I think the approval sticking point on these interlock kits was that they
are defeated if you remove the front panel of the box.
Doug
On Thu, Aug 16, 2012 at 7:56 AM, Ian McFetridge
<shop-talk2@mcfetridge.org>wrote:
> Make sure to investigate the Interlockkit with your local inspector if you
> will be pulling a permit or otherwise having an inspecting checking your
> installation. I installed one ealier this year and went through a bit of
> hassle passing my final inspection. Email from earlier this year:
>
> Just to close this saga out...we passed the re-inspection.
>
> I showed the inspector the cut sheet for the interlock (downloaded from
> http://www.interlockkit.com/) and the OSHA ruling.
>
> http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=FEDERAL_REGISTER&p_id=22157
>
> The inspector accepted my interpretation that the part is still certified.
> Wyle was certified when the part was tested in 2009 and according to the
> OSHA site "the Agency no longer accepts product certifications made by Wyle
> on or after this effective date." (24-Aug-2011), so the part still holds a
> valid UL listing.
>
> If they make an interlock kit for a new panel, then they will need to use a
> currently certified testing lab to get the UL listing for it.
>
> To me and others it is a matter of common sense that mechanical interlock
> either works or does not work, but it's obviously possible for inspectors
> to stick to the letter of the code.
>
> - Ian
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