Electronics & Appliances Electrical grounding

I have tried moving to the front USB port and there is still a hum. Will look for a 3.5mm headset when I am in Dumaguete next.

 

I have the same issue. I'm also looking for an electrician to install a ground as well for my PC. Its a major side effect of not having a ground as any electrical charge remaining will leave static noise in a microphone be it usb or mic port. One way to be sure is have the mic on and have it set to listen to device and then touch the back of your computer and if it lowers in static or clears up then that is your problem.

Catch is not many people have a pipe or such near their computer unless you live in a real small place along with here they love that pvc piping.

On a sidenote if anyone knows a decent electrician send me a PM please on contact info. Short job a couple of hours at most I'd expect as my pc's are 3-4 meters from the outside.

 

I have done this technique on my appliances and computer, so I am sure it works. I tested it with a multi-meter.
If you live in a concrete house like most houses here are made of. You get a 3 inch galvanized nail either pre drill a hole smaller than the nail or just hammer it into the concrete leaving about 1/2 inch exposed. Connect a wire from the computer or appliance to the nail. a wire zip. tie or small hose clamp will work for securing the wire to the nail. This will work sufficiently enough as a ground. Humming in the audio can also indicate a power supply problem or a loose connection associated with the Audio processor. Algorithm computer repair shop can check it out for you.

 

Does the Philippines use a neutral with phase or use a two phase system.

 

They use a neutral and ground, at least in my neck of the woods. I've seen a few single bushing transformers, but most are 2 bushing transformers with one bushing connected to phase and the other to the neutral and a pole ground.

Shawn

 

The main transmission line is 2 phase with a neutral. the service power is single phase. Transformers are set up as load sharing on the service line making the spacing between the transformers critical for maintaining correct load voltage.
although you can buy your own private transformer.

 

I have a thought on grounding that is unconventional and probably is against code. If someone has a comment I would like to hear it as there's room for discussion i think.
Consider installing a grounding rod near the service panel and ground the neutral. Wherever a device requires the 3RD pin, install an outlet and connect the ground pin to the neural.
My thinking is the ground pin is mostly a path to earth and bleeds of stray voltage (induced voltage, leakage currents) etc. My gut feeling is it would work.
If an electrical inspector came along he might have an nervous breakdown.
Has anyone tried this?

 

When I wrote earlier about using a 3 inch nail to create a ground next to the power outlet. Maybe I should have added that this new ground can be tested by using a volt meter between the nail and the power side of the wall outlet you should get the same reading as you do when connected to both sides of the wall outlet. The concrete posts are better than the hollow block wall between them But I have used both with success.

 

I like your idea as it will bleed off stray voltages. I just don't want to put nails in my wall.
At my place the earth to neutral voltage is typically 2.5 - 3.5 volts.
I have no idea what the current flow to earth would be (circuit impedance unknown), someone blew the fuses on my multimeter.

 

Yes that would work as long as you can determine at the outlet which wire of the two is the neutral. The house I am renting has both wires are the same color. The entire house is wired with the same color wires. Some of the light switches even have the switch on the neutral versus the load. That problem is obvious at night when you turn off the light and bulb is a Compact Florescent it will still have a faint glow. This problem increases your electric bill.