| CPC H02G 3/22 (2013.01) [H02G 3/081 (2013.01); H02G 3/32 (2013.01)] | 20 Claims |

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1. A panel assembly, comprising:
a mounting plate configured to be connected to a bottom box;
a connecting plate detachably connected to the mounting plate; and
a panel disposed on the connecting plate,
wherein at least one tension strap is connected between the connecting plate and the mounting plate, and
wherein when the connecting plate is detached from the mounting plate, the connecting plate and the mounting plate remain connected through the at least one tension strap.
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