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Chris Lewis Chris Lewis is offline
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Default Interlock locks to be used in lieu of transfer switch

According to Solar Flaire :
Call it what you like..it won't pass inspection and therefore an
illegal device.


You could get an Electrical Engineer to put his stamp of approval on
the design documents and state it's specific usage...maybe. Apply to
CSA or UL for an approval. You may have to submit a few prototype
samples to get the approval though.


Last I saw (quite a while ago), CSA "type approvals" cost in the
neighborhood of $10K. It may not have gone up now that UL and CSA
are now more-or-less competitors in the same markets because of NAFTA.

[NAFTA meant that UL is more-or-less accepted in place of CSA in Canada,
and vice-versa in the US (where the standards are equivalent).]

In Ontario, it used to be that you could get a "Hydro Inspector" (power
utility) in to do a "unit approval" for $75. Which would stand in place
of CSA approval for a single device. Subsequent copies had to be inspected
independently. Intended for very low volume items. Ontario's power
regulations have changed drastically and with the breakup the inspection
agency is "ESA", and that is probably not available anymore.

If such a thing were available in the US, that's probably Igor's
least expensive option.

CSA also lists certain engineering testing companies as approvers
in place of CSA. NEC probably does as well. Eg: Warnock Hersey.
But that's also largely intended for production runs, and it's
not cheap.
--
Chris Lewis,

Age and Treachery will Triumph over Youth and Skill
It's not just anyone who gets a Starship Cruiser class named after them.