Author Topic: Tingling Chargers  (Read 1123 times)

Offline Taman Tun

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Tingling Chargers
« on: April 04, 2019, 10:31:25 PM »
If I am charging a phone or laptop or battery pack I often get a tingling sensation if I touch the device.  This is due to lack of isolation between the mains and the DC output from the charger.  This is a bit of a worry as you are only a small component failure away from having a direct connection to the mains.  The chargers often boast certification to EU, Underwriters Labs, FCC etc but this is no guarantee of complete isolation. 

I have a HP laptop and the charger is covered with a whole swarm of alleged certification approvals.  The charger works fine and there is no tingle provided you connect to a 3 pin socket with earth.  However if you use a 2 pin socket, which is often the case, then I get tingle when touching the laptop.

My worst device is a Yukuma charger and battery pack.  This allegedly has CE and FCC approval but the tingle is very bad indeed. Do not buy one of these.

The only charger which receives the Taman Tun Tingle Seal of Approval is the 2 pin Apple charger.  It is completely tingle free.


If the old only could, if the young only knew.

Offline KiwiCanadian

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Re: Tingling Chargers
« Reply #1 on: April 05, 2019, 06:26:02 PM »
More than likely faulty wiring in the house not properly earthed. Do you get the tingly's from all receptacle's in the house or just a few?
If its the whole hose then the phase & neutral are probably swapped, need a good lectirtian to sort that out, if its just a few the the outlets will have to have the line & neutral swapped.

Also check your earth connections and ground rod, make sure the ground rod is wet, at least damp, with all this dry weather without water the ground rod is not doing its job.

I am no expert but have seen this a few times.

May be some one with more experience would have a better Idea of what the problem is.

Offline Taman Tun

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Re: Tingling Chargers
« Reply #2 on: April 06, 2019, 06:42:02 AM »
KC, I think the problem lies in the design of the chargers. Most of them are 2 pin devices and phase- neutral polarity should not matter if they are providing true isolation between input and output.  The HP charger (3 pin device) is fine when used with an earth connection but you get tingles if you use it in 2 pin mode.  This just shows that there is no true isolation between input and output.  The only way to achieve true isolation is to have a transformer between input and output, but I think a lot of these devices are based on switch mode power supplies with no true isolation.  Unfortunately, most of these chargers are sold in bubble packs so you cannot do a tingle test in the shop.  All I can say is steer well clear of of the Yukuma.
If the old only could, if the young only knew.

 



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