ANSI/NEMA PB 1.1-2013 provides general instructions for proper handling, installation, operation, and maintenance of panelboards, which are used in the distribution of electricity at 600 V or less with 1,600 A mains or less and 1,200 A branch circuits or less. Another standard, ANSI/NEMA PB 2.1-2013, provides general instructions for proper handling, installation, operation, and maintenance of deadfront distribution switchboards rated 600 V or less and 6,000 A or less.
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