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Old 19th June 2010, 10:05 AM   #1
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Default Quick question on connecting this power supply

Hi I bought this acopian linear power supply but Im confused as to which is the positive and negative for the AC input, I coulnt find any info of this on their site, I included picture of it below. thanks

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Old 19th June 2010, 10:24 AM   #2
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AC per definition has no positive or negative terminal... Or what dou you mean?
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Old 19th June 2010, 10:40 AM   #3
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Hi I meant hot and neutral. I have to connect an AC power cable to it I would like to know to which AC input the hot wire would go and to which the neutral would go on the power supply. Theres two on the power supply L AC and N AC
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Old 19th June 2010, 10:44 AM   #4
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It doesn't really matter, as soon as you plug in the plug turned around 180 degrees, you'll be off again. If you really want to do this, then take a screwdriver with a neon lamp inside (dunno what they'Re called in English) and test the socket. The wire that makes the lamp glow is L, the one that doesn't is N IIRC.

http://upload.wikimedia.org/wikipedi...ningzoeker.jpg
Phase testing thingie
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Old 19th June 2010, 10:46 AM   #5
AP2 is offline AP2  Italy
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Quote:
Originally Posted by SilverStrings View Post
Hi I meant hot and neutral. I have to connect an AC power cable to it I would like to know to which AC input the hot wire would go and to which the neutral would go on the power supply. Theres two on the power supply L AC and N AC
Hi,
N= Neutral
L= Phase
This is ac input.
what is the input voltage? (I think 110VAC)
DC voltage out? current output?

Regards

Last edited by AP2; 19th June 2010 at 10:53 AM.
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Old 19th June 2010, 10:46 AM   #6
Mooly is offline Mooly  United Kingdom
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And don't forget the mains safety ground... careless wiring on this could be dangerous as it's all open to touch.

Hot is Live or L ,and neutral is neutral N
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Old 19th June 2010, 11:38 AM   #7
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so L=Live (hot) and N=neutral that makes sense lol. So if I were to put neutral in the L input and the hot in the N input what would happen? I imagine the fuse would just blow, not that I'm going to do it but I think it would be good to know.


Mooly I definitely wont forget to connect the ground .
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Old 19th June 2010, 11:49 AM   #8
AP2 is offline AP2  Italy
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Quote:
Originally Posted by SilverStrings View Post
so L=Live (hot) and N=neutral that makes sense lol. So if I were to put neutral in the L input and the hot in the N input what would happen? I imagine the fuse would just blow, not that I'm going to do it but I think it would be good to know.


Mooly I definitely wont forget to connect the ground .
Hi,
Not exist a psu with dedicate one pole at "L" or "N".
some industrial power supply dedicate line pole.(only for legislation)
not blow fuse if you connect this.
both lines input have necessary ISO to GND(ground)

Last edited by AP2; 19th June 2010 at 11:55 AM.
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Old 19th June 2010, 04:19 PM   #9
Mooly is offline Mooly  United Kingdom
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Quote:
Originally Posted by SilverStrings View Post
so L=Live (hot) and N=neutral that makes sense lol. So if I were to put neutral in the L input and the hot in the N input what would happen? I imagine the fuse would just blow, not that I'm going to do it but I think it would be good to know.


Mooly I definitely wont forget to connect the ground .
It would work just the same if you swapped the L and N, however reversed polarity can be dangerous (on anything) for anyone working internally on the equipment.
Think about a table lamp with a single pole switch... if you reverse the polarity the lamp socket is always live, even though the lamp appears to function normally.
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Old 19th June 2010, 05:04 PM   #10
gootee is offline gootee  United States
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L = LINE (aka "Hot")
N = NEUTRAL

In the USA at least, LINE/Hot is the smaller of the two prongs on polarized AC wall plugs.

They wouldn't specify which was which if it didn't matter. Even if it only matters for legal purposes, there is possibly a good reason for it. So it's safer to not ignore it.
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