How to Calculate Trunking Capacity (Size). How Many PVC Single Cables can we Install in a Trunking.

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

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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[swrdashy]

I struggled to understand these in class, but this lecturer made it easy for me and now I can say that I confidently can put them into practice. Thank you so much!

[baileyyates]

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

[no_short_circuit]

As an adult learner and studying all this as a hobby using books and YouTube 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.

[leobadea]

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.

[LindaTheLearner]

Your apprentice hub is a life-saver 🙏🙏🙏🙏

[mikea]

This is an excellent refresher! Thank you so much. ☺️

[Ghbarl]

These are fantastic guides. Thanks once again Gaz. This video HAS been of some help! 👍🏻

[amin]

🎉🎉🎉❤❤❤❤THANK-YOU THANK-YOU THANK-YOU THANK-YOU THANK-YOU 🎉🎉🎉🎉🎉❤❤❤❤❤❤. It was a nightmare for me, now its a piece of cake.

[pesti_ja]

Another great teaching video, thanks. And works well with the eFIXX thing. I always learn stuff when I watch your presentations.
Just.... question 10?

[GiffordsElectrical]

Top video Gaz. I might just go and do some of those myself.

[vitomartino]

This Video is fantastic, well done guys. Will you be doing a video on cable calculations in the near future?

[johnnyambi]

Is it recommended to wire power and lighting circuit conductors in one conduit

[dumil]

Hi there, thank you for the good lesson. Have the notes been taken off? I can't seem to find them.

[fluffmechanic]

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?

[eslamelfayoumy]

Brilliant video, how can i get the eamples paper that you used in the video?

[jamesdyas]

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.

[gbelectricks]

Brilliant video, Is there a separate table for running pvc/pvc cables in trunking? Such as double insulated tails or just twin and earth??

[foxxmulder]

Are cable factors and trunking factors in the 18 ed 7671 book?

[paulgoffin]

"Can we round up?".
No, it's trunking, we must Truncate.

[emmanuelasare]

please try and combine theory with practicals.Because i am not getting what you are trying to say