maths

  1. Rockingit

    Motor maths - this makes no sense

    I've got a large USA artist music tour starting soon across Europe so we're having to sort out lots of reducer transformers etc, no big deal. But this has me stumped.... A USA manufacturer of a moving platform is requesting a 208v transformer @ 30A for the platform, but having doubled checked...
  2. W

    I need help with figuring out an equation

    Hello, I’m in dire need of help. here is the question A kitchen Ring final circuit is wired in 2.5/1.5mm T&E and protected by a 32A type B circuit breaker. 70m of cable has been used. Q1. What is the expected r1, r2, rn value ? So far I’ve used the equation R=Mohms/m X Length =1,365.7...
  3. electricwizard

    Electrical Installation Course & Maths

    Hello all, I have enrolled on an Electrical Installation Level 2 course. I've formerly worked in more academic fields, but I haven't used any sort of advanced mathematics in years, such as algebra, trigonometry, or transpositions in nearly a decade. I guess I'm asking for peace of mind as I am...
  4. Dan Carroll

    Volt drop maths

    Morning team Question about volt drop. I presume I am missing something here. So firstly the facts out the OSG. Table 7.1, page 66, lighting circuit, 6 amp, RCBO protection, 1.5mm cable. The max allowed length is stated as 106m. Using table F6 for the cable info, for 1.5mm cable the mV/A/m is...
  5. L

    New member with maths question

    New to the forum so hi everyone. I'm due to start an electrician course in July so I thought I'd revise some maths as it's been some years since I've done any. I bought the book 'Electrical installation calculations'. I've flown through resistors in series and parallel so far but have come up...
  6. spud1

    RCD protection maths?

    Hi all, My colleague and I were having a discussion today about RCD protection, as you do, and the reasoning behind why it is stipulated that 30mA should be the rating of an RCD for additional protection. Now we all know the rules regarding the maximum trip times for the various tests, but I...
  7. D

    Resistivity maths problem

    Hey all im just a bit confused with the formula for resistivity, i understand it until the text book gives an example whereupon the csa of cable goes from being 1.5mmsq (which i take to be 1.5 x 10 to -3M sq) to 1.5 x 10 to -6M sq which would make a csa of 1.5micrometeres would it not? Ive...
  8. S

    Another maths question sorry

    Hi again I've successfully done the first 2 with the help of you lovely lot :-) I'm on question 3 at the min and the thing that's thrown me is the resistivity has changed from having e.g. 17.5×10>-9 ohms m 17.6u ohms mm How does this change my formula do have to convert this to a...
  9. S

    Help with maths please (scientific notation)

    Hi all just had this homework sent me for next weekend been about 10 years since I've messed with a scientific calculator I think I've got the basics right of how to calculate it but when I put it into the calculator it's not coming up with what I'm expecting I think I'm inputting something...
  10. BarryJ90

    Worried about Maths on the courses

    Hi guys! As I’ve mentioned many times before I’m currently at college studying the C&G Level 1 in Electrical Installations. On this years course we have very little maths which works for me haha however I have looked at the level 2 and it is full of it! Now I wouldn’t say I’m thick but I...
  11. O

    Edexcel Maths 2017 Exam - TODAY

    My daughter sat a maths GCSE paper today - she is a maths genius BUT the last question got her completely flummoxed... She tried explaining it to me .... and her mum but she was wasting her time This link adds a few thoughts: Edexcel Maths 2017 Exam Sparks Hilarious Twitter Reactions From...
  12. S

    Advice on taking a bold step please

    Hello. Its been a long time since I have been on the forum...I came here for some DIY advice and was I suppose I got the correct replies suggesting I dont touch ...get an electrician. I understand that. Im now here to ask how hard it is to BECOME a qualified electrician. I have decided to walk...
  13. Lee Gold

    What is the maths like being an electrician?

    Hello I am not very good at maths and was wondering what kind of maths do electricians use everyday?
  14. B

    HNC Building Services - Maths Skills Require Brushing Up!

    Hi everyone, First time poster but long time member who could use some friendly and helpful advice please. Basically I'm at that point in my career were I'd like to move higher up the ladder and after speaking to work colleagues I've been advised that a HNC/HND in Building Services Engineering...
  15. S

    GCSE Maths help to prepare for HNC level

    I am hoping to start my HNC in Electrical Engineering September 2015......as i will be spending this next year completing my NVQ3, AM2, City/Guilds 2394 and i am also enrolling on a 12 week PLC course. My maths is not the best and i want to get my level up ready for the HNC........ Would GCSE...
  16. D Skelton

    Maths - Inductance and capacitance: Advanced

    Here's a nice little juicy one to get your teeth in to :)
  17. D Skelton

    Maths - Inductance and capacitance: Intermediate

    Apologies for the long delay but as promised, I am now working on a few maths questions relating to inductance and capacitance. Here is the first: p.s. Please just post answers first, once answers have been confirmed then we can go through the working out. This will enable others to post their...
  18. D Skelton

    Maths - Resistors in series and parallel: Beginner

    Maths - Resistors in series and parallel: Beginner
  19. D Skelton

    Maths - Resistors in series and parallel: Intermediate

    Maths - Resistors in series and parallel: Intermediate
  20. D Skelton

    Maths - Resistors in series and parallel: Advanced

    Maths - Resistors in series and parallel: Advanced

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

YOUR Unread Posts

Back
Top