I have current (amperage) running threw my cold water main the more load you put on the higher the amperage would this cause the leaks?
This would result in electrolysis and corrode the donor (copper) rapidly. If you have cuts or exposed tissue on your fingernails it will hurt a lot in the shower. Bad ground someplace, normally it is the phone or some DC source in the house. maybe AC thermostat on the 12-24 dc side.
Get a utility Knife, some Garden hose and a hose clamp. a hose clamp can be gotten at Wal-mart for about $5 usd for a variety of sizes. Ciut the garden hose at about 2 inches with the utility knife and put a slit lenthwise it the hose also. Wrap the hose around the hole (it's better if the water is on for this, that way you know when you've got it.) Then put the correct size of hose clamp around it. Make sure the Hose clamp goes exactly over the pin hole. You can tighten the clamp enough so you can move it arround and get it over the hole. Tighten it down and wipe with a dry towel and look for any leeks. If you have leaks re-adjust the clamp and tighten. Now, pin holes don't usually develop in copper unless there is something wrong. If you dont fix the wrong thing you could have more. It could be a lot of stuff like dirt in the lines, it could be poor instalation like too much flux on or in the pipe.(If this is the case find a way to flush the line with hot water.) It could be bi-metal conductivity. If you have any other metal other than copperor brass touching the copper it will cause a small electric charge to be created and will eventually cause a deterioration of the copper.
I'm curious. How do you know current is flowing through your pipes? Did you check them with a clamp on amperage meter? That's the only way I know of to test for current flow without interrupting the circuit path. Under normal and safe circumstances current should not be flowing through your pluming. If there actually is current flow through your pipes you have something seriously wrong with your wiring and you (or your landlord) should get an electrician to repair the wiring ASAP. As for the pin holes I think it is much more likely that they are caused by corrosion than current flow. Is part of your pluming still iron pipe? (the pipe from the meter to the house maybe?) Remove the faucet screens and check for rusty debris. I read that pin holes in copper pipes can happen when flakes of rusty iron settle on copper pipes. The dissimilar metals react chemically and can corrode enough for pin holes to form. This is why the iron brackets that hold the Statue of Liberty's copper skin together have insulators sandwiched in between the iron and the copper. I suggest you flush your system by opening all the hose bibs and faucets one at a time for at least a few minutes each. Hopefully this will help slow down the formation of new leaks. For repairing the leaks there are books in you local home center that can guide you through the repair process.
