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That is a very interesting take.  As long as one of the dimensions is at least 12-foot I have been requiring the floor box.   The wall receptacles are required for 1000 sq. foot and lower, as you know.

1. Steel pipes cannot be used underground. The only exception are ASTM A312 stainless steel pipes. 2. Pretty much all commercially available ductile iron pipes are cement lined. 3. Even with wrapping steel pipes are not permitted underground. 4. No. 5. NFPA 13 section 6.4.2.1 has requirements for protection against freezing.

The requirements like in Section 8.3.4.2 Firestop Systems and Devices Required of the 2018 NFPA 101 are performance specification as most of the code is not prescriptive.  The code does not preclude the use of 'fire collars' for specific sizes of pipe. In accordance with Section 8.3.4.2.1, penetration for pipes of any size that pass through a…

Thank you sir............that's the ticket!

You may want to refer to FM Data Sheet - 8-1 Commodity Classification, Specifically paragraphs 2.3.5, 2.3.7, 2.3.8, 3.8.3 & Figure 3.  Comments from that DS - The external packaging of the a material will determine the early stages of fire growth.  If the external packaging is higher or lower hazard than the material inside the package, the…

You would have to ask code panel 17 and they may not have an immediate answer for you.   But your interpretation wouldn't necessarily be incorrect - equipment that comes with lugs from the factory would be "listed for use."  It is just if you install something in the field, then it has to be listed for direct-burial use.   Here is how they…

Sounds like you are making your own motor control panel. I'd look for the mark (for the enclosure as a whole) and not just that there is a listed disconnect incorporated therein...

Although these types of elaborate systems may not be specifically mandated, when provided, they must meet all applicable provisions of building safety codes such as NFPA 101. No one has mentioned the life safety features of  means of egress that may be dependent on the alternate source of power. Something must be done with more immediateness than…

Generac, Kolher, and Briggs have all performed enclosure testing with SwRI.  SwRI has an online certification directory, and by selecting "Fire-rated Engine Generator Assemblies" you can view the listing information.  The testing that SwRI performs is for reducing the 5 foot separation from the generator to a combustible wall of a structure.   

Any outlet under a sink - check with your AHJ if it has to be GFCI as this will vary from jurisdiction to jursdiction. I require it under 2017 210.8(A)(7) and on commercial 2017 210.8(B)(5).   Dishwasher has to be GFCI under 2017 210.8(D), even if hard-wired. 210.8(D) Kitchen Dishwasher Branch Circuit.  Yes, AFCI applies also because it is…

I have seen too many local inspectors' opinions for an equivalency not support a legal case by the administrative hearings or courts.The administrative policies and regulations of the AHJ, not the individual inspector's opinion, must have legally adopted procedures for an equivalency. Our office uses a variance request rules and regulations where…