Originally Posted By: jpeck
This post was automatically imported from our archived forum.
Because the AHJ rarely "approves" something using the proper requirements in making their approval.
110.3 Examination, Identification, Installation, and Use of Equipment.
- (A) Examination. In judging equipment, considerations such as the following shall be evaluated:
- - (1) Suitability for installation and use in conformity with the provisions of this Code
- - - FPN: Suitability of equipment use may be identified by a description marked on or provided with a product to identify the suitability of the product for a specific purpose, environment, or application. Suitability of equipment may be evidenced by listing or labeling.
- - (2) Mechanical strength and durability, including, for parts designed to enclose and protect other equipment, the adequacy of the protection thus provided
- - (3) Wire-bending and connection space
- - (4) Electrical insulation
- - (5) Heating effects under normal conditions of use and also under abnormal conditions likely to arise in service
- - (6) Arcing effects
- - (7) Classification by type, size, voltage, current capacity, and specific use
- - (![icon_cool.gif](upload://oPnLkqdJc33Dyf2uA3TQwRkfhwd.gif) Other factors that contribute to the practical safeguarding of persons using or likely to come in contact with the equipment
- (B) Installation and Use. Listed or labeled equipment shall be installed and used in accordance with any instructions included in the listing or labeling.
So, to save they from having to try to make sure that their "approval" is a proper approval [follows 110.3 (A)], simply follow 110.3 (B).
Yes, the AHJ CAN approve things. But they need to do so in a defensible manner. In the manner specified in 110.3 (A).
If I were an AHJ, and I had two products available, I would "approve" the listed and labeled one.
If I were an AHJ and had to "approve" a one-off installation, I would be inclined to have them (whoever was installing the installation) get third party on-site approval and listing. Then I could 'hang my hat' on that third party (i.e., UL, CSA, etc.) approval and listing. But maybe that is just me.