Electrical codes or the NFPA70 and the standers for electrical work and are in place to protected the public from bad wiring that can cause fire's and other hazards
Major fire incidents have resulted in stricter electrical and building codes. For example, it used to be that fire detectors were not required, but they are required in many areas now. There are also stricter requirements on some building materials that have to be flame retardant, and stricter electrical codes.
Follow national and international standards and codes.
That question can only be answered by someone who is familiar with local building codes. Contact a local electrical contractor for information regarding local building codes.
It is different in different states. You are dealing with 2 separate codes here. HVAC & Electric codes. Contact both your electrical inspector and whoever inspects gas HVAC for a definite answer.
The County Inspection Office can help you with any question about Electrical code questions. Can possibly provide you with a copy of there local requirements..
nec is published every 3 years 2011,2008 and so on
As with any electrical codes throughout the world it is a document for the safe installation and handling of electrical wiring. The set of instruction on how to install equipment is different in many parts of the world due to the different voltages and climatic conditions in which the wiring is installed. The top concern of any code rule is for the safety of the people who use electricity.
Electrical basics Get a job with someone knowledgeable, as a helper, for about five years, attend electrical classes at night, read every technical manual you can secure and learn the various electrical codes. That should provide a rudimentary understanding of what is required.
Could be electrical or a bad computer. May not be a "do it yourselfer" job.
Red, Yellow and Blue for Live. Black for neutral and Green for Earthing
NEC Book each state uses different year codes
Architects work with fire protection engineers to design buildings and building systems that are safe and conform to the appropriate building codes, fire codes, electrical codes, mechanical codes and life safety codes, among others. It is then up to the contractor to build it correctly and the owners to maintain it correctly.