AFAIK the proper depth for an electrical ground rod is 8 feet, in soil with good conductivity and connected with a heavy braid of wire.

Pero check mo muna mga remedyo like the ones above ... or if you have a metal window frame nearby (mounted in a concrete wall) ... something you can easily undo if it doesn't work. It all depends on how much electrical "leak" you have and the ground conductivity - which I've read somewhere should be not more than a measured 25 ohms.

I used an 8' ground rod for my radio transmitter which has a tube-type RF amplifier putting out 1,000 watts of power. The (electrical) bites I used to get on my lips from the micophone was totally eliminated ... and the surge/spike protectors worked as they should, including the lightning protector (as they all need a good ground).

I got the ground rod from a guy working for the local electric company ... meryenda lang ang katapat.