I recently purchased two power supplies from Amazon: https://www.amazon.ca/gp/product/B07TWW8Q73/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&th=1 https://www.amazon.ca/gp/product/B005T6UJBU/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1

I currently have both of them wired to two separate outlets.

Is it possible to wire both of them to the same outlet? Maybe like this?


What would be the best way to split the wires safely?

The power supply on the left is a 24V 15A AC/DC power supply.

The smaller one on the right is 5V 3A AC/DC power supply.

  • \$\begingroup\$ How did you connect one of them? \$\endgroup\$
    – user253751
    Oct 21, 2022 at 23:51
  • \$\begingroup\$ Are they permanently installed, that is, screwed to a wall or similar? Are they enclosed in a larger enclosure? How are you making those exposed terminals which are at mains voltage safe from accidentally being touched? \$\endgroup\$
    – Ian Bland
    Oct 22, 2022 at 0:10

2 Answers 2


Electrically, this will just work. Just wire them in parallel, like you have drawn. (I didn't check that you drew the wires going to the correct screws. I assume the drawing is correct.)

But safety-wise, I don't know the best way to make the parallel connection. If this was some little Arduino project I would just say to strip 3 wires, make a soldered connection and heatshrink it, but this is mains voltage so doing it properly does matter - you really need a strong connection that won't come undone accidentally, or you'll get a big spark and trip the breaker (best case) or electrocute yourself (worst case). If you are using fork terminals and two of them fit on one screw, then you might consider wiring the outlet to one power supply and then wiring that power supply to the other power supply, by putting the wires on the same screw, but don't quote me on that.

  • \$\begingroup\$ I don't think this should be accepted since I haven't explained how to make the connection properly since I don't know. \$\endgroup\$
    – user253751
    Oct 24, 2022 at 16:16

You can wire both power supplies to a household 120VAC outlet. However I recommend using separate power cables with each one terminated in a standard grounded plug. In this way the supplies will operate independently of each other and can be used at different locations if needed. This is the same as plugging 2 separate lamps into a dual outlet or separated outlets.

  • \$\begingroup\$ Thanks. I'm new to the world of circuits. What do you mean by "separate power cables with each one terminated in a standard grounded plug"? Could you (or someone) please provide a simple diagram? \$\endgroup\$
    – Evan
    Oct 21, 2022 at 23:09
  • 1
    \$\begingroup\$ @Evan: Barry means you should use two power cords, one for each supply. The cords should have standard plugs to plug into the common household outlets. \$\endgroup\$ Oct 21, 2022 at 23:13
  • \$\begingroup\$ So something like this? amazon.ca/Monoprice-14inch-16AWG-Power-Splitter/dp/B003L1AG8G/… \$\endgroup\$
    – Evan
    Oct 21, 2022 at 23:19
  • \$\begingroup\$ You really don't need two power cords. \$\endgroup\$
    – user253751
    Oct 21, 2022 at 23:50
  • \$\begingroup\$ @PeterBennett so you advocate the male plugs with exposed prongs which would then be live? So that they can be "plugged into the common household sockets". That seems extremely dangerous. extension cables have female ends for a reason... \$\endgroup\$
    – Solar Mike
    Oct 22, 2022 at 6:48

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.