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Old 03-25-2008, 03:36 PM   #16
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Lars,

That thing is 100% illegal to use in Australia unless it's in an enclosed chassis, and installed by a qualified person. Don't even think about it. Any club that lets you use it trackside is probably uninsured as a result as well. Whathappens if someone (you or whoever else) accidentally sticks their finger on the exposed screw terminals?

For someone who is so keen to debate about the right way of doing things, I can't *believe* you're going down this path, in order to save what - $50? If you know little enough to ask which wires go where (and yes, I am in that category too - no judgement there) then take it as a sign that you weren't meant to be messing with 240v AC. It's horribly, horribly dangerous if you make one little mistake.

Yahoo buckeroo.

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Lars - These power supplies have been banned at Bayside from a month ago.
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Old 03-25-2008, 04:55 PM   #17
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So.... put a little piece of plastic over the terminals and Bingo, a safe power supply for all those fools who like to stick their fingers in electric sockets!
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Old 03-25-2008, 06:05 PM   #18
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240VAC isn't that bad. If it was 600, I would be more worried.
My vote for "uninformed post of the day".

Do your research. Understand what you're talking about. THEN post. In that order.

AC power can kill. Don't mess with it guys. It's just not worth it.
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Old 03-25-2008, 08:17 PM   #19
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What makes these types of power supplies dangerous is the fact the A/C terminals are exposed. Second these power supplies may not perform like they should. It is a generic design, that gets copied. Some racng from claimed 8amps to 15amps of power.

I use mine in a purposed built box for trueing tires. No problems since I don't push the load.

ProPeak, Bulldogs, Alnac power supplies have the A/C covered and are desinged to be robust.
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Old 03-25-2008, 09:20 PM   #20
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Originally Posted by ozoner View Post
My vote for "uninformed post of the day".

Do your research. Understand what you're talking about. THEN post. In that order.

AC power can kill. Don't mess with it guys. It's just not worth it.

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Old 03-25-2008, 09:36 PM   #21
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If a supposedly qualified engineer is telling people not to worry about mains power, I would debate that the guy might have taken one too many jolts himself...

Telling people not to worry about mains power by saying "it aint that bad" in a public forum is plain stupid.

It's like saying "crashing your 1:1 car at 40km/h isn't that bad - you have to worry when you hit something at 100km/h". Complete nonsense.
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Old 03-25-2008, 09:50 PM   #22
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ok get a plastic tupper ware.. drill some holes put some leads into it put power supply into the tupper ware.. install a fan if you want.. then its safe
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Old 03-26-2008, 07:35 AM   #23
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WOW I thought people in the USA were over protective.

I see lots of these power supplies at the track.(Got one myself) We figure if you go around poking your puggy little fingers were the aren't supposed to be, that's just natural selection!!!

But I shouldn't be surprized, in the land down under guns climb go out at night killing people all by them selfs, right? Other wise they would lock up the people not the guns!!!
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Old 03-26-2008, 09:58 AM   #24
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Ahh the darwin effect.
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Old 03-26-2008, 11:11 AM   #25
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Originally Posted by ozoner View Post
If a supposedly qualified engineer is telling people not to worry about mains power, I would debate that the guy might have taken one too many jolts himself...

Telling people not to worry about mains power by saying "it aint that bad" in a public forum is plain stupid.

It's like saying "crashing your 1:1 car at 40km/h isn't that bad - you have to worry when you hit something at 100km/h". Complete nonsense.
Actually, after 6 years of working at a high energy physics lab I have taken 0 shocks and have built many power supplies that can kill you. If you think that a little power supply that can easily have it terminals covered is dangerous, stay the hell out of an automobile!!! Use a little piece of electrical tape or a small piece of lexan and that power supply is just as safe as any other. If you don't believe me, listen to this. I bought an expensive 12V power supply some years back from one of the biggest suppliers in the RC industry. I would take it to the track and the damn thing would trip the circuit breaker. I got tired of this and decided to take an inside look. Turns out that the monkey who assembled it swapped the green earth ground wire and the white common wire. So the power supply was trying to return all its current to earth ground. Well guess what, GFCI circuits don't like current imbalances, and guess what, the case of my power supply was tied to the A.C. Line!!!! So if you think you are safer by spending an extra $40 on a power converter (they don't actually supply any power so it is a stupid name), think again!!

