Recent content by john.irvine
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New 3 phase supply, does it have to be on a 3 phase MCB or can it go on 3 individual BS88 fuses?
BS88 fuses will do the job, check the are three phases and are in sequence, Brown Black Grey / Red Yellow Blue.- john.irvine
- Post #4
- Forum: UK Electrical Forum
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Which Electrical Body Are You With?
Its a None vote for me, as an industrial electrician I don't need any of them. Basically a cowboy wouldn't last a day in industry, and any electrical work I do at home, just need an installation certificate sent to my councils building department where they keep it on file together with the...- john.irvine
- Post #78
- Forum: UK Electrical Forum
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Is this the worst install you have ever seen? *Feedback wanted!*
Forget part P just ring your local building dept, tell them the work you want to do, they will want copies of your qualifications and the electrical installation certificate an schedule of tests certificate which they keep.- john.irvine
- Post #102
- Forum: UK Electrical Forum
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Can someone explain what KVA is......
Its the square root of three, it converts single phase to three. 83kW x 1000) / (230 x 0.8) = Amps single Phase 83kW x 1000) / (230 x 1.73 x 0.8) = Amps Three Phase- john.irvine
- Post #22
- Forum: Canada
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Can someone explain what KVA is......
Correct mate, i do have one of these forms to fill in. So i have a load of 83kw so i devide or multiply this by 0.8 to get my kva? Its a 3 phase supply i need so do i devide the 83kw by 230 or 415 to get my ampage? Cheers in advance. (83kW x 1000) / (230 x 1.73 x 0.8) = Amps- john.irvine
- Post #20
- Forum: Canada
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SWA for 3 Phase Installation
You should find this web site helpful, amongst the SWA tables is one that gives you the nominal area of armour and maximum resistance at 20 C. http://www.prysmian.co.uk/export/sites/prysmian-enGB/attach/pdf/BS5467_07_09.pdf Use the area of the armour and its K value with Table 54.7 on page...- john.irvine
- Post #12
- Forum: Canada
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Volt drop on three phase sub main
Minimum Size of Earth = K1 x S K2…2 K1 = 115 K2 = 51 S = 50 115/51 = 2.255 50/2 = 25 2.255 x 25 = 56mm well under your 86mm What rating is the sub main as that would be the Ib the fuses are for Don’t for get the K value in the adiabatic will be 51- john.irvine
- Post #10
- Forum: Canada
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How big must the earth conductor be ???
Using regulation 543.1.4, page 130 17th edition The nearest to your 100mm would be either 95mm² or 120mm² Using www.prysmian.co.uk cable detail are 90mm² 4 core SWA, conductor resistance @ 20C is 0.193Ohms/km Armour resistance 1.1 Ohms/km nominal area of armour 147mm² 120mm² 4 core SWA...- john.irvine
- Post #10
- Forum: Canada
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tv point question
Try these guys, they know all there is to know about TV signals. useful- john.irvine
- Post #7
- Forum: Australia
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domestic works, to P on not to P
Re: mains change I have to fill out and Signe four serial numbered sheets of BS 7671 electrical safety certificates for every instalation I have designed, constructed, inspected and tested at work, whats the differance in doing the same in the domestic field. [/LEFT]- john.irvine
- Post #5
- Forum: Australia
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domestic works, to P on not to P
Re: mains change Personaly I think Part P was set up to try and stop the cowboys operating, and to get the plumbers and kitchen fitters compentant to fit and connect the electrics that came into there fields of work. Therefore, the 4 or 5 organisations recognised by the government to run Part...- john.irvine
- Post #3
- Forum: Australia
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domestic works, to P on not to P
The last time I did domestic work was last year, so I did contact my buildings dept and asked, besides a copy of my qualifications and my inspection and rest results of the work carried out is there any thing else you need such a payment. The answer was NO, there’s is no payment required, as...- john.irvine
- Thread
- aus domestic electrical work works
- Replies: 55
- Forum: Australia
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mains change
What charge? With my council Building dept, my qualifications are enough for them to accept that the work has been done to the standard set out in the 17th edition IEE Regs and I am therefore qualified to certify my own work. As in my job where I certify for the design, construction, inspection...- john.irvine
- Post #11
- Forum: Australia
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mains change
As an industrial electrician I do not need nor do I have part P certification, but I can do work in the domestic area. All that you need are the qualification you gained as an apprentice and the latest IEE Regs certificate now at the 17th. Contact your council buildings dept, and in form them...- john.irvine
- Post #8
- Forum: Australia
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Exam Questions
18. The resistance of a 230v 3 kW immersion heater element will be Power = volts squared devided by resistance P=VxV ......R 3000=230X230 ..............R therefore . 1 .= 1 R 1.. 3000..230X230 therefore R= 230 X230 =17.63ohms ........3000- john.irvine
- Post #4
- Forum: Electrician Courses : Electrical Quals
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