Gasboy Atlas Fuel Systems Site Prep Manual - Manual (Page 22)

Site Preparation Electrical Requirements
Page 18 MDE-4333E Atlas Fuel Systems Site Preparation Manual · November 2011
Commercial Data Wire Lengths
Use the following table to determine maximum Commercial data wire lengths.
For this Distribution Box
Distance Between the Distribution
Box and Dispenser
Distance Between the Distribution
Box and
Console/Controller
RS-485 Cable No more than 1000-feet from junction
box to farthest CFN or TopKAT
component No more than 1500-feet between all
CFN or TopKAT components
Grounding
GFI Breakers are required for DEF dispensers mounted on Skid Tanks because of no
underground piping, AC power in potentially wet area, and a potential for earth ground to
become broken if Skid Tank moves.
A GFI consists of a sensor that detects changes in the current to the load, by comparing the
current flowing to the load and the current flowing from the load. A drop-off in the current
equivalent to about 5 milliamperes, turns off all power by tripping a relay within the GFI
within a few hundredths of a second.
When powering a dispenser with a GFI, the return neutral of any device to which the dispenser
supplies power must be the same neutral as that of the dispenser. For example, the STP control
relay.
• NFPA 70 requires that you connect the following to system ground:
— Consoles
— Pumps and dispensers
— Submerged turbine pumps
— Relay control boxes
— Circuit breaker panel
— Electronic leak detectors
— Service module
— Distribution box
• Gasboy requires that you connect each pump/dispenser to an equipment grounding
conductor located in the conduit per NFPA 70, Article 250. The following is applicable to
ground conductor:
— Gasboy recommends using wire no smaller than 12 AWG. A larger wire may be
required per NFPA 70, Article 250.
— Use wire with green, or green and yellow striped insulation.
— Connect to grounding screw in junction box.
— Ground the providing power under NFPA 70, Article 250.
— Bond the neutral bus to an approved grounding electrode.
To ensure proper operation of the equipment and provide the required safety factors, this unit
must be grounded per the following:
• A ground wire (preferably green) must be connected between the unit’s AC junction box
ground lug and the main electrical service panel.
• One earth ground connection is required per unit.
• The ground rod must be a solid, corrosion-resistant conductor, and must be installed at the
main electrical panel in accordance with the National Electrical Code. It must be properly
tied into the ground bus strip of the panel.
• We recommend the neutral and ground bus strips be bonded together (unless prohibited by
local codes).