[ICOM] PW-1 220 VAC US wiring?

[Bill Gode, Sr.]

Googling "4-wire 240 vac" produced many answers and one of the better from:

http://www.nojolt.com/Understanding_240_volt_circuits.shtml

which says, in part:

"I previously mentioned "straight" 240 volt appliances, but there is another 
class of 240 volt equipment; some appliances (such as clothes dryers and ranges) 
use 240 volt current to power their main function (drying clothes or cooking 
food) but use 120 volt current to power accessories such as the clock on your 
stove or the light inside the oven, or the digital readout on your dryer 
controls. That is why some 240 volt circuits have four wires:

1) A black wire which is often known as the "hot" wire, which carries the 
current in to the fixture.
2) Another "hot" wire which is red, which also carries current in to the 
fixture.
3) A white wire called the neutral which completes the electrical circuit for 
the 120 volt accessories only.
4) A bare copper wire called the ground, the sole function of which is to 
enhance user safety.

At one time, the code allowed for one insulated wire to function as both ground 
and neutral in 120 / 240 volt combo circuits, but now all such circuits must use 
the 4 wire scheme. This is why your new dryer (or electric range) might have 4 
prongs on its plug and your old dryer receptacle only has 3 holes. In which case 
article 250.140 of the 2005 N.E.C. (National Electric Code) allows for the 
"pigtail" (the cord and plug assembly) to be changed to match the old 3 wire 
receptacle as long as certain conditions are met. The National Electric Code 
allows that, but your local code might not, so check first, or even better yet 
make a deal with the appliance dealer to do it for you. "

73,

Bill, W9NHQ


----- Original Message ----- 
From: "Kent Hufford" <khufford at atlanticbb.net>
To: "'ICOM Reflector'" <icom at mailman.qth.net>
Sent: Sunday, July 20, 2008 2:42 PM
Subject: [ICOM] PW-1 220 VAC US wiring?


> Thank you Adam.
>
> I guess I am not making myself very clear.
>
> My Dryer HAD a 3-wire plug on it. I moved, and the new house has a 4-wire
> socket. So, I had to rewire the Dryer with a 4-wire plug. The instructions
> were in the Dryer owners manual.
>
> My PW-1 HAS a 3-wire plug on it, that was used in VA on 200-240vac.
>
> The instructions on p. 5 of the PW-1 user manual is fine for "3-wire"
> connections. If I have to plug it into a 4-wire socket, how do I do that?
>
> And I don't want to connect it to 120vac, and only get 500 watts out.
>
> If an electric dryer manual can tell me how to hook it to 4-wire, then ICOM
> or this forum should be able to tell me about my PW-1 too<g>.
>
> Thanks
> Kent
>
> -----Original Message-----
> From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net] On
> Behalf Of Adam Farson
> Sent: Sunday, July 20, 2008 3:17 PM
> To: 'ICOM Reflector'
> Subject: RE: [ICOM] RE: PW-1 220 VAC US wiring?
> Importance: High
>
>
> The instructions for connecting the IC-PW1 to various mains supplies are on
> p. 5 of the user manual.
>
> The IC-PW1 does not require a 120V supply hen connected to 220V mains.
>
> Cheers for now, 73,
> Adam VA7OJ/AB4OJ
>
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