[Johnson] AC Circuit Wiring Question

[Bry Carling]

Lots of plastic insulation to keep body parts out of contact with electrical wiring and circuits.

What else do they do I wonder?

Bry AF4K

-- 
Sent from my android "relatively smart" phone. Please excuse my brevity.

_____________________________________________
From: "David C. Hallam" <dhallam at knology.net>
Sent: Mon May 28 15:04:58 EDT 2012
To: Dave Maples <dsmaples at comcast.net>
Cc: Johnson List <johnson at mailman.qth.net>
Subject: Re: [Johnson] AC Circuit Wiring Question


What is done with current appliances, stoves, dryers, etc.? I am sure 
they don't have a step down transformer to operate timers and the like.

What I have, while technically not in compliance with current regs, is 
safe as long as I am sure the neutral is bonded to ground somewhere. 
What bothers me is if I have to operate the rig on 120V and don't have a 
properly grounded neutral. I have operated on 120V a couple of times 
and have checked for ground before plugging it in.

David
KW4DH


On 5/28/2012 1:38 PM, Dave Maples wrote:
> David: If the neutral is bonded to the chassis, then you could have some
> ugliness here. Current code requirements call for neutral and ground to be
> isolated everywhere except back at the service disconnect, where they are
> required to be bonded together.
>
> I would be inclined to put a 4-wire cord on the beast, and a suitable 4-wire
> plug, if you have to operate both 120 VAC and 240 VAC inside the equipment.
> Bond ground firmly to the chassis, and float the neutral inside the
> equipment.
>
> Thanks,
> Dave WB4FUR
>
>
> -----Original Message-----
> From: johnson-bounces at mailman.qth.net
> [mailto:johnson-bounces at mailman.qth.net]On Behalf Of David C. Hallam
> Sent: Monday, May 28, 2012 10:51 AM
> To: Johnson List
> Subject: [Johnson] AC Circuit Wiring Question
>
>
> Not necessarily understanding everything I know, I have a question. My
> Invader 2000 is wired like most other rigs of the 1960's era. The
> neutral of the 240V AC is grounded to the chassis and 120V for the fans,
> etc are taken from one side of the line. I have a 2KVA toroidal medical
> isolation transformer. It can wired for either 1:1 or 2:1. Would the
> use of this transformer eliminate the risk of a hot chassis if anything
> should go wrong?
>
> David
> KW4DH
>
> --
> "Behind closed doors, there is no guarantee that the most basic of
> individual freedoms will be preserved. And as we enter the 21st Century,
> the great fear we have for our democracy is the enveloping culture of
> government secrecy and the corresponding distrust of the government that
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>
> Senators Daniel Patrick Moynihan and Rob Wyden
>
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