Fairbanks MATRIX SCALE HIGHWAY SCALE SYSTEM - Manual (Page 30)

Section 4: Wiring
11/12 30 51182 Rev. 2
Grounding
Intalogix
™
Technology systems require one (1) grounding rod per weighbridge, and
one (1) grounding rod per Pit Power Supply.
• These grounding rods are supplied with the scale.
• For accurate operation and protection against damage from lightning strikes, all of
the components of the system must be properly grounded.
Use the following guidelines to correctly ground the system.
• Use 8 AWG or larger wire, or braided ground straps.
• All ground connections should be two feet
(2’), or as short as possible.
• The SSCs and PPSs housing attaches in a clean electrical connection to the
platform frame. The platform frame is then connected to a pit ground rod.
• The insulated WHITE WIRE from the PPS connects directly to the separate
ground rod, and not to the same rod as the weighbridge.
• The 117 VAC SVP Unit connects to a known good ground at the instrument
location.
─
Use a voltmeter to test the electrical power source available.
─
The Neutral-to-Ground voltage level must be 0.2 VAC or less.
─
If unsure, or if the testing reveals higher than 0.2 VAC, install a separate
ground rod at the SVP location, connecting it with braided cable or 8 AWG
wire
C A U T I O N
Proper grounding is REQUIRED
so the Surge Voltage Protection (SVP) adequately shields the
scale from lightning and other electrical interferences!