NEC (NFPA 70)

Most multifamily projects include a central service point consisting of a modular metering service with SE cable distributing to each apartment where it terminates on a main log only pain. Most engineering drawings do not indicate the route between the service and the load center. There appears to

We have a project where the service lateral extends underground from an exterior underground utility maintenance hole to at CT cabinet section of switchgear in the parking area (lowest floor). The service lateral conductors are (4) Sets of 500 KCMIL Copper (1520 amps). These conductors terminate

What does the NEC say about sizing the neutral conductor for harmonic loads? Are there other technical specifications that should be apply by way of standard for small commercial applications?