes would need N isolation everywhere)


531.3.6 - if it the intention to prohibit the use of Socket RCDs and similar (e.g. FCU RCDs) for additional protection? (being that the generally comply with BS 7288 etc which appears to have a slightly different set of technical requirements to the standards listed)


537.3.2 - Switching off for mechanical maintenance. Although the definition of mechanical maintenance remains unchanged - so continues to include simple relamping - the requirements have changed considerably to the point they just about require complete electrical isolation. Thus a common lightswitch is no longer suitable for switching off for replacing a domestic lamp. Was this really the intention? Or are the changes aimed more at rotating machinery? Given that most householders would prefer not to plunge and entire floor let alone the complete installation into darkness to replace a simple lamp, should we be installing switches rated for isolation in every room?


any others?


   - Andy.
Parents
  • I am with WJ on this and I blame word processors for part of the problem. Prior to the widespread use of word processors there was no cut and paste, no insert a word/line/paragraph/page, the whole document or page would need to be retyped depending on the change. This typing would be done by a typist often in the typing pool. So in every handwritten/dictated  original each word or sentence would be considered and thought about. If you made too many changes to the original you would find the typing pool became "very busy" and you would be waiting over a week for your amendments. Alternatively you could type it yourself using one finger and lots of Snowpake (other makes available). Now, no one thinks so much as it is copy and paste, insert stuff here recirculate lots of times following numerous small amendments just because we can and the idea of thinking about things thoroughly before producing has gone out of the window and documents become so wordy and with so many revisions people don't bother to comment on all the amendments and rubbish gets output.


    The second problem is the advent of value engineering and the control of accountants and marketeers over the business decisions. Design outweighs functionality and everything is engineered financially to the bone and beyond. Ignoring price can anyone recommend a really good double socket in white plastic?


    Thirdly is related to OMS' footnote and the underlying value engineering. Rather than train people to do the job properly and allow them to make decisions a process is designed that can be followed by untrained/minimally trained employees at close to minimum wage. This process is then computerised and everything becomes a tick box exercise. How many times following a major problem often resulting in death do you here we followed our processes correctly, lessons will be learnt! When what they mean is our process was inadequate to stop us taking the blame and we will now change our process so the next time this happens it won't be our fault. No thought of training staff and giving them the power to make decisions.


    Finally for me this was brought home when a surgeon I know told me he had physically assaulted a patient. He had been forced by the process, waiting time limits and an obnoxious patient who was going to complain to eveyone, to perform an operation that he believed was unnecessary. Fortunately the outcome was good but this was a major consideration in him taking early retirement from the NHS.


    We're doomed, we're all doomed I tell you. ?


    Kevin
Reply
  • I am with WJ on this and I blame word processors for part of the problem. Prior to the widespread use of word processors there was no cut and paste, no insert a word/line/paragraph/page, the whole document or page would need to be retyped depending on the change. This typing would be done by a typist often in the typing pool. So in every handwritten/dictated  original each word or sentence would be considered and thought about. If you made too many changes to the original you would find the typing pool became "very busy" and you would be waiting over a week for your amendments. Alternatively you could type it yourself using one finger and lots of Snowpake (other makes available). Now, no one thinks so much as it is copy and paste, insert stuff here recirculate lots of times following numerous small amendments just because we can and the idea of thinking about things thoroughly before producing has gone out of the window and documents become so wordy and with so many revisions people don't bother to comment on all the amendments and rubbish gets output.


    The second problem is the advent of value engineering and the control of accountants and marketeers over the business decisions. Design outweighs functionality and everything is engineered financially to the bone and beyond. Ignoring price can anyone recommend a really good double socket in white plastic?


    Thirdly is related to OMS' footnote and the underlying value engineering. Rather than train people to do the job properly and allow them to make decisions a process is designed that can be followed by untrained/minimally trained employees at close to minimum wage. This process is then computerised and everything becomes a tick box exercise. How many times following a major problem often resulting in death do you here we followed our processes correctly, lessons will be learnt! When what they mean is our process was inadequate to stop us taking the blame and we will now change our process so the next time this happens it won't be our fault. No thought of training staff and giving them the power to make decisions.


    Finally for me this was brought home when a surgeon I know told me he had physically assaulted a patient. He had been forced by the process, waiting time limits and an obnoxious patient who was going to complain to eveyone, to perform an operation that he believed was unnecessary. Fortunately the outcome was good but this was a major consideration in him taking early retirement from the NHS.


    We're doomed, we're all doomed I tell you. ?


    Kevin
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