Ground Pole

[mikyss]

This has probably been addressed before.
However my Search skills did not show up...

I´m getting electrical shocks when touching the chasis or the interconnect cabling. Not sure.

I will check on my electrical outlets for any reverse pole.

However I found out that Emo gear does not have Gnd input poles. How come ?
Aren´t the chasis supposed to be grounded ?


Help...

Thanks,

[geebo]

Nov 1, 2016 13:18:34 GMT -5 mikyss said:

This has probably been addressed before.
However my Search skills did not show up...

I´m getting electrical shocks when touching the chasis or the interconnect cabling. Not sure.

I will check on my electrical outlets for any reverse pole.

However I found out that Emo gear does not have Gnd input poles. How come ?
Aren´t the chasis supposed to be grounded ?


Help...

Thanks,

Is it static electricity? Or are you getting 120v shocks?

[vneal]

Wow. Not good. Carpet, dry , winter time sure it is not static electricity?

[Lonnie]

The majority of our gear is double insulated and therefore does not require or use an earth ground to be inherently safe.

Earth grounds are a double edge sward. The can either help prevent ground loops or cause them. So for us we prefer to avoid that potential issue all together.

Lonnie

[405x5]

Sure sounds like a ground issue in the house wiring for that room at least.
Sometimes an outlet goes ungrounded.
Used to be harder to miss with the metal boxes.

[ÈlTwo]

Nov 1, 2016 16:26:29 GMT -5 vneal said:

Wow. Not good. Carpet, dry , winter time sure it is not static electricity?

Actually, the OP is in Brazil, and it should be more like Spring there, and probably a bit more moist.

[leonski]

SOUNDS like a Hot / Neutral SWAP.

Start with an OUTLET tester. Brazil uses either 110/60hz like the US or 220. This is generally depending on WHERE in the country you are.
Here in the states, such testers are very inexpensive.

www.homedepot.com/p/Commercial-Electric-Tools-GFCI-Outlet-Tester-Green-MS102H/206029151

I've seen the SAME thing for down around 5$

If the outlet is wired correctly, any plug adaptor MIGHT be wrong or even the wiring internally might be swapped.

ISOLATE the piece in question. Such voltages can come down the shielding of interconnects. If isolation rids you of the problem, see my first sentence.

You also might consider hiring an ELECTRICIAN to help figure out where the fault is.



TWO other things occur, as I think later.

First?    Try another outlet on a different circuit entirely.  
If that works, try another outlet on the SAME circuit.   

I'm making a dangerous assumption which is that your house has a breaker box with multiple circuits distributed thruout the residence.  

Do you have TERRAZO FLOOR?    When I lived in Florida it was like a walking Electric Chair.   I eventually didn't touch ANYTHING Electrical without wearing rubbor soled sneakers.  I got ZAPPED turning off the ancient ZENITH stereo (original 2G tonearm!) and later got blasted across a room when I went to shut off a lamp with one of those PULL CHAINS.

[mikyss]

Thank you everybody.

Lonnie, with the gear being double insulated, and no earth ground, what would be the chasis potential ?
Does double insulation means that by no way the chasis can be at any pole potential ?
Is Neutral attached to the interconnects ? If positive, could be then a hot/neutral swap be the problem ?

Leonski, the room has many outlets close to each other. Not sure if they were wired in separate. Will check.
Floor is wood. But I admit that I laughed a lot with your own experiences...

[leonski]

Nov 10, 2016 10:42:03 GMT -5 mikyss said:

Thank you everybody.

Lonnie, with the gear being double insulated, and no earth ground, what would be the chasis potential ?
Does double insulation means that by no way the chasis can be at any pole potential ?
Is Neutral attached to the interconnects ? If positive, could be then a hot/neutral swap be the problem ?

Leonski, the room has many outlets close to each other. Not sure if they were wired in separate. Will check.
Floor is wood. But I admit that I laughed a lot with your own experiences...

I only smile now. Life in Florida was an 'Electrical Adventure' to be sure. If I lived there? I'd have a WHOLE HOUSE disconnect which
I'd use during ThunderStorms. (Frequent and Violent) while ALSO having Whole House Surge Protection. BIG surges from lightning can 'jump' poles of
mechanical switches, including relays.

Have you DISCONNECTED everything, and started looking for shocks? Do you have a METER? BUY a cheap DVM / DMM (Digital Volt Meter/Digital MultiMeter) and check from a ground point to Neutral on your power. Use the AC scale. If you get a reading AROUN 115v+-10v, you've got a problem.
Do you have a OUTLET TESTER? Get one of those, too. Cheap enough that they should be in EVERYBODY's kit.

Unplug your stereo. Plug in a LAMP. Turn lamp ON. Flip ONE breaker off at a time until it goes OFF. Try plugging into OTHER outlets It is likely your outlets are 'daisly chained' thru out the house. In the STATES, and by CODE, some outlets are required to be GFI. This is Ground Fault Interupt and will kill the circuit is such fault is detected. Do you have such an outlet anywhere?

You can buy a GFI extension cord.   That MIGHT be another avenue of investigation.  

Time to quit thinking and start DOING.     If you have ANY problems with what I wrote, ask back and than go find an Electrician to do the tests.   Does your house have a Ground Rod driven into the earth near the Elecctrical Box?   That's ALSO code up here in the states.