Last edited by kufman; 03-26-2008 at 11:21 AM.
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Old 03-26-2008, 11:52 AM   #26
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Your case wasn't hot. The neutral/white wire (grounded conductor) has the same potential as the green wire (grounding conductor). So of coarse it will work... and you would have never know the difference. Not that it was right, but what you get when someone doesn't know what they are doing.
Just like telling people to "just put plastic over it". You might be comfortable with but it doesn't make it right. They'll wind up suing the track, the club, and anyone else they can think of. Like spilling coffee on your lap.

The GFCI did its job... you would have never known.

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240VAC isn't that bad. If it was 600, I would be more worried.
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Old 03-26-2008, 12:30 PM   #27
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It would have been hot IF the wall outlet was wired wrong, which I have seen more than once at a track. Could also be bad if the EGND was not connected to anything, which I have seen at tracks as well. Didn't bother me, but it was same problem that started this thread, which wire goes where.

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Just like telling people to "just put plastic over it". You might be comfortable with but it doesn't make it right. They'll wind up suing the track, the club, and anyone else they can think of. Like spilling coffee on your lap.
The plastic is all that is needed to meet finger safe requirements. It also brings the setup to a category 0 in terms of the NFPA70E code. Basically the same as a light switch. If it is finger safe it also meets OSHA and DOE requirements.
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Old 03-26-2008, 12:43 PM   #28
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Lot of "could-haves" there... but you'er right.. it does happen. Been there, seen it, fixed it. Everyone thinks they are a electrician.

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The plastic is all that is needed to meet finger safe requirements. It also brings the setup to a category 0 in terms of the NFPA70E code. Basically the same as a light switch. If it is finger safe it also meets OSHA and DOE requirements.
Sure about that?? Is just any piece of plastic rated for the voltage at hand? Is it enought suppress an arc?
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Old 03-26-2008, 12:44 PM   #29
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http://www.rctech.net/forum/attachme...1&d=1199254924

Two cabling parts : AC wiring and DC wiring

AC wiring parts :

When you look at power outlet in your house, each outlet has three holes, those are Live AC ( Hot ), Neutral AC, and Floating Ground in the middle. Live AC and Neutral AC are interchangeable !!! why ? because our electricity is Alternating Circuit ( AC ). Unless if you want to be perfect, you must know your house's electrical wiring in the first place to determine the first arrangement of your house's power outlet, for ex. left hole is always for Live AC and right hole is always for Neutral AC. However, AC power is non polarised, so they are interchangeable.

DC wiring parts :

This wiring part you have to be careful between negative and positive. +12V means positive (red wire) and GND means negative (black wire). I see you have two sets of wiring output for +12 and GND...... So you can connect to power charger 1 and charger 2.


Trust me it wont exploded .

Cover the terminals, especially the AC parts. 240V is very high voltage.
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Old 03-26-2008, 01:08 PM   #30
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Originally Posted by asw7576 View Post
http://www.rctech.net/forum/attachme...1&d=1199254924

Two cabling parts : AC wiring and DC wiring

AC wiring parts :

When you look at power outlet in your house, each outlet has three holes, those are Live AC ( Hot ), Neutral AC, and Floating Ground in the middle. Live AC and Neutral AC are interchangeable !!! why ? because our electricity is Alternating Circuit ( AC ). Unless if you want to be perfect, you must know your house's electrical wiring in the first place to determine the first arrangement of your house's power outlet, for ex. left hole is always for Live AC and right hole is always for Neutral AC. However, AC power is non polarised, so they are interchangeable.

Ummm no LOL. They are not interchangable, they are color coded and are polarized. The neutral is actually a longer/taller slot. (for the last....fifty years)
And the left hole is not always the hot! I fact it rarely ever is. Only place I have "had" to make it on the left was in hospitals. They want there grounds up.

Like I said everyone thinks they are an electrician. LOL
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