Our club station is having a new electrical service installed courtesy
of the our host. All of the receptacles specified for power
amplifiers are 3 wire, four pole grounding. (NEMA L14-20R)
The licensed professional engineer (PE) is not providing any
receptacles that does not provide a neutral in his design. When asked,
he said he could not endorse an 2 wire, three pole grounding (NEMA
L6-20R) configuration due to liability reasons.
On 4/3/2011 2:09 PM, Bill, W6WRT wrote:
> ORIGINAL MESSAGE:
>
> On Sun, 3 Apr 2011 12:48:25 -0400, "Carl"<km1h@jeremy.mv.com> wrote:
>
>> Yes, today it is not considered "good engineering practice" and its easily
>> remedied with transformers that are wound with 120/240 options by placing
>> the 120V needs across one of the primaries.
> REPLY:
>
> Be careful doing this. Any load placed across only one of the two
> primaries causes unbalance in the voltage and current in each primary.
> The heavier the load, the more the unbaalance.
>
> Investigate carefully before finalizing the design.
>
> 73, Bill W6WRT
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