The list of rules to be followed when installing new electrical systems into a building are related to the specific rules of the state, as well as certain minimum requirements laid down by Federal law. So in some senses the United States does not have a unified Electrical Building Code, because often there are variations between different states.

It was to address exactly this issue that the National Fire Protection Association, a panel of nineteen different bodies, began publishing the National Electrical Code (NEC) in 1897, and now every three years, in order to arrive at a single source of rules that should govern electrical installations. The current version was published in August 2010 and runs to over 1000 pages.

Whilst the NEC is not law as such, in practice it has been adopted by most states as their set of rules for electrical installations and wiring in buildings (with a few changes here and their depending on the state you are in), and so is now in practice the Electrical Building Code for the United States.

You can read the full 1000 pages plus version online for free here: Building Codes

This is the book that all Journeyman Electricians will consume when undertaking their training, as it is pretty much the standard version across the country.

Though there are some differences between the states, and you can see the individual requirements for your state here: State Regulations

Some of the key NEC rules that need to be followed when installing a new electrical system into a building are:

If you are planning on installing electrical wiring then you should refer to the NEC and your local Electrical Building Code for specifics and to the link above for any state specific requirements that you need to know.

Low-voltage landscape lighting is a simple improvement that can make an enormous impact on the beauty and appearance of your home after dusk, as well as its safety and security. Installed along walkways, steps, and driveways, or directed up at trees, garden objects and walls, the typical low-voltage lighting system requires just three components: a transformer, low-voltage electrical cable, and the fixtures.