national electric code การใช้

• The National Electric Code states that a safety / service disconnect must be installed within sight of serviceable equipment.
• It is very often assumed that these colors are dictated by the National Electric Code ( NEC ), however they are not.
• Although not permitted under the US National Electric Code, it is technically possible to have a  plug and play PV microinverter.
• While article 690 of the National Electric Code provides general guidelines for the installation of photovoltaic systems, these guidelines may be superseded by local laws and regulations.
• Parts of the code reference other codes including the International Plumbing Code, the International Mechanical Code, the National Electric Code, and various National Fire Protection Association standards.
• If the wall is made of a noncombustible material, drywall, plaster or concrete, then the outlet can be 1 / 4 inch back from the surface, according to the National Electric code; for other wall materials, it must be flush.
• Upon sensing power loss, the ballasts switch into emergency mode turning the existing lighting into emergency lighting in order to meet both the NFPA's Life Safety Code and the national Electric Code without the need of wiring separate circuits or external wall mounts.
• The government has laws that you can't fix your sidewalk, put up a patio cover, install your own sprinkler system, put a storage building in your backyard, do wiring covered by the National Electric Code, whatever that is, or even put in a heliport without a government permit ."