How many VDC will 120VAC support?

Thread starter kubiej21
Start date Jul 6, 2012
Tags

Support

AI Thread Summary

Operating six 48VDC power supplies from a single 120VAC source is feasible, but it depends on the current ratings of the 120V sockets and the fuse. The total current draw of the power supplies must not exceed the capacity of the circuit to avoid fire hazards. It's crucial to ensure that the combined load is within safe limits. Users should verify the specifications of their electrical system before proceeding. Proper safety measures are essential when dealing with high voltage and current.

Jul 6, 2012

kubiej21

I am looking to install 6 48VDC power supplies and I am curious as to whether or not I can operate all 6 power supplies off the same 120VAC source. I am not sure if 120VAC means that I can only operate a max of 120VDC.

Engineering news on Phys.org

Jul 6, 2012

DragonPetter

It depends on the current rating of your 120V sockets as well as the fuse. If your 6 48VDC power supplies draws current anywhere near to these ratings, then you are going to have fire safety issues.

Jul 6, 2012

kubiej21

Alright, thanks.

Thread '3-terminal device external modeling'

Very basic question. Consider a 3-terminal device with terminals say A,B,C. Kirchhoff Current Law (KCL) and Kirchhoff Voltage Law (KVL) establish two relationships between the 3 currents entering the terminals and the 3 terminal's voltage pairs respectively. So we have 2 equations in 6 unknowns. To proceed further we need two more (independent) equations in order to solve the circuit the 3-terminal device is connected to (basically one treats such a device as an unbalanced two-port...

View full post »

Thread 'Question about the voltage between two charged capacitors'

suppose you have two capacitors with a 0.1 Farad value and 12 VDC rating. label these as A and B. label the terminals of each as 1 and 2. you also have a voltmeter with a 40 volt linear range for DC. you also have a 9 volt DC power supply fed by mains. you charge each capacitor to 9 volts with terminal 1 being - (negative) and terminal 2 being + (positive). you connect the voltmeter to terminal A2 and to terminal B1. does it read any voltage? can - of one capacitor discharge + of the...

View full post »

Thread 'Weird near-field phenomenon I get in my EM simulation'

I recently made a basic simulation of wire antennas and I am not sure if the near field in my simulation is modeled correctly. One of the things that worry me is the fact that sometimes I see in my simulation "movements" in the near field that seems to be faster than the speed of wave propagation I defined (the speed of light in the simulation). Specifically I see "nodes" of low amplitude in the E field that are quickly "emitted" from the antenna and then slow down as they approach the far...

View full post »