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.
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...
Took my 18th edition and actually got a question on volt drop after watching this video i made a note of this formula so cheers
I am looking to take my 18th Edition exam early 2023 this will help me a lot with revision and studying - thanks
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
Voltage drop calculation can be found written in word format on page 381 of the 18th edition under Tables of Voltage Drop, 3rd paragraph
Pass mark is 60% you don't even need any calc to achieve this bolocks... Every year same thing for 600£ ...
@@BOBtoper did you pass the exam?
you can find it in the IEE electrical installation design guide (calculations for electricians and designers) and with an example
Great course, well delivered and supported.
Any chance you could make some more videos on this and 2391 it would be great I like how you teach.
Thanks for the sharing the video. You made it easy for me to work out. Hope you share some more important videos like this. Thanks
Don't you have to double the length of the cable to take into account of the length of the live plus neutral conductor?
It is WRITTEN in the book
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?
Crystal Clear !
👍🏿
Your not allowed to write formulas in the book if you want to use it in the exam.
It says on city and guilds website
Very good thank you
Great vid, thanks for sharing.
Wouldn't the 40m be divided by 2, assumption made that it's a ring circuit and each end of the ring goes back to the MCB?
thanks
Great stuff!
How can you put a 2.5 on a 32amp mcb? Doesn't seem right does it?
Would increasing wire thickness reduce the drop?
Yes. Lowers the resistance and lowers the volt drop. Table 4D5 in the regs book.
Thanks .. really useful video
Very useful
Thanks for sharing
Lads,what about the formula U=I×R×1.2?it gives me two diffrient results,one is acceptable the other is't....how come?
Thanks for vid
......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.
@@zsoltcseszak3366 Thank you
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.
Vd =(mV/A/m × Ib × L ÷ 1000.......Transpose to L = 1000 × Vd ÷ mV/A/m × Ib......You must know this as well
It will be better if you add the text which you are saying in video.
God bless you.
daaamn, 21 V drop for 40m. I thought you get 5V for something like that.
Actually i was amazed too. Would never ever imagine such a drop.
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
super spark
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.
You can write inside your regs book no problem, mine is littered with post-it notes and written notes and highlighted stuff.
Write it out on a4 then stick it in the back of the book. If it's glued in it becomes part of the book
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.
You are 100% correct. It was one of those when auto-correct did its thing and I forgot to change it... All the best!
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.
@@lorus511 Thanks for the reply...So the yanks stuck with Imperial.. Great! good on them..
@@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...
Your a G
Voltage drop is 2.16V not 21.6V ...
No, it is not.