Fairbanks 12-1492 - 12-1496 A.A.R. Combination Railroad Track/MTS - Manual (Page 13)

04/12 13 50538 Rev. 7
Cabling:
All cabling between loadcells, junction boxes, and electronic instrumentation shall conform to
the following:
All cable shields shall be interconnected and carried to a single ground. This should be a sep-
arate ground from the power source ground and be provided for the loadcells and instrumen-
tation circuits only. It should be a copper rod which, when possible, is driven to the depth of
the water table.
The connection between the ground rod and the common ground point of the load cell and
instrumentation circuits shall be made with copper wire, or the equivelant, of No. 10 gauge or
larger.
All cable shields in the load cell circuits shall be grounded at one end only.
Homerun cables shall be physically separate from power cables and never run in the same
conduit system.
(NOTE: A 24 inch to 36 inch separation is required by Fairbanks Scales)
All cable connections, junction boxes, etc., in the load cell circuits shall be properly protected
against the effects of moisture.
All multi - conductor cabling shall be color - coded, or provided with other means of identifica-
tion of the individual conductors.
1-E: Foundation Construction & Installation
Use only certified prints that are marked for the particular installation, customer, and scale.
All the dimensions indicated on the certified prints must be rigidly and faithfully followed dur-
ing all phases of construction. There is very little tolerance for misplacements and mistakes.
Pier heights are especially critical as there must be enough space for finishing grout under all
stands (per certified drawings) while rails on the scale weighbridge and approach rail must be
absolutely level.
Placement of foundation bolts is absolutely critical to the successful installation of the scale.
The use of a template or form that matches the design called for can be used. Foundation
bolts must NOT be installed at an angle, too deep, or too shallow. Very close tolerances must
be met on all aspects of pit construction.