Larco Safety Mat Systems - Manual (Page 10)

10
Installation, Use and
Maintenance Guide
a. Active Threshold Trim
Electrical Connections
With all the mats anchored in their proper position, the electrical connections from the mats to the control system can be
made. Please read the general instructions below and then refer to the specific wiring instructions included with your safety
mat control device.
Larco offers a variety of wiring options designed to adapt to specific installation requirements, but regardless of which one you
have chosen for your application, several basic rules apply in all cases.
Maintain fluid tight connections especially in wet applications. The Larco mat is built to be immune to fluid-intense
environments. It is the installer’s responsibility to maintain the fluid-tight integrity of the electrical connections to eliminate
fluid-related nuisance problems during operation.
Larco recommends that all electrical connections be made inside of a fluid-tight enclosure, such as the Zone Monitor or
Larco junction boxes for 5 or 10 mats.
If you must make electrical connections outside of a fluid-tight enclosure, be sure to choose a connection method that
maintains a dry connection.
Protect the wires from damage especially in traffic areas. Don’t leave wires exposed where they could become worn or
damaged. Use appropriate conduits or wire raceways to protect the wires.
Periodic Mat System Testing
With the installation phase complete, perform final testing of the overall system. Please read the following general instructions
and precautions, and then refer to the specific testing instructions included with your safety mat control device.
As with all safety related equipment, periodic testing to verify functionality must be performed per the equipment
manufacturers recommendations.
CAUTION: Do not over-tighten Active Threshold screws. The Active Threshold bridges the active surface of the
mat and can cause continuous activation if it is pulled down too tightly by the screws. The proper method for
adjusting Active Threshold screws is to tighten the screws until the screw head just makes contact with the
extrusion, and then back off 1/4 turn.
NOTE: Remember to use the blue anchor and the smooth shank screw for Active Threshold installations.