{Collins} Re: 30S-1 230V wiring



aluminum chassis, but never a SILVER plated aluminum chassis, never not on
the KWM-2 series or other S-line pieces,
mac/mc

---- Original Message -----
From: "Horne David H Civ OO-ALC/YPVS" <David.Horne@xxxxxxxxxxx>
To: <culpepper@xxxxxxxxxxxxx>; <kmarshall1@xxxxxxxxxxxxxx>;
<scottjohnson1@xxxxxxx>; "Collins Reflector Posting" <collins@xxxxxxxxxxxxx>
Sent: Thursday, July 08, 2004 12:02 PM
Subject: {Collins} Re: 30S-1 230V wiring


> Every comment made about the advantages of a safety ground makes good
sense,
> however there are some reasons that are appropriate for the radio
> communication's sake.  All the radio equipment should be connected to a
good
> earth ground.  In Desert Shield in about 1991 an Air Force communications
> operator with whom I was able to speak said that over in the desert sand
> their new, fancy, very expensive HF radios did not work well, because they
> could not sink a ground into solid earth.  They said, however, that
somebody
> was able to scrounge up a KWM2-A which worked better.  So they outfitted
as
> many comm locations with a KWM2-A as possible.  I would attribute that in
> part to the excellent corrosion resistant cabinet ground (silver plated
> chassis) Collins designed into his rigs.  A good earth ground also will
> reduce background static noise, that raises the audio dB level, thus
> requiring greater signal amplitude for the human ear to discern the sound.
> Furthermore some antennas work better if the ground is actually connected
to
> an earth ground.
>
> David H. Horne/WA7LJU
>
> -----Original Message-----
> From: collins-bounce@xxxxxxxxxxxxxxxxxxxxx
> [mailto:collins-bounce@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of William
Culpepper
> Sent: Thursday, July 08, 2004 9:09 AM
> To: kmarshall1@xxxxxxxxxxxxxx; scottjohnson1@xxxxxxx; Collins Reflector
> Posting
> Subject: {Collins} Re: 30S-1 230V wiring
>
> At the risk of beating a dead horse, I will add a short note because of
the
> serious safety issue related to the National Electrical Code.  I stand by
my
> original statements regarding the 30S-1 that it does not meet the current
> code unless it has a four wire cable with a non-current carrying safety
> ground wire connected to the "ground" (not neutral) in the panel.
>
> As politely pointed out by several contributors, I was flat out wrong in
> stating that an electric clothes dryer is a 230 volt device.  After
> consultation with an appliance service person and an industrial electrical
> contractor, I have it on good authority that most, if not all, electric
> dryers ARE 115/230 volt devices with 230 volt heating elements and 115
volt
> motors and controls.
>
> New dryers are sold without a power cable.  The owner (or his appliance
> person) selects a 3 wire or 4 wire cable.  If a four wire is chosen, there
> is a provision in the dryer for lifting the neutral from the dryer
cabinet.
> If the 3 wire is chosen (because the house has a 3 prong outlet), the
> neutral is connected to the cabinet, and there is NO safety ground.  New
> dryers have a provision for using a four wire cable where the NEUTRAL is
> lifted from the cabinet by removing a screw or jumper.  The safety ground
> (green) is then connected to the cabinet, and this ground is carried
through
> to the ground in the panel.
>
> Here is the rub.  Just as with the 30S-1, an electric dryer connected with
a
> three prong plug does NOT meet the CURRENT ELECTRICAL CODE.  Millions of
> them are working satisfactorily with 3 wire plugs, but the users are at
risk
> of injury because of a loose neutral or upon the unexpected and unplanned
> fault condition that melts the neutral, possibly placing the cabinet at
115
> volts above ground (or wet basement floor).
>
> I concede that no dryer ever had a winged or round emblem so the subject
is
> a little off topic for this site, but I suspect that some readers get
> involved in house wiring from time-to-time (I do), and since I made a
> misstatement regarding dryers, I wanted to leave no room for error.
>
> William W4BZ
>
>
> Sponsored by the Collins Collectors Association
http://www.collinsradio.org
> Nets: Tues: 3.805 Mc-2000 Central / Thur: 3.875 Mc-2000 Central
> Fri: 3.895 Mc-2000 Pacific / Sun: 14.263 Mc-2000 UTC
> 1st Wed (of the month) AM Net 3.880 Mc-2000 local (ET, CT, MT, PT)
> Sun AM Net: 29.050 Mc-1200 Central
> Sponsored by the Collins Collectors Association
http://www.collinsradio.org
> Nets: Tues: 3.805 Mc-2000 Central / Thur: 3.875 Mc-2000 Central
> Fri: 3.895 Mc-2000 Pacific / Sun: 14.263 Mc-2000 UTC
> 1st Wed (of the month) AM Net 3.880 Mc-2000 local (ET, CT, MT, PT)
> Sun AM Net: 29.050 Mc-1200 Central
>
>


Sponsored by the Collins Collectors Association http://www.collinsradio.org
Nets: Tues: 3.805 Mc-2000 Central / Thur: 3.875 Mc-2000 Central
Fri: 3.895 Mc-2000 Pacific / Sun: 14.263 Mc-2000 UTC
1st Wed (of the month) AM Net 3.880 Mc-2000 local (ET, CT, MT, PT)
Sun AM Net: 29.050 Mc-1200 Central






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