COMPLIANCE INFO_1999-2005 - Laserfiche WebLink

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National Electrical Code Compliance Introduction National Electrical Code Compliance The following information is for general reference and is not intended to replace recommended National Electric Code(NEC)procedures.It is important for the installer to understand that electrical equipment and wiring located in Class I,Division 1 and 2 installations shall comply with the latest appropriate Articles found in the National Electric Code(NFPA 70)and the Automotive and Marine Service Station Code(NFPA 30A). Probe- and Sensor-to-Console Wiring Wire Type for Bonded Metal Conduit Although shielded cable is preferred in all installations,Veeder-Root allows the use of non-shielded cable when using bonded metal conduit from the probe/sensor junction box to the TLS Console.There is one exception—shielded cable is REQUIRED at all sites using variable speed submersible pumps. Important o:T The wiring MUST be contained in bonded metal conduit the ENTIRE way to the console, including wiring located indoors. If non-bonded conduit(such as plastic raceways)are being used, shielded cable is required.Bonded conduit means that the metallic sections of conduit are permanently joined to form an electrically conductive path that will assure electrical continuity, and that the conduit has the capacity to conduct safely,any current likely to be imposed.When not using shielded cable,the probe and sensor wiring must conform to Article 501-13 of the NEC (Conductor Insulation,Class I,Divisions 1 and 2),e.g.,nylon-jacketed conductor type THWN. Note:The conductor itself must bear the marking legend designating its use as suitable for gasoline exposure; such designation on the tag alone is not sufficient. Wire Type for Non-bonded Metallic or PVC Conduit Veeder-Root requires the use of shielded cable when using non-bonded metallic or PVC conduit in any portion of the wiring between the probe/sensor junction box and the TLS Console.In these installations,shielded cable must be rated less than 100 picofarad per foot and be manufactured with a material suitable for the environment, such as CarolTM C2534 or BeldenTM 88760,8760. Wire Length Improper system operation could result in undetected potential environmental and health hazards if the probe-or sensor-to-console wire runs exceed 1000 feet.Wire runs must be less than 1000 feet to be UL acceptable for this application. Splices Veeder-Root recommends that no splices be made in the wire run between a sensor or probe junction box and the console.Each splice degrades signal strength and could result in poor system performance. 4