00crashtest
Senior Member
- Location
- California
- Occupation
- electrician trainee
I have the 2017 and 2020 Editions of the National Electric Code. The language is often somewhat vague and is filled with conflicting statements, so I'm extremely confused. As a result, I need some clarification.
In 90.2(A), it says that the scope of the code covers mobile homes, carnivals, and floating buildings. Well, that is understandable because all are normally considered structures (albeit moveable) and not vehicles. However, why does the NEC apply to RVs, when it is normally considered a vehicle and not a building? If they apply it to RVs, why doesn't the NEC to all other vehicles, especially overnight coach buses, Amtrak trains, cruise ships, and wide-body airliners, which all also have sleeping compartments and lavatories? Also, what counts as an RV, because the normal definitions vary so widely and is not defined in Section 100 of the NEC? Also, when an RV is under the jurisdiction of the DMV and not the buildings department, how can an RV ever be required to follow the NEC under any AHJ?
In 90.2(A)(2), it says that it covers yards, lots, parking lots, and industrial substations. Why mention parking lots when it is already included under lots? Also, what do they mean exactly by lots, which is a super vague term? If they mean land lots, then wouldn't all the other mentions in the "covered" section besides floating homes, mobile homes, and RVs be superfluous? Wouldn't it also make the "covered" section conflict with the "not covered" section, beccause no exception was given within either section regarding the overlapped areas of mention (so no hierarchy is estsblished)? Also, what about yards, another very vague term? Front yard, backyard, railyard, bus yard, truck yard, shipyard, aerodrome yard (apron)?
It also does not mention whether it covers onshore wind turbines that are not owned by electric utility companeis, offshore non-floating structures that are not owned or leased by an electric utility company, embassies/consulates of the US located outside of the nation's own territory, and US CBP preclearance facilities located outside of the nation's own territory.
Also, in 90.2(B)(1), why does it classify floating buildings as watercraft and mobile homes as automotive vehicles, when they clearly aren't, having no means of propulsion, hydrodynamic features, or wheels and can't even be registered as a vehicle by the US Coast Guard or DMV?
In 90.2(B)(2), what exactly do they mean by railway? Is it limited to just mainline railways or does it also include non-mainline heavy rail rapid transit, light rail transit, monorails, funiculars, roller coasters, and maglevs (if they do get built here)?
Also, since the NEC is not a legal document per se, does this mean that all of the Code besides the "not covered" section can actually apply to items listed under that section under certain AHJs?
In 90.2(A), it says that the scope of the code covers mobile homes, carnivals, and floating buildings. Well, that is understandable because all are normally considered structures (albeit moveable) and not vehicles. However, why does the NEC apply to RVs, when it is normally considered a vehicle and not a building? If they apply it to RVs, why doesn't the NEC to all other vehicles, especially overnight coach buses, Amtrak trains, cruise ships, and wide-body airliners, which all also have sleeping compartments and lavatories? Also, what counts as an RV, because the normal definitions vary so widely and is not defined in Section 100 of the NEC? Also, when an RV is under the jurisdiction of the DMV and not the buildings department, how can an RV ever be required to follow the NEC under any AHJ?
In 90.2(A)(2), it says that it covers yards, lots, parking lots, and industrial substations. Why mention parking lots when it is already included under lots? Also, what do they mean exactly by lots, which is a super vague term? If they mean land lots, then wouldn't all the other mentions in the "covered" section besides floating homes, mobile homes, and RVs be superfluous? Wouldn't it also make the "covered" section conflict with the "not covered" section, beccause no exception was given within either section regarding the overlapped areas of mention (so no hierarchy is estsblished)? Also, what about yards, another very vague term? Front yard, backyard, railyard, bus yard, truck yard, shipyard, aerodrome yard (apron)?
It also does not mention whether it covers onshore wind turbines that are not owned by electric utility companeis, offshore non-floating structures that are not owned or leased by an electric utility company, embassies/consulates of the US located outside of the nation's own territory, and US CBP preclearance facilities located outside of the nation's own territory.
Also, in 90.2(B)(1), why does it classify floating buildings as watercraft and mobile homes as automotive vehicles, when they clearly aren't, having no means of propulsion, hydrodynamic features, or wheels and can't even be registered as a vehicle by the US Coast Guard or DMV?
In 90.2(B)(2), what exactly do they mean by railway? Is it limited to just mainline railways or does it also include non-mainline heavy rail rapid transit, light rail transit, monorails, funiculars, roller coasters, and maglevs (if they do get built here)?
Also, since the NEC is not a legal document per se, does this mean that all of the Code besides the "not covered" section can actually apply to items listed under that section under certain AHJs?
