Browse Forums General Discussion Re: Electrical supply to my shed 2Apr 09, 2014 9:28 am Owner Building at Jimboomba Woods in Logan City Qld. Blog : http://bandlnewhomebuild.blogspot.com H1 thread : viewtopic.php?f=38&t=68283 . Re: Electrical supply to my shed 7Apr 09, 2014 10:11 pm Owner Building at Jimboomba Woods in Logan City Qld. Blog : http://bandlnewhomebuild.blogspot.com H1 thread : viewtopic.php?f=38&t=68283 . Re: Electrical supply to my shed 8Apr 09, 2014 10:27 pm Owner Building at Jimboomba Woods in Logan City Qld. Blog : http://bandlnewhomebuild.blogspot.com H1 thread : viewtopic.php?f=38&t=68283 . Re: Electrical supply to my shed 10Apr 09, 2014 11:15 pm Owner Building at Jimboomba Woods in Logan City Qld. Blog : http://bandlnewhomebuild.blogspot.com H1 thread : viewtopic.php?f=38&t=68283 . Re: Electrical supply to the OP's shed 12Apr 10, 2014 8:25 pm Owner Building at Jimboomba Woods in Logan City Qld. Blog : http://bandlnewhomebuild.blogspot.com H1 thread : viewtopic.php?f=38&t=68283 . Re: Electrical supply to my shed 15Apr 11, 2014 9:03 pm Owner Building at Jimboomba Woods in Logan City Qld. Blog : http://bandlnewhomebuild.blogspot.com H1 thread : viewtopic.php?f=38&t=68283 . Re: Electrical supply to my shed 16Apr 12, 2014 2:09 pm I think enough has been posted here for the OP to work with, however I will continue to make corrections where I see fallacious comments being made. In a nutshell, Master6 may choose any of the following if he wishes AND his electrician calculates the voltage presented at his power outlet is within spec. 1. Run 2.5mm (15A) to the shed , perfectly adequate for what you intend (depending on run length) 2. Run 4.0mm (32A) to the shed , perfectly adequate for what you intend and allows significanty more devices to be used (depending on run length) 3. Run 6.0mm (45A) ................. etc keep going bigger as much as you like if you want to spend the money if you like. As i have said, I agree with upgrading now if you suspect possible future use may dictate it. jaceb The cheapest option isn't always the best or safest option. But sometime it is. Going for bigger wiring doesnt make it safer if you never use the extra current you can draw. This is for the OP to work out in tandem with his leccy. jaceb Not many electricians out there are going to recommend running a 2.5mm cable to a shed. That's ... because they have to sign off their name to the job, and they sure as hell don't want to be losing their license because the client was too tight to pay an extra $200 to have it done properly. That is nonsense. The leccy is responsible for sizing it appropriately and making an installation compliant to wiring rules, nothing more. 2.5mm cable could well be approriate , if that is all the master6 ever wants. bpratt No sparky will put 2.5mm across 25m to a shed Again, without the run length you have no way of knowing that, and I have given you the calculations to show it is possible. Nevertheless, you seem intent on pushing misinformation. For those who wish to continue to disagree , Ive included the relevant sections of AS3000. 1.6.2(c) Voltage and voltage tolerances. NOTE: The nominal voltage and tolerances for low voltage supply systems and electrical installations areβ (a) for Australia, 230/400 V +10% to β6% (in accordance with AS 60038); 1.6.4 Utilization voltage The electrical installation shall be designed and installed to ensure that the voltage at the terminals of electrical appliances and equipment is suitable for the nominal operating voltage of electrical appliances and equipment to be supplied. NOTES: 1 Clause 3.6 contains requirements relating to voltage drop. 2 A stand-alone system designed to provide a low voltage supply should be designed to maintain the voltage at the point of supply within the range noted in Clause 1.6.2(c) under normal full-load conditions. 