I have a power supply with 9 outlets of 12v but my wiring is thin and the voltage drops to 0.5v.
I want to increase the voltage by connecting two of them in series but they have the same minus, how can i connect them to produce 24v?
Thank you

 

I have a power supply with 9 outlets of 12v but my wiring is thin and the voltage drops to 0.5v.
I want to increase the voltage by connecting two of them in series but they have the same minus, how can i connect them to produce 24v?
Thank you

You can't unless the outputs are isolated from each other. If you do try this as an experiment don't skimp on the safety equipment as you will produce copious amounts of smoke, flame, and mass destruction. Just get the supply you need or find a way to isolate the outputs.

 

Voltage dropping to 0.5V means you are overloading the supply, in effect almost short circuiting it with your load.

 

What is the load current, and what is the output current rating of the power supply?
Sounds like you are vastly overloading the supply.

 

You can't unless the outputs are isolated from each other. If you do try this as an experiment don't skimp on the safety equipment as you will produce copious amounts of smoke, flame, and mass destruction. Just get the supply you need or find a way to isolate the outputs.

That wat i though, thank you

 

my wiring is thin

Define "Thin". To some people 20 gauge is thin. To others, 30 gauge is. You might have 12 gauge, which you can't really call that thin. But we don't know what you mean by "thin".

What is the load current

This is another critical question. In addition to that is "How are you measuring the voltage? With a load on it?

Here's an example:
A 12 Volt 35 Watt light bulb has current running through it, the bulb is hot and the resistance is at its max:
35W ÷ 12V = 2.9 amps. Not a lot. But its resistance while cold will be a whole lot lower. And without a bulb at hand I couldn't begin to give you an idea of what that resistance may be. But it could be just a few ohms; 1, maybe 2 ohms? I just don't know. But that initial amount of current could be sending your supply into safety shut down mode. Others have already said that in a little different way.

In order for us to be helpful there are things we need to know:
1) How powerful is your supply (i.e. voltage and amperage capability (or wattage if measured that way) )?
2) What is the load? Any under powered PS (Power Supply) will likely go into safety shut down mode if over stressed.
3) What is the actual gauge of the wire we're discussing?
4) HOW is the load being connected?

 

You might be able to make a silk purse out of a sow's ear but you can't get more power out than what goes in... Even ignoring "insertion loss".