fmtjfw
Senior Member
- Location
- Fairmont, WV, USA
I'm looking for constructive criticism on the following, and if you think it is merited, support in the form of comments from you on 10-53a_240.87B5I2 Thanks, Jim Williams
4 Comment:
240.87 Noninstantaneous Trip.
(B) Method to Reduce Clearing Time.
(5) An approved equivalent means
Informational Note No. 2: Exception: An energy-reducing active arc flash mitigation system helps in reducing arcing duration in the electrical distribution system. No change in circuit breaker settings or the settings of other devices is required during maintenance when a worker is working within outside an arc-flash boundary as defined in NFPA 70E-2012, Standard for Electrical Safety in the Workplace.
Informational Note No. 1: An energy-reducing maintenance switch allows a worker to set a circuit breaker trip unit to ?no intentional delay? to reduce the clearing time while the worker is working within an arc-flash boundary as defined in NFPA 70E-2009, Standard for Electrical Safety in the Workplace, and then to set the trip unit back to a normal setting after the potentially hazardous work is
complete. [ROP 10?53a]
5 Statement of Problem and Substantiation.
Protection not required when outside. Change <info 2> to exception. Move to above original <info 1>
4 Comment:
240.87 Noninstantaneous Trip.
(B) Method to Reduce Clearing Time.
(5) An approved equivalent means
Informational Note No. 2: Exception: An energy-reducing active arc flash mitigation system helps in reducing arcing duration in the electrical distribution system. No change in circuit breaker settings or the settings of other devices is required during maintenance when a worker is working within outside an arc-flash boundary as defined in NFPA 70E-2012, Standard for Electrical Safety in the Workplace.
Informational Note No. 1: An energy-reducing maintenance switch allows a worker to set a circuit breaker trip unit to ?no intentional delay? to reduce the clearing time while the worker is working within an arc-flash boundary as defined in NFPA 70E-2009, Standard for Electrical Safety in the Workplace, and then to set the trip unit back to a normal setting after the potentially hazardous work is
complete. [ROP 10?53a]
5 Statement of Problem and Substantiation.
Protection not required when outside. Change <info 2> to exception. Move to above original <info 1>