Questions from Viewers: How to Calculate Volt Drop based on the Resistivity of a Conductor

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3 жыл бұрын

In this video we're looking at a question from a viewer on Resistance and Resistivity. It's a great question because it combines electrical principles looked at in other videos with practical areas of electrical installation work such as cable length and volt drop.
These videos are aimed at learners studying electricity on any course and will help those studying the City and Guilds 2365, 5357 Apprenticeship, 7202 and 8202 courses as well as the EAL Diploma in Electrical Installation.
#SIUnits #joerobinsontraining #scienceandprinciples

Пікірлер: 41

@naileldarov1451 Ай бұрын

Joe, your explanation is just brilliant. Thank you very much for all your efforts here. The only thing which is disappointing me is, KZfaq - it doesn’t allow me to give you thousands of likes😊. You deserve it

@issacvaughn3409 5 ай бұрын

Thank you Joe. You are explaining this very well and I am actually learning.🙂

@LocoSajoca 3 жыл бұрын

This is brilliant. Great explanation and so very easy to understand and shows how useful it is knowing the principles that we must apply in the real world situations

@JoeRobinsonTraining 3 жыл бұрын

Glad it helped! 👍

@cristianbacu4010 3 жыл бұрын

Thank you. I am taking a course on electrical installations for professional reconversion and your videos help me to better understand the theory. BTW I am a Romanian and I studying in my country, in the city of Cluj Napoca at the class of 2 very passionate professors.

@JoeRobinsonTraining 3 жыл бұрын

Great to hear, sounds like you'll do really well. 👍

@seandempsey9396 3 жыл бұрын

Thank you Joe that was an excellent lesson, the one subject I could never get my head around with out some help. Thank you for making it so easy. Another great video as always.

@no_short_circuit 3 жыл бұрын

Thanks Joe. At first the question looks daunting to a learner, but the way you break it down makes it very easy to understand.

@JoeRobinsonTraining 3 жыл бұрын

Thanks very much. 😊

@Ben-zn8pe 3 жыл бұрын

I see myself visiting this video a few times, excellent explanation. Cheers

@tedlahm5740 3 жыл бұрын

Joe: Great explanation. Thank you. Also made mention of Kirchhoff's current law for series circuits.

@mmmm-lf1bn 5 ай бұрын

Thank you Joe 🙏🤗

@eddprice4571 3 жыл бұрын

Back in action Joe 👍great video, informative and easy to follow.

@JoeRobinsonTraining 3 жыл бұрын

Thanks Edd. Trying to keep the content coming. 😊

@ryanmontes11 3 жыл бұрын

Thank joe love your lessons better then my teacher at college you been help me so much

@reelsjury8095 2 жыл бұрын

Thanks, Joe your explanation is brilliant I learn more than school. I would like to ask you a Qs if it's possible to answer so how to calculate triangle P,Q, and S of a diesel-driven aggregate motor 65Kw?

@markrowland5393 3 жыл бұрын

Excellent question and explanation.

@JoeRobinsonTraining 3 жыл бұрын

Thanks Mark. 😊

@mrpoo7651 2 жыл бұрын

Your vids are awesome.

@JoeRobinsonTraining 2 жыл бұрын

Nah, the subject's awesome,

@Crazy2011People 3 жыл бұрын

Great video another question please because the load is motor ( coil + capacitor) so the current not alll the time the same so what's the volatage drop please ?

@jeremykemp3782 2 жыл бұрын

So in a real-life situation, in a domestic house, it would be a parallel circuit to the actual socket from the consumers unit. . And then from the socket to the machine which is supplied by a 16mm aluminum cable would be in series? I find this hard to grasp. Can you help me understand this please Joe

@darendooner7814 2 жыл бұрын

Hello Joe great tutorial thank you. I've just done the Health and safety exam and the communication exam im looking at your si videos at the moment could you tell me what videos follow on from your si videos thanks Daren

@JoeRobinsonTraining 2 жыл бұрын

What course are you doing Daren?

@darendooner7814 2 жыл бұрын

@@JoeRobinsonTraining im doing level 2 diploma 2365 ,when we go back we will be doing scientific and mathematical principles, I would like to know what order to watch your videos in I've looked at your si tutorials and today I have been looking at your tutorials on fractions which I have found really helpful, thank you Joe 😊

@darendooner7814 2 жыл бұрын

@@JoeRobinsonTraining im doing level 2 diploma 2365 👍

@JoeRobinsonTraining 2 жыл бұрын

Start checking out this playlist: CIty & Guilds 2365 Unit 202 Principles of Electrical Science For 602 Multiple Choice Exam: kzfaq.info/sun/PL7eNzIRgKe05OTY_izNhHMi-ODaejd2p1 It'll get updated over the next few days. 😊

@darendooner7814 2 жыл бұрын

@@JoeRobinsonTraining thank you Joe 💥

@denmarknapoles2213 2 жыл бұрын

Hello sir good day 🙂 How about looking for the overall power factor given : load A = 3.6 KW at unity p.f load B= 11.5 KVA at lagging p.f of 0.6 load C=5.52KW at leading p.f of 0.8. Oi in which it is connected in parallel.

@JoeRobinsonTraining 2 жыл бұрын

Oosh, great question!

@jackpoole259 3 жыл бұрын

Can you do EAL level 3 science and prinapuls

@seniorcomputer3292 3 жыл бұрын

Joe, a burning question. Given that amperage is a function of conductor size, (coulomb of electrons) being pushed by most any voltage. The question is in a step down transformer (example 2-1 step down) INPUT 12 volts and 12 amps. The output would be 6 volts BUT the amps is GIVEN as double to 24. But, amps is a function of conductor size on the secondary winding, so what is the correct amperage when we do not know the conductor size, Confusing question? Thank you.

@JoeRobinsonTraining 3 жыл бұрын

You kind of need to think about the question in reverse, there will be a load connected to the secondary side of the transformer, the resistance of this load combined with the secondary voltage will determine the secondary current. This will then determine the primary current. The power in to the power out of the transformer will be equal for a perfect transformer and so if the voltage is lower on the secondary the current will be higher to keep the power the same.

@seniorcomputer3292 3 жыл бұрын

@@JoeRobinsonTraining Thank you. now looking at it in reverse. The load determine the current. Thank you again.

@vitog3806 3 жыл бұрын

Hi joe , why could you not use the voltage drop formula? I know it’s r1 +r2 in the formula but as you have done you just double the resistance .After you calculate resistance , multiply that x 2 (line and neutral) vd=ib xl vd= 45x40x0.1325/1000? Then subtract that from the 230 cheers

@cristianbacu4010 3 жыл бұрын

There are 2 formulas for calculating the voltage drop, one for the single-phase circuit and a second one for the three-phase system. They account for Resistance, Reactance, Current and Phase angle, and of course the Lenght of the conductors. I think Joe will eventually get there with the presentations, but he needs to introduce few more concepts to be able to do that.

@optimussmith7795 Жыл бұрын

juts to clarify did R1 and R3 symbolise the twin 20 metre conductors and therefore two resistors

@paulpkae 2 жыл бұрын

Joe great videos but in this instance I think your calcs are not entirely correct? If the motor is rated at 45A @ 230V then there is not 45A running through the circuit as there is not exactly 230V across the motor. Would it be better to first calculate the impedance of the motor , then the total resistance of the circuit and then the true total current; which I think is 43.86A ?