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  1. G

    how to work out total resistance of a parallel circuit

    hi i am new to learning about electrics i have just started an electricians course and have a question. The question is : Two heating elements of 70 ohms & 30 ohms are connected in parallel the total resistance of this circuit would be...... i have tryed all differnt web sites i have worked it...
    • georgeo5664
    • Thread
    • aus circuit electrical work out parallel resistance total work
    • Replies: 23
    • Forum: Australia
  2. 1

    Upgrading existing installation

    My MCS assessment site was 10x235w Conergy Mono panels with a sunny boy 2500HF on the roof of a south facing lean to extension. I havent yet notified the installation yet as I only got my MCS 2 weeks ago and the customer wants me to upgrade it to maximum, by installing panels on the upper roof...
  3. K

    A total culinary disaster!

    Can any lads from Lancashire can tell me what’s happened to Holland’s of Baxenden. I wanted to place my usual order of 3 cases of steak and kidney puddings but they seem to have vanished off the face of the earth. I can’t get a decent pudding in Nottingham for love nor money! I know the...
  4. B

    a total newbie, can you have a mix of 2 port motorised valves? a MOMO on one and

    Just found this great site, saved me a fortune!! Plumber was called to check heating problem, rads getting warm when HW on!! His solution, replace the drayton valve and actuator, drain system etc. I was not convinced so did a bit of reading, got to part, check spring on drayton, did that...
  5. C

    adding a light switch (4switch's in total)

    if you had a intermediate switch set up and decided to add another switch does this new switch have to be 4 way ? cheers for the advice
    • chrisreid186
    • Thread
    • adding another aus cheers intermediate light light switch switch switches total
    • Replies: 3
    • Forum: Australia
  6. B

    Pricing partial rewire( is it not to much)

    Hi! I am pricing 3 bed flat in a block. Some circuits are existing will be not replaced (clients wish), kitchen circuits are new.Cables to be run in floor, wall, ceiling dwellings, everything is in concrete and bricks. Price is just for labour, no materials. Am I not charging to much?!?! Job is...
    • bart.second
    • Thread
    • aus heater isolator outlet partial pricing rewire socket total
    • Replies: 19
    • Forum: Australia
  7. V

    total resistance of a parallel circuit

    Hi, Question- Why is the total resistance of a parallel circuit always lower than the lowest resistor? I feel i have read lots on parallel circuits and googled it many times but still cant figure it out. The four answers i have to use are: A=The current is the same across each resistor B=the...
  8. F

    Total costs to get mcs accreditted and ready to install?

    I'm looking to get into installing pv and have been on a course last year. I remember it seemed like it was going to cost a fortune to start up. I would like to know the exact costs for everything to get me passed my first install and mcs accreditted. Not including the installation costs of the...
  9. Z

    UPS Battery Run Time

    I need some calculation on based of following findings: UPS rating = 1200 Watt Battery Rating = 1300 Ah Total Connected Load = 1000VA Operating Voltage = 240 V Can anyone please calculate for how long battery will provide power to the load ( i mean run time) ? Please show full...
    • zaheer708
    • Thread
    • aus batteries battery hours time total ups
    • Replies: 8
    • Forum: Australia
  10. A

    9Kw pool heater, earth rod, seasonal drought + total tiling

    My neighbour had a 9Kw inline (in-pipe) water heater fitted - cables look well installed, with trip protection as requested by the heater installers. On connection it pulled the house trip. They suggested (rightly or wrongly) to install a separate supply before the house distribution panel -...
    • Ace1
    • Thread
    • aus earth earth rod heater pool tiling total
    • Replies: 15
    • Forum: Australia
  11. C

    Not just a Noob - A Total noob

    Hi all. Brand new to all of this so please go easy. Im 31 and spent 10 years as a Police officer but left due to the way the job was going. I never listened to my old man before he died about getting a trade behind me and now I find myself wanting to learn. I have always been interested...
  12. L

    Total Trade Services - Wales

    Just wondering if anyone has heard of total trade services? anyone worked for them or with them? good or bad experience? cheers
    • liam b
    • Thread
    • anyone aus plumbers price services total trade travel wales
    • Replies: 234
    • Forum: Australia
  13. W

    3 phase upgrade

    hi guys , i have to install new 3 phase cable to mushroom sheds and am not full sure off the size of cable i need. i have worked it out that i need 5 by 25mm swa. the cable run is 70 meters long and will be buried in the ground and will be ran with 5 other cables of the same size as there are...
  14. S

    can someone please confirm my working out, just for piece of mind.

    please can someone confirm my working out of a annual return, as this is my first quote and just need confirmation that i have done it right. the system is a 22 panel 180W bp mono system and i am assuming the customer will be exporting 50% 22 panels x 180W =3960W or 3.96kW this will...
  15. Jay Sparks

    Cables in parallel formula

    Hi Guys Quick one for you. A cable that is 25M long and has a resistance of 2.3 m ohms/M ( milli ohms per metre ). A second Identical cable is to installed in parallel with this conductor. What is the total resistance of the two conductors connected in parallel? 1st conductor: 25 x 2.3 =...
  16. L

    Is this total load correct?

    Guys I'm putting 9 x 35W GU4 downlighters in my parents bungalow all on one switch, they are SELV 12V As I have good access to the loft I'm going to put them on their own circuit, I'm just trying to work out the total load in Amps If the voltage is 12 and wattage 35 then I get it to...
    • LlandrilloSpark
    • Thread
    • aus correct load total
    • Replies: 3
    • Forum: Australia
  17. Kamikaze

    Obviously a man in total control and dedicated to his profession!

    http://www.youtube.com/watch?v=CSuvvQrgmBM
  18. T

    Total Re-Wire, Steels and cables

    Hi all cant find anything in the regs on this one so guess it purely experience... Im on my a re-wire where they have decided to gut the place and completely rearrange everything. I returned to site today to start work and they have installed a number of steels (rsj's) around the place making...
  19. D

    total circuit impedance????

    if anyone could help me with this i would really appreciate it. Q. A series a.c circuit has a resistance of 3ohms and an inductor of 0.0127 H connected across a supply frequency of 50hz. What it the total circuit impedance? the answer is 5ohms but i have no idea how to work it out...
  20. W

    ring circuit test

    Hi all just wanted to confirm as got the nic man and anything that comes up, want to be confident in the answer. Am i right saying that the r1 & r2 reading on a reading circuit should be ruffly the quarter of the end to end readings added up ie L2L=0.26 N2N=0.26 L2L=0.43 TOTAL = 0.95...

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