Site Preparation
Foundation Requirements
The standard non-walk-in enclosure is designed for installation on a concrete pad. Refer to the factory order drawings for any additional mounting details which may be required on specific orders. The pad must be flat and leveled to 1/8-inch per square yard to help ensure proper alignment and to help prevent distortion of the gear.
Conduit Location
Typical Floor Plan–36 in. (914 mm) Wide Unit (not for construction) and Typical Floor Plan–48 in. (1219 mm) Wide Unit (not for construction) illustrate typical floor plans. Refer to the applicable drawings before using the typical foundation specifications.
Conduit should be stubbed a maximum of one inch (25 mm) above the Masterclad floor. Conduit placement must be accurate to assure alignment within the designated conduit area in the floor of the equipment to avoid mechanical interference with the switchgear floor. See following figures.
Floor plates must be installed with cutouts for the conduit to create a barrier to block moisture or pests from entering the switchgear compartment. Employ conduit hubs or a similar system to create a continuous barrier between the area below the switchgear and the switchgear compartment.
Avoid continuous loops of reinforcing rod in concrete or structural steel that do not enclose all three phase conductors of the same circuit.