This section requires electrical equipment, such as switchboards, panelboards, industrial control panels, meter socket enclosures, and motor control centers, to be marked with a warning label. This label should be clearly visible to qualified personnel before they do any maintenance, servicing, or examination on the equipment. The purpose of this requirement is to raise awareness of potential electric arc flash hazards and reduce the number of accidents that occur when electricians do not wear the required protective clothing while working on energized equipment. Exhibit 110.7 illustrates a typical warning label, while Exhibit 110.8 shows a worker in proper protective clothing working in front of an energized panelboard. Employers should follow the safety-related work practices outlined in NFPA 70E to ensure a safe workplace for their employees. More information on this topic can be found in the 1997 report “Hazards of Working Electrical Equipment Hot” published by the National Electrical Manufacturers Association.
NEC Article 110.16 Arc-Flash Hazard Warning
All electrical equipment located in areas other than dwelling units, such as switchboards, panelboards, industrial control panels, meter socket enclosures, and motor control centers, must be field marked in order to warn qualified personnel of potential electric arc flash hazards. These labels must be clearly visible to qualified personnel before they begin any examination, adjustment, servicing, or maintenance of the equipment. This regulation is in place to ensure the safety of personnel by raising the level of awareness of the dangers of electrical arc flash hazards.
This section requires that all electrical equipment located in areas other than households, such as switchboards, panelboards, industrial control panels and motor control centers, must be marked to warn qualified personnel of potential electric arc flash hazards. This marking must be easily visible before any examination, adjustment, servicing or maintenance of the equipment is done. This is to ensure the safety of personnel by making them aware of any potential dangers. Exhibit 110.7 and 110.8 show examples of this requirement. The worker in Exhibit 110.8 is wearing personal protective equipment (PPE) that is considered suitable for the flash hazard. This PPE is described in the NFPA 70E, Standard for Electrical Safety in the Workplace.
Electrical Inspectors)
This section is put in place to ensure the safety of personnel when working on electrical equipment. It requires that all electrical equipment located in non-residential areas must be marked to warn qualified personnel of potential electric arc flash hazards. The marking must be easily visible before any work is done on the equipment. This is to remind workers to turn off the power before working on electrical circuits and to be aware of any potential hazards. This requirement does not apply to equipment in dwelling units, but it does apply to larger services like those found in multifamily dwellings.
This section requires all electrical equipment located in non-residential areas to be marked with warning labels to warn qualified personnel of potential electric arc flash hazards. This is to ensure the safety of personnel when working on electrical equipment, by reminding them to turn off the power before working on electrical circuits and to be aware of any potential hazards. This requirement does not apply to equipment in dwelling units, but it does apply to larger services found in multifamily dwellings. Employers should make sure NFPA 70E safety-related work practices are implemented and followed. More information on this subject can be found in the 1997 National Electrical Manufacturers Association report, “Hazards of Working Electrical Equipment Hot.”
This section requires warning labels to be placed on all electrical equipment in non-residential areas to alert qualified personnel of potential electric arc flash hazards. This ensures safety when working on electrical equipment by reminding personnel to turn off the power before working and to be aware of any potential hazards. This requirement does not apply to equipment in dwelling units, but does apply to larger services found in multifamily dwellings. Employers should make sure NFPA 70E safety-related work practices are implemented and followed. More information on this subject can be found in the 1997 National Electrical Manufacturers Association report, “Hazards of Working Electrical Equipment Hot.” Additionally, NFPA 70E-2009 and ANSI Z535.4-1998 provide assistance and guidelines for the design of safety signs and labels.
