I’ve just finished a domestic installer course could not fully understand when it’s was being explain in class however after watching your video was so simple top man thank you
But how do you know which parts to ignore?. I’m getting questions like this: ‘What is the maximum voltage of a separated circuit where electrical separation is the protective measure?’. Which words are the ‘Key’ words to search in the index?. I see several and it’s leading me down the wrong roads. Tips anyone?
......I can see 3% and 5% on page 383,but not 6.9v and 11.5v figures .I know they are in Regs somewhere but can't see where?.Any ideas would be appreciated.Great video .Thank you.
These values are calculated as Trevor goes through the online course. As you follow the course, you will make a small note here on page 383. It can be very helpful for the exam.
You do not need to see them written anywhere in the book. You just simply and mathematically calculate the percentage out of the standard 230V. It is really very easy. It is obvious to see that 2.3V represents 1% out of the standard 230V. So how much would be 3% or 5%? Well, it couldn't have been any easier than that: 2.3V x 3= 6.9V (3%) and similarly 2.3V x 5=11.5V (5%). End of.
Simple, it would simply not pass the requirements stated and it would not be allowed to be switched on in the first place due to the fact that it does not fulfill the current regs
this is taught when training to qualify as an electrician ( C&G 236... ) there should be no need to remind guys how to calculte voltage drop just for the regs exam
Respectfully, unless things have changed we are not allowed to right any extra info in the book. Eg ohms law is not written in the book. Thank you for the video.
Very informative. Just one small point though, you spelt M-E-T-E-R which is the American way of spelling it. In this country the correct spelling is M-E-T-R-E. I'm not trying to be pedantic but as you are a teacher I just thought you ought to know as you are spreading the word.
The English way to spell it is Y-A-R-D. Why oh why did we go metric.?Imperial measures were old wordly and quaint.The rest of the world ,Europe and America should have adopted to our way By the way. does America use Imperial or Metric?mm
We were supposed to go Metric in 1971but it never really went down well with any of us - even now nearly 50 years later it still sticks in our craw. The Americans stuck with Imperial - one of the few countries that still use it.
@@sansoucci5394 - Correction -Europe had the imperial system as well as the metric system. It isn't an 'English' invention of yards, feet , inches, it's just that Europe got rid of it sooner but 'England' held onto it providing this perception of uniqueness. I bet you wouldn't say that if you had kept the Julian calender. That is why the tax year starts on April 6th every year. Another shortsighted move by the English at the time...
