[ddots-l] Re: getting shocked by equipment in home studio, any suggestions?

  • From: "Nick Dotson" <nickdotson@xxxxxxxxxxxxx>
  • To: <ddots-l@xxxxxxxxxxxxx>
  • Date: Sat, 19 Sep 2009 17:52:06 -0500

I don't trust the power from small venues like bars that expect the band to plug into the Juke Box outlet, or the outlet the coolers are plugged into. I don't trust the dirty brown power of venues like hotels. In essence, I don't trust the power at any venue to be properly wired, or to be any good for my equipment whatsoever... It's always nice if you have a member in a road crew with enough of an Electrician's background to just go snag you a feed from the nearest power pole for the night, but I've never been in a band flush enough to have such a useful thing as a road crew, much less one who's an electrician... (sad expression)


Nick


----- Original Message ----- From: "Cameron" <cameron@xxxxxxxxxxxxxxxxx>
To: <ddots-l@xxxxxxxxxxxxx>
Sent: Saturday, September 19, 2009 4:34 PM
Subject: [ddots-l] Re: getting shocked by equipment in home studio, any suggestions?


Hi.  ah, yes, that would be good to have.

Cameron.





-----Original Message-----
From: ddots-l-bounce@xxxxxxxxxxxxx [mailto:ddots-l-bounce@xxxxxxxxxxxxx] On
Behalf Of Nick Dotson
Sent: Saturday, September 19, 2009 10:44 AM
To: ddots-l@xxxxxxxxxxxxx
Subject: [ddots-l] Re: getting shocked by equipment in home studio, any
suggestions?

Also, Richard Oehm makes a talking output tester VOM Meter combination for
around $100, which I intend to buy.  I don't honestly remember whether it
does 110 and 220 V.AC, but if so, that would be handy in venues where you're

taking a 220 line and running it through a power conditioner that steps it
down for the 110 equipment, and generally gives you at least the equivalent of 2 30 amp circuits, and often I've found those 220 lines stepped down are
less noisy than the 110 lines in venues with everything from beverage
coolers to light dimmers kicking up noise.

Nick


----- Original Message ----- From: <albertm13@xxxxxxxx>
To: <ddots-l@xxxxxxxxxxxxx>
Sent: Saturday, September 19, 2009 8:57 AM
Subject: [ddots-l] Re: getting shocked by equipment in home studio, any
suggestions?


Hi,

If you have three pronged outlets you could possibly start by going to a
hardware store and buying an outlet tester.  Sorry, I couldn't find one at
homedepot.com.  You can read about them at
en.wikipedia.org/wiki/Receptacle_tester and
www.acmehowto.com/howto/homemaintenance/electrical/outlettest.php
Make sure you get one that can be plugged into the outlet and not just put
near the outlet. You would need sighted help because they only have lights.

They are not expenssive.

If you have two pronged outlets then it's probably a bad piece of equipment
on your end but turning the plugs around might help.  I don't know of an
easy way for you to test for the problem without a voltmeter.

If the problem isn't your house wiring then you need someone who could
figure out what piece of your equipment is causing this problem. Old pieces

of equipment like a tube amps are notorious for causing this problem.

Whenever you get shocked, electricity flows through you which means it has
to go in one part of you and out another.  Birds on power lines don't get
killed because they are only touching one thing. You are touching your mics

but you must be touching something else too.  That's why someone else
recommended a rubber mat. Using a rubber mat is only hiding the problem but

the problem is still there.  Are you wearing shoes?  Perhaps your desk is
metal and it is touching something.

Albert

--- Cameron wrote ---
Hi all. I have a problem, hopefully someone can give me some suggestions or

shed some light on why this is happening.

The apartment complex I'm living in now was built in the early sixties I
believe.  The outlets are not very good, worn out, you can't plug anything
into the top of any of them because it just falls out.  You can only plug
things into the bottom plug.

Anyways, when I was using my FW1884, I didn't notice any issues with
anything except for noise because I am on a dirty circuit/loop being shared
by all sorts of appliances and god knows what else.

My current setup is now my ADK rack mount machine, Motu896 MKIII firewire
interface, and BCF2000 control surface, which is all plugged into a power
conditioner.

I started doing some tracking with my new gear for a new job this week and
whenever I used a mic that required phantom power, as soon as the mic was
plugged into the interface, I would get shocked if I touched anything metal
that was plugged into the conditioner, including the mic itself computer,
control surface, interface, etc, . It's not enough to cause damage, but it
is unplesent and is enough of a jolt to make you quickly stop touching
whatever control you're touching.

This happens even when the phantom power is switched off for every channel
on the interface.  I found out this afternoon that it also happens with
dynamic mics too.

As soon as all mics are unplugged, everything is fine.

My power conditioner doesn't appear to have a ground lift switch.  Is this
the issue? Is there anything I can do to remedy this? I've got 5 months of

writing and recording ahead and I really don't want to be freaking shocked
every time I touch my gear!

I'm going to make this issue known to the apartment manager on Monday but I really doubt they will understand what I'm talking about, or give a damn for

that matter.

Any thoughts would be greatly appreciated!

Thanks,
Cameron.

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