[dsg-eic_dirc] exit sign inside the dark room

[Beni Zihlmann]

Hi,

according to  Maintenance, safeguards, and operational features for exit 
routes:
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.37

there is nothing that would prevent a mechanism where the Exit sign 
light power is controlled by a relay that detects power
or the loss of it as far as I read it.
However, a "curtain" for example is explicitly not allowed! see: 
1910.37(b)(3)

cheers,
Beni




On 9/19/23 11:17, Imani Burton wrote:
> Hi Beni,
>
>
> That is correct the "EXIT" light is in the dark room for safety 
> reasons. Due to OSHA regulations, exit signs are constantly 
> illuminated so even if there is power the exit sign light is on.
>
>
> Thank you,
>
> Imani
> ------------------------------------------------------------------------
> *From:* dsg-eic_dirc <dsg-eic_dirc-bounces at jlab.org> on behalf of Beni 
> Zihlmann via dsg-eic_dirc <dsg-eic_dirc at jlab.org>
> *Sent:* Tuesday, September 19, 2023 10:37 AM
> *To:* dsg-eic_dirc at jlab.org <dsg-eic_dirc at jlab.org>
> *Subject:* [dsg-eic_dirc] exit sign inside the dark room
> Hi All,
> I just want to understand the purpose of the "EXIT" light in the dark 
> room.
> If I understood correctly this sign is there for safety reason in case
> of power loss. This means this light requires
> separate power (ups/battery)? Also, since the purpose of the light is to
> be on when there is power loss, does that
> mean that if there is power the light is not required to be on?
> If that is correct than one can install a relay that switchers on power
> loss and turns on the light. while when there
> is power the light is NOT on.
> is that an acceptable operation mode?
>
> cheers,
> Beni
> _______________________________________________
> dsg-eic_dirc mailing list
> dsg-eic_dirc at jlab.org
> https://mailman.jlab.org/mailman/listinfo/dsg-eic_dirc
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/dsg-eic_dirc/attachments/20230920/92373074/attachment-0001.html>