INSTALLATION, OPERATIONS AND MAINTENANCE MANUAL 9
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06
—
06
Indoor switchboard
mounted on floor
channels
—
05
—
05
Indoor switchboard
bolted to the floor
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07
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07
Outdoor switchboard
installation
Outdoor Equipment
It is recommended to have outdoor equipment
installed on a smooth, level concrete pad.
When optional channel sills are supplied with
the switchboard, set them on the pad and fill
them with grout, as shown in Figure 7.
The switchboard must be bolted directly to the
floor, as shown in Figure 5. The floor must be
level or floor channels must be used to avoid
misalignment of sections, doors, and other
subsystems.
If steel floor channels are used, embed them in
a level concrete slab, with the top surface of the
channels flush with the finished floor. To avoid
distortion of the switchboard structure, the steel
channels must be level and aligned with each other
before the equipment is anchored.
The recommended foundation construction
and method of mounting the switchboard to
the foundation are shown in Figure 6. Channels
should be grouted after installation. If using a
housekeeping pad, be sure to verify device
handle elevations according to NEC 490.41.
Regardless of which installation method is used,
the mounting surface must be level to within .25"
over a 10' span to prevent distortion of the
switchboard structure, to assure proper
mechanical and electrical connections between
shipping splits, and to assure proper interfacing to
other close-couple equipment. Anchor bolts and
channels are to be provided by the purchaser.
1/2" anchor
bolts
Front 1/2" anchor
bolts
Front
1
⁵
/₈
Pad with sills
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