NEMA - National Electrical Manufacturers Association
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NEMA C136.27-2012
Scope
This standard covers luminaires used for illuminating roadway tunnels and underpasses. The requirements in this standard are limited to general attributes of tunnel luminaires due to the wide variety of designs possible.
NEMA C136.27-2012 history
2012NEMA C136.27-2012 For Roadway and Area Lighting Equipment— Tunnel and Underpass Lighting Luminaires
2005NEMA C136.27-2005 For Roadway and Area Lighting Equipment Tunnel and Underpass Lighting Luminaires