GLAD, you like the
spreadsheets (see btm of this msg for all the hyperlinks), I put them together because it's nice to have decent templates/instruction to work with, when you need them. My Professions/Quals? HALFORDS (RIPSPEED AUDIO), PETRO-CHEM (BUSINESS PROJECTS ANALYST), PAT TESTING (THIS LEAD IS KNACKERED, THIS NEEDS A NEW PLUG), currently SECURITY.
Business Degree, IT Cisco Qual (CompTia A+), H&S, CSCS, SIA, etc.
MY POSTS were always WORKING TOWARDS THIS VERY NEXT TOPIC: "THE UNSEEN FLOW OF ELECTRICITY, ELECTRONS: A
nions - and Cations +". Clearly in all I've seen so far the only method of RING AMPAGE spread/distribution, is the Kirchoff equation, as I know of no MULTIMETER METER or SCANNER that can measure the number/direction flow of minority/majority of electrons.
SIMPLY the two hardest aspects of ELEC 240V:
~ Calc RING CIRCUIT distributed/spread ampage SKT WIRE calc (That is "where" ELECTRONS flow when drawn by LOAD,
anions - and cations +, such as unlikely to be distributed evenly through skt wire lengths, hence most likely skt wire(s) nearest to source).
~ some lighting circuits.
MULTIMETERS and ENERGY MONITORS I'm very familiar with, so VOLTAGE, CONTINUITY and AMPAGE, I obviously know.
Well I know the max WATTS consumption of every appliance in my house, and the average times these appliances are used daily.
But many ELECTRICAL CONTRACTORS, will not know the MAX AMPAGE of all appliances, nor will they know average time use of appliances, especially for ELEC SKTS, so they will use some sort of AMPAGE average MAX PER SKT, I guess.
I appreciate ELECTRICAL CONTRACTORS have COMPUTER PROGRAMS made by SOFTWARE DEVELOPERS, hence many ELECTRICAL CONTRACTORS or ELECTRICIANS probably couldn't tell you "the equation" for calculating the correct skt wire for RING CIRCUITS, but could advise you if the following is known: AMPAGE (MAX) and SKT difference in metres to next skt. Hence when I asked Electricians, they say "the office do it all".
I learnt by doing, and questioned the obvious areas. And NOT all instructions/literature are right or correct, or calculated in a way I liked. Sometimes reading and discussing can be completely different to doing, that is instructions on paper, maybe hard to follow, or relevance uncertain or completely different to what there is, to be done.
RING CIRCUIT ampages (Yes this is not an exact calculation just an approx, in an obviously very vague area), are distributed/spread over greater metre lengths of skt wire, in comparison to RADIAL, hence the AMPAGE maybe less in RING CIRCUIT skt wire lengths.
But for such a common circuit, many RING equations are either inconfusing, misleading, inaccurate or incomplete.
In RING CIRCUITs, the calculation for skt wire isn't clearly explained in IEE 17th, not mentioned on SKT WIRE REELS, hardly any useful examples on internet of RING/KIRCHOFF example to calc skt wire, neither did PART P elec course, and was surprised how the spread/distributed calculation of RING circuits was not discussed.
All other other aspects of 240V elec circuits are straight forward:
~ RADIAL skt circuits,
~ RADIAL light circuits (The most complicated is probably STAIRS lights with two light switches)
But the 17th Edition is a book of little use in terms aspects that really matter such as, RING CIRCUIT calculation, and LIGHTING CIRCUITS, hence I summarised those I knew into my word document.
Obviously electricity is just two wires, NEUTRAL and LIVE, but even then there many aspects to consider, ie:
~ not exceeding the ampage of a circuit
~ using skt wire adequate enough for the certain circuit
~ using mcb adequate enough for the certain circuit
Cheers
Stephan
ELEC GAS WATER autocalc: 1st tab, scroll down
FUSEBOX MCB autocalc: 3rd & 4th tab
RING AMP autocalc: 1st tab
LIGHTING CIRCUITS DIAGRAMS: Section 9
RING & RADIAL CIRCUIT DIAGRAMS: Section 10
MULTIMETER GUIDE: Pg 6 & Pg 7
