[vcf-midatlantic] Off topic-testing 3 phase power

Ben Greenfield ben at cogs.com
Mon Jul 10 14:01:01 EDT 2017

Hey Herb,

The only thing I can say in my defense is that one can be both naive and have respect for electricity.
As for a professional, I have one involved. Unfortunately my natural curiorsity keeps me from being passive during integration of this project.

I could have gotten into all sorts of esoteric details about what I’m really trying to troubleshoot but I really wanted a simple answer, which I got from Bill Dudley. Bill’s answer was simple and re-enforced my beliefs on the subject.

Regarding testing equipment. I believe the Fluke I referenced was proper testing equipment and I wanted to see what others thought. I included a link to it’s page it is rugged 4 channel 100 Mhz portable oscilloscope. This looks like the ultimate tool for this type of work and I wanted to know what other’s thought.


I followed list guidelines by marking the post off-topic. I felt it was a fair question in a hacker environment and I thought others may have first hand experience they could share.

I was satisfied with answers I did receive and I love that the list exists as resource for hacking questions for all sorts of technology.



> On Jul 10, 2017, at 12:45 PM, Herb Johnson via vcf-midatlantic <vcf-midatlantic at lists.vintagecomputerfederation.org> wrote:
> Ben Greenfield has asked about testing a 50Hz 400 volt 16 amp outlet.
> Without going on about it: something in Ben's request, doesn't feel "right". This is a dangerous circuit. I don't give public advice about things that put people at risk.
> Ben, consult with a local qualified electrician, about whatever you have in mind. If such circuits are unfamiliar to you, if you don't have appropriate LINE TESTING test equipment -  get someone who IS familiar and local and qualified.
> Herb Johnson
> -- 
> Herbert R. Johnson, New Jersey in the USA
> http://www.retrotechnology.com OR .net

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