In what jurisdictions/instances is the International Building Code enforced? It appears the IBC is more stringent than NFPA codes that I have come across, at least for electrical requirements.
Well in the US there are fifty states.
Some States adopt a code state wide.
Some states allow each city to adopt whatever code they want.
But the IBC references/ uses some NFPA standards.
The vast majority of States and Territories adopt the ICC codes. The ICC codes reference multiple NFPA Standards, and in many cases the documents share Technical Committee Members. The ICC IFGC and NFPA 54 are basically 99.9999% identical.
The answer that matters will come from your local AHJ (Authority Having Jurisdiction). Check your city's website or call the local Building Department or Fire Marshal and ask what Code they reference.
What is systematically confusing is the name of the code " International Building Code". International codes are documents issued by organizations at UN (United Nations) or similar level with worldwide elaboration and adoption.
ICC is purely a US code. If the name would change to National Building Code similar to NFPA and NEC there would be a focus on harmonization.
They think they sell more copies by naming it "International Building Code." I have the same problem with NFPA-70 putting the measurements in metric FIRST and then standard SECOND. They think it will appeal to a wider audience than just US, and therefore sell more copies.
Incidentally, many other standards, including the "INTERNATIONAL Building Code" list US measurements FIRST and metric SECOND. It's just so damn confusing that I constantly have to read past the first number, where the NEC is concerned. NFPA doesn't want to hear it. They so love customer feedback, until you give it and it doesn't align with their "vision" for the document. I can still remember that day I was in a rush, behind in inspections, accidentally read the code too quickly and cited the wrong measurement.
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