System and method for relocating branch circuit electrical cables from an existing electrical enclosure

An electrical enclosure assembly for attachment to an existing electrical enclosure comprising:

• an enclosure structural core having a rear panel and side panels defining an interior of the enclosure structural core, the side panels including a top side panel, a bottom side panel, a long side panel, and a discontinuous short side panel that surround a top opening, the long side panel longer than the discontinuous short side panel;
• the rear panel having a main portion and an extension portion co-planar with the main portion, the extension portion extending from the main portion beyond the discontinuous short side panel and configured to be secured to the existing electrical enclosure;
• at least one of the top or bottom side panels having one or more structural core cable entry points defined therein, an obtuse angle being formed between the discontinuous short side panel and the at least one of the top or bottom side panels, the at least one of the top or bottom side panels positioned to receive branch circuit electrical cables relocated from the existing electrical enclosure without additional cable length required;
• the discontinuous short side panel having a panel opening configured to be positioned in alignment with one or more existing cable entry points in the existing electrical enclosure when the enclosure structural core is secured to the existing electrical enclosure;
• and
• an openable cover securable over the top opening for providing access to the interior of the enclosure structural core, the openable cover having an extended overhang portion which extends outwardly over the discontinuous short side panel and abuts against and is configured to be secured to the existing electrical enclosure,
• wherein when the electrical enclosure assembly is secured to the existing electrical enclosure, the enclosure structural core is an additional electrical enclosure.