High Voltage Safety [RE-wrenches]

[Bill Brooks]

William,

Good list,

I would add,

10. Always wear gloves when working on live circuits.
11. Always wear eye protection when working on live circuits.
12. Hard hats are helpful in any construction project.
13. When on roofs and other structures, use safety harnesses. (Most injuries
and deaths occur from a brief shock that surprises the installer and causes
them to step off the roof--At 600 volts, these shocks are more common).

> -----Original Message-----
> From: William Miller [mailto:wrmiller at slonet.org]
> Sent: Wednesday, May 09, 2001 7:07 PM
> To: RE-wrenches at topica.com
> Subject: High Voltage Safety [RE-wrenches]
>
>
> Friends:
>
> I may have mentioned that I work in the communications industry as well as
> in power systems.  Our broadcast transmitters have power supplies of 15KV
> and higher.  Broadcast engineers usually do not get formal training for
> working in this environment.  They can get training tailored to a
> particular transmitter (a service I have never heard of an inverter
> manufacturer offering).  This training is at their factory and is
> expensive.  This training will include some safety procedures.
>
> There are some common sense precautions one can take.  Don't forget, this
> equipment is limited to 600 VDC by definition.  Here are some tips:
>
> 1. Do not work on high voltage systems alone.  Discuss procedures
> as a team
> before taking action.
> 2. Design the system so there are disconnects where appropriate to allow
> shut off at critical points for maintenance.
> 3. When working on a series module string, consider making final
> connections during non-daylight hours or covering the modules.
> 4. Have a current CPR certificate.
> 5. Double check each connection.
> 6. Install GFI protection.
> 7. Do not use conductive ladders.
> 8. Whenever possible (measuring voltages, tightening a connection), keep
> one hand behind your back (don't laugh, this is an old timers
> rule that has
> saved lives.  You want to keep any fault current out of your chest area).
> 9. Bond all equipment carefully.
>
> This is by no means a complete list.  Anyone care to add?
>
> William Miller
>
>
>
> At 05:54 PM 5/8/01 -0700, you wrote:
> >Bill,
> >
> >Who is going to train us to work on high voltage
> >systems?  Does the CEC have time to conduct workshops
> >on this topic?
> >
> >What kind of things do we need to know about working
> >specifically with high voltage dc?
> >
> >Jerry Caldwell
> >
> >--- Bill Brooks <billbrooks7 at earthlink.net> wrote:
> >
> >> High voltage
> >> systems are a new
> >> ballgame. If you are not trained to work on these
> >> systems, you have no
> >> business doing the work. Don't forget that
> >> electricity is lethal, and we
> >> certainly don't want people getting hurt or worse
> >> because they assumed they
> >> could work on a system because they know "solar".
>
>
> __________________________________________________________________
> William Miller
> SLO Communications: Communications and Power Systems Consulting
> PO Box 50, Santa Margarita, CA 93453
> Voice :805-438-5600		Fax: 805-438-4607	VMail: 805-546-4875
> email: wrmiller at slonet.org
> License No. C-10-773985
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