The nec does have provisions for 1200 amps or more and is covered in 110 26 in the 2011 edition.
Electrical panel door swing.
This requirement can be met by the use of an insu lated twist on or push on wire connector.
Latches have a spring wire cam that slips under a receiving catch on a cabinet body to create tension and hold cabinet doors and drawers closed.
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Figure 110 11 author s comment.
Swing handle keyed cam locks.
Prevent an electrical hazard the free ends of the conductors must be insulated to prevent the exposed end of the conductor from touching energized parts.
Andersen tribeca style gliding door thumb latch in white color.
For the typical electrical room or electrical closet where there is perhaps one or even a few panels doors can swing into the room.
Updates to working space clearance around electrical equipment according to nec 2017.
Entrance for panel more than 1200 amp and over 1 8 m wide one entrance required for working space not less than 610 mm wide and 2 0 m high personal door for panel more than 1200 amp personnel door s intended for entrance to and egress from the working space less than 7 6 m from the nearest edge of the working space.
See the definition of energized in article 100.
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