MEC 2 MICROPROCESSOR ENGINE/GENERATOR CONTROLLER
PM056 Rev 6 05/10/15 Thomson Technology
9
2.8.4. Crank & Preheat Output Wiring #14 AWG (2.5mm
2
) (To pilot
relays)
2.8.5. Speed Sensing Wiring #16 AWG (1.5mm
2
) 2
Conductor Shielded Cable
2.8.6. Metering Voltage Inputs #16 AWG (1.5mm
2
)
2.8.7. Metering Current Inputs (from CT’s) #14 AWG (2.5mm
2
)
For distances exceeding 100 Ft. (30m) consult Thomson Technology.
For unit mounted control panels, wire sizes may be reduced to the next smallest
wire size available.
2.9. REMOTE START CONTACT FIELD WIRING
Field wiring of a remote start contact from a transfer switch to a control panel should
conform to the following guidelines to avoid possible controller malfunction and/or
damage.
2.9.1. Remote start contact wires (2 - #14 AWG (2.5mm
2
) should be run in a
separate conduit.
2.9.2. Avoid wiring near AC power cables to prevent pick-up of induced
voltages.
2.9.3. An interposing relay may be required if field wiring distance is excessively
long (i.e. greater than 100 feet (30m) and/or if a remote contact has a resistance
of greater than 5.0 ohms.
2.9.4. The remote start contact must be voltage free (i.e. dry contact). The use
of a “powered” contact will damage the engine controller.
2.10. MEC MOUNTING LOCATION/INSTALLATION
The MEC 2 Engine-generator controller is designed for mounting directly onto a control
panel door. Considerations should be given for the following:
• The controller should be installed in a dirt free, dry location away from
extreme heat sources.
• The LCD window should be installed at an optimum height for operator
viewing.
• Adequate space should be provided around the rear of the MEC 2 circuit
board for control wiring.
• Verify that the intended AC voltage input to the controller does not exceed
the maximum allowable level on the control panel door as per the applicable
control panel certification standard.
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