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canada

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  1. H

    Explosion Proof Wiring Systems

    Hello every one, I am a new user or you may say a new installer of explosion proof wiring systems. Any one please tell me about the Conduit fittings, lighting fitures and heat proof wiring cables used in Explosion proof wiring in Petroleum Gantries. Thanks, awaiting for responses...
  2. F

    Domestic/commercial electrician looking to move to canada

    I am looking to move to toronto to work, Im qualified with 17th edition and been working for the last 9 years. Ive mostly been doing domestic rewires, some shop fits schools etc. How easy would it be to get into the same kind of work in toronto, and whats the deal with recruitment agencys...
  3. S

    SWA earthing arrnagements

    Morning All! I have recently started work on a commercial site with a company installing air-con, the system that I have questions on is thus; 35mm2 4 core SWA as main supply to the board, where the armour is used as a CPC, which then feeds 10 x 3 phase circuits, supplied via 1.5mm2 4 core...
  4. G

    How to size a Auto Transformer Tapping % for a Pump motor ? Thanks

    Dear all, as suggested by the factory a Auto transformer tapping is 52% for our pump motor, which is 380V 3 phase. As a result, I should demonstrate how's come the setting is 52 % for the captioned motor. May I know for the calculation for it? what kind of information i should know before...
  5. P

    Emergency Lighting

    Hi Guys, I am doing the emergency lighting for our local church, it's a one story building, with offices and kitchen as well as the typical chapel & hall. The Fire safety officer has come in and asked them do install emergency lighting and fire alarm. I've been doing the Electrical work there...
  6. K

    Cathodic Protection

    Following a talk in the background with Chr!s I’m opening this as a discussion not a question. The aim is to share peoples experience and knowledge of cathodic protection and earthing systems. For myself, my experience is slightly off kilter to where I’m hoping the thread will go. Basically...
  7. A

    TN-S or TNC-S

    Hello folks. Need a bit of direction on this one. I went on a survey job the other week, and i need some opinions if the photo shows a TN-S or a TNC-S system? I took a measurment of the Ze, which was 0.54ohms, which suggests a TN-S, but looking at the earth block next to the cut out, there is a...
  8. T

    New 3 phase installation

    Doing a favour for a friend and using it as a learning experience as well. Guy is going into a new unit with an existing 1ph board. he has a 3ph machine so wants to upgrade mains etc. New board will supply everything in the small industrial unit from heating/lights through kitchen sockets. I've...
  9. G

    2 x Supplies: 1 x Circuit?

    Hi, First of all this is my first post so hello to everybody. I want to start by saying I am not a plant electrician but recently have had cause to look at some drawings that are confusing me somewhat and hope someone here can shed a little light. The situation is that there is a 240VAC...
  10. K

    Frankenstein is alive and well

    Found this site while rummaging around the net http://www.filnor.com/html/products/knife-switch.php Brings back happy memories, well except for putting my back out opening a 1200A 3ph switch.
  11. G

    Wiring interlock switches into machine controls to inch only when doors open

    One potential job that needs looking at (not been to site yet) is to fit 3 interlocks to doors on a Webster & Bennett vertical borer. The way they want it wiring is so that the table can only be inched when any of the doors are open. I'm not sure if there's an inch button though assume yes as...
  12. S

    i am really needing help about 3 phase with 4 wires

    hi there i am starting my own company and i have just bought a new tyre machine my unit has single phase but the machine is 3 phase with 4 wires black blue brown yellow and green on the side of motor it has v-220/380 now can i use this in my unit and if so how do i go by doing it please help as...
  13. T

    Transformer in Star/ Delta connections

    In my AHU panel I have a transformer connected into the star/delta circuit (First time I've seen this) the original transformer was a 37kw with 415v 70% 60% 40% and star tappings, this transformer is now faulty so I have ordered a new one which arrived today. The problem is, on the old...
  14. W

    Electric roller door motor help.

    Hi , Can anyone help. Got an electric roller door , the door motor has been hit by a forklift truck and has damaged the wiring to the motor. The motor has no terminal box , the terminal cables just come off the windings directly. I have dissasembled the motor and found only w1,w2 winding still...
  15. G

    Generator on Farm

    Hi Had a phone call to go and look at moving a 44kva 3 phase generator on a farm. Im going to have to resupply it in swa. I havent done any work on a farm and i ve only ever installed temporary generators when the electricity board have decided not to turn up a day before a shop opens. I am...
  16. J

    schneider altivar 71

    Hi looking for a bit of advice before i go back to this machine tomorrow..... Got called in to change the inverter in the title as it had a fault with it (diagnosed by the manufacturer of the machine ??). changed it all no problems, switched it on and ran through its cycle fine but when it...
  17. C

    Star Delta Theory

    Hi All. Firstly would like to say thanks to everyone who reads this and provides any useful information. I have used the search button and have read through previous posts/ stickys before posting this. Basically I would like to understand the voltages clearer in star and delta, I know...
  18. D

    Supply Cable Size and correct socket ratings!

    Hi Guys, In our place we have several machines that are fed from 63A sockets. The supply cable to the machines is CY and currently 6mm has been used which is no good for 63A But the 63A sockets are fed by a 32A breaker. Is it ok to use the 6mm as the socket is fed by a lower rated breaker...
  19. I

    Ok, I must have done something wrong but cannot work out what, 3 phase BANG!!!

    Hi, bit of a rush job, but when double checked by me, then another spark could not work out what I did wrong. Needed a r1r2 reading on a feed from one of our DB boards to an isolator about 10m away. This circuit has been live for some time, just a double check was needed (d63 breaker was on...
  20. G

    Maintenance control and documentation system

    Hi, I am looking at a system where each piece of equipment in our plant has a bar-code. This bar-code is then scanned by a portable device that will bring up a form containing the equipment check-list. This form is then filled in and stored in a data base. This can be done using an iPhone and...

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