[Scan-DC] Topic drift on RF interference

[Blair Thompson]

---------- Original Message ----------
From: "Blair Thompson" <b_thom at juno.com>
To: SDAITCH at bbg.gov,  Scan-DC at mailman.qth.net
Subject: Re: [Scan-DC] Topic drift on RF interference
Date: Mon, 13 May 2013 14:41:43 GMT

I believe you used to be in Kuwait. I'm guessing this is a VOA antenna assembly. For workers in the U.S. there's an OSHA standard that covers that situation. I Googled and came up with this:

Radiofrequency Energy Poses Unseen Hazard
http://ehstoday.com/safety/electrical/ehs_imp_36029
[snip]

Here's something from 2012:

Crane and Lift Operators – Beware RF Shock and Burn!
http://www.lbagroup.com/blog/crane-and-lift-operators-beware-rf-shock-and-burn/

"The OSHA Health Response Team measured currents as high as 200 milliamps (mA). The American National Standards Institute C95 committee is considering a limit for this type of grasping current hazard of 100 mA. Measurements also indicated that electric field strengths in the general vicinity of the ship were on the order of 10 volts per meter. However, this is well within the ANSI C95.1 – 1982, Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 300 kHz to 100 GHz, limit of 632 volts per meter for AM radiofrequencies. Because of this induced current and an open circuit voltage from cable end to ground measured at approximately 300 volts by the Health Response Team, spark discharges occur just before and after grasping the cable. These discharges have resulted in burns."
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