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Figure 5 – Example of utility tunnel lighting
[Source: Abu Dhabi Utility Corridors Design Manual, b‐1]
Lighting should be designed to maintain a minimum light level of 150 LUX at the walk surface
and be fitted with motion detectors and any necessary overrides for safety purposes.
NOTE – Different countries may have other national standards or regulations.
Figure 6 – Example of utility tunnel fire detection/sprinkler system
[Source: Abu Dhabi Utility Corridors Design Manual, b‐1]
ITU‐T's Technical Reports and Specifications 397
