2. Pre-Installation
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031-103-B0-003 Rev. C
© 2002
TM
Pads can either be poured on site, or precast by Alpha Technologies. Available concrete pad configurations and part numbers
can be found in section 5, "Alpha Part Numbers".
All dimensions shown in inches. Mounting holes and sweeps indexed from this position.
Indicates PN-3 and PN-4 pedestal enclosure mating surface.
Alpha standard; recommended distance (6" minimum) between edge of pad and cabinet.
Four inch diameter hole for AC power IN (non-metered installation).
Four inch diameter opening for DC Output cable and Status Monitoring harness.
All mounting hardware must be stainless, galvanized, or better to prevent corrosion.
5" x 8" rectangular cutout (2 places), open area for all internal connections including: generator power
and/or coax cable conduit sweeps.
A 25+ year continuous vapor barrier must be used between the enclosure and the pad to prevent
moisture ingress and possible corrosion caused by metal to concrete contact. The vapor barrier material
(such as 30 lb felt, neoprene pond liner, or heavy grade tar paper) must be initially extended at least 6"
in all directions around the perimeter of the enclosure. After the enclosure is secured to the pad, the
material can be cut closer to the enclosure, using the appropriate knife or cutting tool.
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6
7
1
7
2
6
3
8
5
4
7
1
2
3
4
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2.2 Concrete Pad Preparation
Figure 2-2; Single-Wide Concrete Pad for PN-3 and PN-4
