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  1. 09-21-2018, 16:34 #17
    PSS
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    NEC 702.4

    (B) System Capacity. The calculated load on the standby source must
    be in accordance with Article 220 or by another method approved by
    the authority having jurisdiction.
    (1) Manual Transfer Equipment. The optional standby power source
    must have adequate capacity for all equipment intended to operate at
    one time as determined by the user.
    Author’s Comment:
    n When a manual transfer switch is used, the user of the
    optional standby system selects the loads to be connected to
    the system, which determines the system kVA/kW rating.
    (2) Automatic Transfer Equipment.
    (a) Full Load. The optional standby power source must have adequate
    capacity to supply the full load transferred.
    Last edited by PSS; 09-21-2018 at 16:38.
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