The world of electrical installations is not always straightforward.
Working on an international project electrical engineers are often bewildered by the extensive amount of electrical standards and wiring regulations which determines their decisions.
The world can be divided in two areas for what concern electrical standards: NEC countries and IEC countries.
IEC 60364 is a collection of documents that define fundamental principles, practices, and performance requirements which reflect the European concept of wiring and distribution systems.
The NEC is a set of specific rules intended to be used for design, installation, and uniform enforcement of electrical system installations based on North American principles and practices.
To be effective, an electrical installation code must be suitable for the existing electrical infrastructure, be suitable for the electrical safety system employed in a country, and be capable of being uniformly interpreted, applied, and enforced. It must