You should be able to search the NEC on the internet. However, local code may play a role in whether or not you can use aluminum in an underground application. The other consideration would be whether or not it's listed as a `direct burial wire`, which is to say, is the insulation manufactured to be buried underground.
I'm not a big fan of aluminum, and if you're trying to save some money now, you'll most likely end up having to replace it within 5- 10 years. There's also been a lot of house fires attributed to aluminum wiring as it tends to overheat easier than copper.
So search the code on the internet, search your local codes and then go with copper direct burial cable anyway. You'll be happier in the long run. But yes, local amendments notwithstanding, the standard NEC does allow aluminum conductors with the proper insulation rating to be used underground. If it is installed in an underground raceway, it must be listed for wet locations, or for direct burial if buried.
role of national electric code in the design of electrical installation
The national electrical grid.
To install, maintain, and service electrical switch-gear, wiring, appliances, lighting (luminares), and related equipment. In most cases an electrician must be licensed by an authority (State or Provincial) and must ensure any installation or service work is performed to national, state/provincial, and local codes and ordinances.
The largest conductor listed in the National Electrical Code is a 2000 kcmil.
Beats me, the National Electrical Code does not list a #9 awg wire.
role of national electric code in the design of electrical installation
National Inspection Council for Electrical Installation Contracting was created in 1956.
National Inspection Council for Electrical Installation Contracting
National Electrical Code (NEC)
NEC Article 110.3 is "Examination, Identification, Installation and Use of Equipment."
The National Electrical Code: http://www.nfpa.org/aboutthecodes/AboutTheCodes.asp?DocNum=70&cookie%5Ftest=1
The National Underground was created in 2007.
In national parks it serves many functions from groundwater to hiding electrical lines to make the parks more appealing
The specifics of this are found in Article 430 of the National Electrical Code.
The National Electrical Code (US) would call it a "Solderless Pressure Connector - A device that establishes a connection between two or more conductors or between one or more conductors and a terminal by means of mechanical pressure and without the use of solder." Electricians call them "wire nuts".
That depends on the size of the conductor and the type, which is defined by its insulation. With many common large feeder conductors such as THHW, the largest conductor which you can run 8 of is # 2 gauge. Whereas common small branch circuit conductors such as # 12 THHN, you can run 138 ea. through a 2 " conduit. For the complete list, look at the chart titled "Maximum number of conductors in electrical metallic tubing" (EMT) in the National Electrical Code.
City of Greater Sudbury, Ontario, CA? The Municipal Bylaws (20-126095)(31-1) require installation and maintenance of all electrical supply connections within buildings to conform to the Ontario Electrical Code.