Discuss HELP PLEASE!!! 2365/615 electrical system designs in the Electrician Courses : Electrical Quals area at ElectriciansForums.net
im the same john stuck on question 2 a 2b right to 2iSo I’ve recently started my level 3 course and I’m doing electrical system designs the one with the hotel extension and pool and cafe block I’ve done question 1 but stuck on all of question 2 some guidance would be appreciated thanks.
im the same john stuck on question 2 a 2b right to 2i
Show us what you have and we'll steer you in the right directiondoes any one have any completed or part done plans for the 2365/5357 drawings to see if I am doing it right
Easy method, use the adiabatic equation to find out the sizeI’m suck with the question attached 615 2365 electrical design project ? question 5 2 hours still can’t work out the answer
Thanks for this it’s just different this level 3 as I’m dyslexic not with reading and writing but with maths and new things of of my comfort zoneEasy method, use the adiabatic equation to find out the size
S = ✓ I^2 * t / k
I = the current required to operate the device
t = disconnection time required for the device
k = factor given for the cable selected - Typically 115
So for argument's sake, let's say we have a fault current of 320 (taken from your trip curves) a time of 0.1 (taken from your device operating times) and a K factor of 115 (taken from the tables following the trip times)
S = ✓ I^2 * t / k
S = ✓ 320^2 * 0.1 / 115
S = ✓ 102,400 * 0.1 / 115
S = ✓ 10,240 / 115
S = 101.19 / 115
S = 10.05
As there is no conductor with a CSA of 10.5, you select the next size up, in this case 16mm^2
The above is purely and illustration and values may not be accurate but it serves to show how to lay out the equation so that you can understand what is going on at each step.
Hope this helps
@John J I can't PM you as you have limited who can see your profile.
PM me & I'll send you my PDF file
Dyscalculia you mean? ?Thanks for this it’s just different this level 3 as I’m dyslexic not with reading and writing but with maths and new things of of my comfort zone
What you struggling on? Show us what you have and we'll offer some guidance.im doing this assignment right now honestly i think its mental who thinks of this ----
Hi,What you struggling on? Show us what you have and we'll offer some guidance.
Ok, easy;Hi,
I don't currently have any pictures but I've drawn out on the hotel rooms how each would be wired for what the spec asks for. After reading through and breaking down the task sheet and looking around the forum I am beginning to understand this more taking it a bit at at time. I have less than 2 weeks so I was in a bit of a panic.
This is a question I do not understand
"Select, with the aid of manufacturers’ data, a suitable range of circuit protective devices for this
contract. Your selection should be based on the following
Prospective short circuit currents
Requirements for additional protection and special locations"
Thanks for both of your comments, really helpful, I'm gonna use that information to keep going at it. Even if I get it wrong worse thing that happens if the tutor hands it me back to try again hopefullyView attachment 86309
Column 1 Circuit name
Column 2 applicable 7671 regulations
Column 3 reasons for RCD Omission
Column 4 RCD Required? Y/N
Throw th up here and we'll see what we can help with. A fair few questions have been asked in recent months about the hotel project so you might find your answer with a bit of scrolling and searchingHeyo lads, I’ve currently finished my Level 3 course and only have this Hotel Design project to hand in to complete it. I have 3 weeks to hand it in before I fail.
Due to COVID, job losses, family losses, I’ve only just managed to pick myself up and get round to it. Having finished my course a couple of months ago, I’m kind of stuck on a lot of questions and unsure where to go from here.
Mainly the drawings, unsure of the correct symbols to use, colours to use and where to place them.
If anyone could give some guidance on this project an help with a few questions it would he much appreciated, I already see some of the posts in the past can help so i’ll also use them.
Feel free to pm me or reply
thank you
I'm with you all the way, apart from 101.19/115 equaling 10.05. I feel awful for pointing that out.Easy method, use the adiabatic equation to find out the size
S = ✓ I^2 * t / k
I = the current required to operate the device
t = disconnection time required for the device
k = factor given for the cable selected - Typically 115
So for argument's sake, let's say we have a fault current of 320 (taken from your trip curves) a time of 0.1 (taken from your device operating times) and a K factor of 115 (taken from the tables following the trip times)
S = ✓ I^2 * t / k
S = ✓ 320^2 * 0.1 / 115
S = ✓ 102,400 * 0.1 / 115
S = ✓ 10,240 / 115
S = 101.19 / 115
S = 10.05
As there is no conductor with a CSA of 10.5, you select the next size up, in this case 16mm^2
The above is purely and illustration and values may not be accurate but it serves to show how to lay out the equation so that you can understand what is going on at each step.
Hope this helps
Don't, the point was to put across the layout/concept, thr fact that maths is wrong just gives me a chuckle.. that'll learn me for trying to be a smartarse ?I'm with you all the way, apart from 101.19/115 equaling 10.05. I feel awful for pointing that out.
Sorry
Drop a PM to @Dan or @Lou , follow the template given and you'll be in soonHi guys, new to the forum. Can some one tell me how I can get access to the trainee forum? Everytime I click on the link Apply to Gain Access to Trainee-Only Forum, it stays on the same page.
I'm probably just being a bit thick!
I’m doing this aswell and completely lost did you manager to do it all@Loki be much appreciated completely lost Atm
Thanks for the help lister! Think I have nailed questions 1,2,8,9,10. Going to give the others a shot now but will be back if I need some hints/tipsMost listed here; Electrical Symbols | TLC Electrical - https://www.tlc-direct.co.uk/Technical/Symbols/Index.htm
In fairness you'll find that ones you need in OSG, atypically you'll be using sockets, light fixtures, light switches, motors, emergency lighting and the standard symbol for a CU
Hi on question 1 did you find an example on the internet to useThanks for the help lister! Think I have nailed questions 1,2,8,9,10. Going to give the others a shot now but will be back if I need some hints/tips
Likely yes, it's not a hard one to grasp; Find a manufacturer (Fusebox, Wylex, BG), Download/Print the datasheets and use them in your project. Not sure why this is hard for some (not a dig at OP, purely an observation as it's not that first time this has come up)Hi on question 1 did you find an example on the internet to use
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