How to Calculate Trunking Capacity (Size). How Many PVC Single Cables can we Install in a Trunking.
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- čas přidán 17. 07. 2024
- How to find out how many cables you can install in a trunking using Appendix E of BS 7671 On-Site Guide. This video is linked to notes you can find on the eFIXX apprentice hub link below. This is part one showing you how to workout the maximum number of conductors you can install in a trunking.
How to calculate how many cable we can install in a trunking.
How to calculate trunking size.
How to calculate Trunking capacity
How to calculate the number of cable that can be installed in a trunking.
How to calculate trunking full.
In this video I calculate how many PVC singles can be installed into a trunking. The cables in trunking can only take up 45% of the space within in it with the rest 55% being space. This is called in exams the space factor the space factor of trunking is stated as 55%. I then go about selecting the correct size trunking when the conductors to be installed have been designed and selected.
== 🕐 Time Stamps - Cut to the action 🕕 ==
00:00 - How many cables can we install in trunking
01:41 - eFIXX apprentice hub "teachers corner"
02:51 - Appendix E of the On-Site Guide
03:19 - Solid or stranded conductors
04:17 - Thermoplastic PVC cables
04:37 - Trunking factors
06:02 - Worked example number 1
10:25 - Problem number 1
11:57 - Worked example number 2
16:08 - Problems to solve
EFIXX apprentice hub
www.efixx.co.uk/apprentice-hub
Videos are training aids for City and Guilds (C and G) and EAL courses Level 1, 2, 3 plus AM2, AM2S and AM2E.
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I’ve been struggling on this topic for while for my upcoming 203 exam and you explained to me what my tutors couldn’t in 9 minutes
Thanks for the support and great comment 👍🏻
As an adult learner and studying all this as a hobby using books and CZcams these lectures are invaluable to me. I'll never be able to do anything with it as I'm not qualified (and well over 70!!) but I'd love to be.
This is an excellent refresher! Thank you so much. ☺️
Thanks
These are fantastic guides. Thanks once again Gaz. This video HAS been of some help! 👍🏻
Ghbarl thanks 👍
Your apprentice hub is a life-saver 🙏🙏🙏🙏
Top video Gaz. I might just go and do some of those myself.
🎉🎉🎉❤❤❤❤THANK-YOU THANK-YOU THANK-YOU THANK-YOU THANK-YOU 🎉🎉🎉🎉🎉❤❤❤❤❤❤. It was a nightmare for me, now its a piece of cake.
This Video is fantastic, well done guys. Will you be doing a video on cable calculations in the near future?
Keep it up dude, I am a lazy f'er and this has helped me to understand what to do to get the answer. Exam coming soon ... I wish I could find a book with questions like yours as its much easier to learn by solving problems for me.
Checkout the eFIXX apprentice hub online for my question papers for level 2 👍🏻
Big help Gaz thankyou. 👍
Another great teaching video, thanks. And works well with the eFIXX thing. I always learn stuff when I watch your presentations.
Just.... question 10?
💪 great channel 👍 Gaz
Thanks Steven 👍🏻
Wonder if there are any regs about the maximum number of cables you can pull through a hole in a hoist or should you just aim for 55% free space? Excellent videos thanks.
Brilliant video, Is there a separate table for running pvc/pvc cables in trunking? Such as double insulated tails or just twin and earth??
Hi look at the bottom of page 150 of the On Site Guide. It talks about the overall cross-section of conductor... this should help with your questions. Thanks for watching. Gaz 👍
The paragraph you refer to is a little vague! I can see it says that the sum of the overall csa’s of sheathed cables should not exceed 45% factor, But how would you actually perform a calculation to verify your not installing too many cables into a given trunking? (eg. How many 25mm double insulated tails fit into a 100x100 trunking?)
I will be running 13 x OM5 fibre cables together with a single 4mm power cable through mini trunking. Is there a video on how to calculate the size of the mini trunking I should use?
Hi there, thank you for the good lesson. Have the notes been taken off? I can't seem to find them.
Brilliant video, how can i get the eamples paper that you used in the video?
www.efixx.co.uk/Apprentice%20Hub/downloads
The link above should help 👍
Is it recommended to wire power and lighting circuit conductors in one conduit
Are cable factors and trunking factors in the 18 ed 7671 book?
On- Site Guide 👍🏻
"Can we round up?".
No, it's trunking, we must Truncate.
Always round down 🦾
@@GSHElectrical "rounding" is a different kind if statistical process. This is truncation, which just happens to be a related word - both come from "cut off", trunking has its origins in the "trunk" of a tree which is a tree with its branches cut off.
please try and combine theory with practicals.Because i am not getting what you are trying to say
czcams.com/video/o8pcBZSGa6s/video.html
czcams.com/video/nAFQgAEK6Uc/video.html
These may help with thinking behind the trunking video 🦾