| National Electrical Code, 2008, NFPA 70 |
| National Building Code |
| ASHRAE - American Society of Heating, Refrigeration and Air-Conditioning Engineers |
| ASME - American Society of Mechanical Engineering |
| ASTM - American Society of Testing and Materials |
| AWS - American Welding Society |
| National Fire Protection Association (NFPA) |
| NFPA 90A, Air Conditioning and Ventilating Systems, 2009 |
| NFPA 101, Life Safety Code, 2009 Edition |
| IBC - International Building Code |
| IEEE - Instutute of Electronics and Electrical Engineers |
| CE or UL certified electrical equipment |