3.6 VOLTAGE DROP 3.6.1 General Under normal service conditions, the voltage at the terminals of any power-consuming electrical equipment shall be not less than the lower limit specified in the relevant electrical equipment Standard. Where the electrical equipment concerned is not covered by a Standard, the voltage at the terminals shall be such as not to impair the safe functioning of the electrical equipment 3.6.2 Value The cross-sectional area of every current-carrying conductor shall be such that the voltage drop between the point of supply for the low voltage electrical installation and any point in that electrical installation does not exceed 5% of the nominal voltage at the point of supply. Re: Electrical supply to my shed 17Apr 12, 2014 2:55 pm qebtel I am an electrician, I'm well aware of what the standards are. The OP stated the shed was 25m away from the house. I am assuming this isn't the switchboard. So it's more than likely going to be a substantial amount greater. The nominal voltages and tolerances are correct. But this still needs to be within 5% volt drop! You're previous post implied that as long as the shed circuit alone was within 5% it was ok. That's wrong. You list the current ratings for these cables. Are you aware of AS 3008? 4mm cable is only carrying 32amps if it's not in contact with any insulation. Chances are it will be in the roof space. It's now de-rated to 24amps! Of course you can put that 2.5mm cable in. You can draw about 10amps on it perhaps. But for a powered shed that's pretty silly. I'd install a 10amp circuit breaker to the circuit to ensure that you can't pull any more than 2400W because if you were to go over 13 you are most likely(assuming, as we don't know the run length other than GREATER than 25m) exceeding your 5% voltage drop. I guess you're the kind of person who doesn't buy things in bulk, simply because, although you're getting more for your $, you don't want to pay the little extra, because you don't need that little bit more just yet! I'm giving my advice as somebody who has done the 4 years of training and another 5 years of working in the industry. I think you would be crazy to install a 2.5mm cable to a shed that's clearly a great distance from the switchboard, when for about $150 more you can well and truly cover yourself. My build: viewtopic.php?t=62001 My Thread: viewtopic.php?f=31&t=62001 Re: Electrical supply to my shed 18Apr 12, 2014 3:18 pm jaceb qebtel I am an electrician, I'm well aware of what the standards are. The OP stated the shed was 25m away from the house. I am assuming this isn't the switchboard. So it's more than likely going to be a substantial amount greater. I guess you're the kind of person who doesn't buy things in bulk, simply because, although you're getting more for your $, you don't want to pay the little extra, because you don't need that little bit more just yet! I'm giving my advice as somebody who has done the 4 years of training and another 5 years of working in the industry. I think you would be crazy to install a 2.5mm cable to a shed that's clearly a great distance from the switchboard, when for about $150 more you can well and truly cover yourself. +1 to that. There's no way I'd shortchange myself on running 2.5mm to anywhere but internal power points, particulary to a 9 x 6 shed more than 25 metres away from the house, let alone the meter box. I am pleased to have the input from a qualified person who does know what they are talking about. Owner Building at Jimboomba Woods in Logan City Qld. Blog : http://bandlnewhomebuild.blogspot.com H1 thread : viewtopic.php?f=38&t=68283 . Re: Electrical supply to my shed 19Apr 12, 2014 3:54 pm ok I think the discuss has reached a good conclusion. Given that a few seemed to have now decided to argue the point. it's time for this thread to be closed. Thank you to those qualified people who were kind enough to add information as well as those with experience in similar hobbies who could well imagine requirements changing. This thread will no longer be open for posting. I hope the OP is able to come to a good arrangement with a local sparky now he has some idea of potential requirements. kexkez Homeone Forum Support Team Member That's a fantastic result! Happy you got it sorted out. cheers Simeon 6 8677 Is it possible to render an old corrugated iron shed.I have heard that it can be done if it is covered with chicken wire first.Not sure of the ratio of the render mix and… 0 4925 Thanks. Yeh ideally that would have been good, but have progressed too far now. Hoping some well placed internal walls fixed up into the battens will provide some… 2 5459 |