NFPA 70 电气规范
日期:2012-02-08 16:41
de a building or terminate immediately inside a building wall.
Technology is speeding ahead and so is the NEC. Stay up-to-code with the 2011 National Electrical Code direct from NFPA.
Adopted in all 50 states, NFPA 70 National Electrical Code has saved untold lives with comprehensive requirements for electrical wiring and equipment. When the Code advances to incorporate new technologies, you cant afford to fall behind! You need the 2011 NEC to safeguard people and property, and avoid violation
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