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alpha86
07-07-2009, 03:17 PM
Hi , I will like to know if any of you guys face the same situation?

I'm from ss19 and I have a few appliances at home such as hifi that gives static when I touch the metal part. I suppose it is not grounding problem as it happens to other appliances too, and they are using 2 pin plug. I got a new macbook and the whole chassis is sort of having a static vibration thing. It got better when I change it to a 3 pin plug.

Could any misconnection at the neutral line caused this phenomenon? And do any of you guys happen to know if our neutral line is connected to tenaga nasional or is it just grounded locally at our home?

Any info will help, thanks.

bslee
07-07-2009, 03:33 PM
Buy a test pen and see if it lights up when the appliance is switched on. If it does, you better seek a qualified electrician to check your main earth system. Many people overlook their mains earth its even snapped, damaged or lost after extensive home renovation works. Every home have a earth chamber at the front of the home. The wire, clamp to the earth rod rots in some years and become ineffective. Get professional assistance on this issue.

VeeJay
07-07-2009, 03:43 PM
You might want to first identify, if its appliances problem (leaking) or its from the power outlet.

If all the appliances that plugged into the outlet have the same phenomenon, then itís the outlet (grounding) problem, if its just one appliance, then the appliance power supply could be the culprit.

ppleong
07-07-2009, 03:57 PM
Aiyah, small problem only. If the test pen lights up, just unplug the 2 pin plug and plug it back "the other way". Believe me, it works. Try it today. No need to call any professionals to check your wiring. It cost a bomb.

tsela
07-07-2009, 04:33 PM
Appliances with two-pin plugs are not grounded and usually need not. Try swapping the positions of the two pins inserted into the wall power socket as suggested by the previous forumer, which will possibly resolve this problem.

Step 1. Switch off the wall power socket.
Step 2. Remove the 2-pin plug from the wall power socket horizontally.
Step 3. Turn the 2-pin plug 180 degree (now the left and right pins have swapped positions).
Step 4. Insert the 2-pin plug into the wall power socket.
Step 5. Switch on the wall power socket.

The tickling/vibration feeling should be gone now, please post to update progress.

alpha86
08-07-2009, 09:58 AM
Thanks guys for yr advice and help. I have tried to switch the 2 pin plug but doesnt seems to work either. The issue is not with the outlet for sure as I experience it at upstairs and downstairs, plus the appliance is new and it happen to a few of them.

I have attached pics after I tested with test pen. I dont supposed this phenomenon is ok. The first is tested on the metallic part (a screw), and I have also found that (second pic) the USB plugged in lights up the pen also.

http://farm3.static.flickr.com/2636/3699199753_4196303627.jpg

http://farm3.static.flickr.com/2572/3699199763_dbcb208012.jpg

Anyone knows of a good certified electrician?

tsela
08-07-2009, 12:04 PM
You got a ďLiveĒ computer. If these pictures were taken when a power adapter with a two-pin plug is used, itís not static but electric, which will give a continuous tingling sensation if touched. Contact the supplier/customer service of your Apple notebook. They will probably replace with a three-pin type power adapter. The third and longer pin is for ground and connects to the earth rod in your home.

It is also a good practice to have home electrical wiring checked. An electrician can mega-test the insulation, check the effectiveness of earthing system and hence the leakage detection/breaker devices. A phone call to TNB should be able to obtain contact numbers of licensed electrical electricians/contractors. TNB numbers should appear in the utility bills.