NEC110.26(A)(1) and 770

[Isaiah]

Are there any min front access working clearances required for a cabinet that is purely fiber optic?


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[charlie b]

Does it have energized metal parts that could accidentally be touched by someone working on the fiber?

 

[Isaiah]

Does it have energized metal parts that could accidentally be touched by someone working on the fiber?

No sir -


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[charlie b]

Working clearance is required for components that are likely to need maintenance while energized. It seems to me that your fiber optic cabinet does not fit that criterion.

 

[Isaiah]

Working clearance is required for components that are likely to need maintenance while energized. It seems to me that your fiber optic cabinet does not fit that criterion.

Agreed - would minimum general access apply?
Such as 30”deep and 30” wide—
Or zero minimum?


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[cabledawg]

Generally just enough room to open the door and slide out the fiber tray for future fibers and/or troubleshooting. Have a good weekend!

 

[Carultch]

Agreed - would minimum general access apply?
Such as 30”deep and 30” wide—
Or zero minimum?


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I'd see this as a non-electrically energized serviceable item, and therefore recommend the 30"x30" minimum.

 

[don_resqcapt19]

The issue is that the first row of requirements in Table 110.26(A)(1) starts at ZERO...that would seem to include fiber that has no voltage on it

 

[ruxton.stanislaw]

Keep in mind that fiber in longer range installations must be respected. The light energy some transfer are capable of instantly blinding, burning, starting fires etc.