| 摘要 |
A switchboard including at least four conductors of horizontal configuration, the conductors secured to the switchboard to maintain the horizontal configuration, wherein at least one of the four conductors of horizontal configuration is an AC PEN (23) and at least one of the four conductors of horizontal configuration is a DC ground; at least one uninterrupted power supply and battery mounted in the switchboard and operatively connected to the DC ground (23); and at least one uninterrupted power supply and battery mounted in the switchboard and operatively connected to the AC ground (23).
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