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1. This presentation was made at BEMAs Winter Summit by Mark Frey, Vice President/Director Electrical Engineering & AutomationHixson Architects & EngineersSunday, March 2, 2008Educational SessionPosted with permission on www.bema.org.
3. Overview Background
NFPA-70E Standard for Electrical Safety in the Workplace
How equipment design can help
Impact on Service Technicians
NEC 409 Industrial Control Panels
Summary
Q&A
4. Background Each year approximately 300 workers die from electrocutions at work.
Tens of thousands more are injured resulting in lost time
There are hundreds of thousands more near misses.
5. Background Mandated that an employer provide a safe work place.
Defines national consensus standards as the starting point for employee safety.
Provides for specifics related to safety requirements.
Authorizes OSHA as both an inspection and enforcement agency.
6. Background NFPA-70E, Standard for Electrical Safety in the Workplace was first published in 1979.
It was revised in 1981, 1983, 1995, 2000.
In 2004 the seventh and current edition was published.
7. NFPA-70E Designed to protect workers from:
Electrical shock
Thermal Burn
Arc Flash
Arc Blasts
8. NFPA-70E
9. NFPA-70E However, having to wear PPE:
Adds time
Inhibits productivity
Can be uncomfortable at best in a hot bakery environment
Equipment design can help
10. How Equipment Design Can Help
11. How Equipment Design Can Help
12. How Equipment Design Can Help
13. NEC-409
14. NEC 409 Industrial Control Panel
600 Volts and Less
2 or more components
15. NEC 409 Industrial Control Panel
600 Volts and Less
2 or more components
16. NEC 409 Industrial Control Panel
600 Volts and Less
2 or more components
17. NEC 409
18. Summary Consider NFPA-70E requirements when designing equipment:
Separate enclosures for line voltage and control voltage
< 50Volt Control voltage
Provide voltage monitors
Provide infrared windows at line terminals
Apply other technologies as they develop
Be aware of training, equipment and PPE requirements for service technicians at customer facilities.
19. Summary Consider the requirements of NEC-409 for Industrial Control Panels:
Labeling requirements
SCCR ratings
Design and layout
20. Questions ?