Dedicated Electrical Space NEC 110.26

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Michele

Member
Location
Massachusetts
Occupation
Electrical Designer
Good morning. This may be a simple question for most members but I am unsure of the following.
NEC 110.26 indicates a dedicated electrical space above a distribution panel is 6 feet.
I do not know the facts for this determination but I believe this is to allow conduit entry and to keep mechanical/piping out of the electrical space.
The concern I have is the contractor is building supports 3 feet above the distribution panel to mount the transformer.
Is this in accordance with code, as the transformer is "electrical"?
Thank you for your feedback.
 

Michele

Member
Location
Massachusetts
Occupation
Electrical Designer
Thank you Dennis. Since posting the thread, I have been searching through our site photos and photos online to determine if there are similar installations. It appears the transformer is not that popular as a subject to capture the installs. Most are floor mounted but we are short on space and the contractor chose to go overhead.
Thank you again for your feedback.
 

dkidd

Senior Member
Location
here
Occupation
PE
Good morning. This may be a simple question for most members but I am unsure of the following.
NEC 110.26 indicates a dedicated electrical space above a distribution panel is 6 feet.
I do not know the facts for this determination but I believe this is to allow conduit entry and to keep mechanical/piping out of the electrical space.
The concern I have is the contractor is building supports 3 feet above the distribution panel to mount the transformer.
Is this in accordance with code, as the transformer is "electrical"?
Thank you for your feedback.
I don't like it, but I have seen it done and believe that it is Code compliant.
 

don_resqcapt19

Moderator
Staff member
Location
Illinois
Occupation
retired electrician
It really depends on your AHJs interpretation of "shall be dedicated to the electrical installation". My view of this would really depend on the number of circuits that the distribution system could supply vs the number that are being supplied at the original installation. If the installation of the transformer will not prevent the future installation of the number of cables or conduits that would fully utilize the distribution panel capacity, I would approve it. If the transformer would make that difficult or prevent that, I would see it as a violaiton.
 

Michele

Member
Location
Massachusetts
Occupation
Electrical Designer
Thank you all very much. As mentioned, there will be space for future circuits in the panel so access to the panel top should remain available. I will comment to the design drawings indicating as such. Thank you all for your assistance.
 
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