Installation_Guide_Hazardous_Areas_intrinsic safety

Installation_Guide_Hazardous_Areas_intrinsic safety -...

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Installation guide for hazardous areas This installation guide should not be used as the controlling document for the installation of devices in a hazardous area. This guide is NOT A CONTROL DRAWING. Any installation of devices within a hazardous area as defined in the NEC ® MUST BE in accordance with that device's CONTROL DRAWING and local ordinances.
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Page 2 of 20 a a Table of contents Acronyms, terms and definitions. ..................................................................... 3 1.0 Introduction. .................................................................................................. 4 1.1 The fire triangle. ........................................................................................ 4 1.2 Fire loss control . ....................................................................................... 5 1.3 The National Electrical Code ® ................................................................. 6 2.0 Hazardous areas and classifications. ......................................................... 7 2.1 Class, Division and Zone. ......................................................................... 7 2.2 Methods of protection . .............................................................................. 9 2.2.1 Intrinsic safety. ................................................................................. 10 2.2.1.1 Intrinsically safe apparatus entity parameters. ........................... 11 2.2.2 Explosion proof. ............................................................................... 13 2.2.3 Air purge . ......................................................................................... 13 2.2.4 Other methods. ................................................................................ 13 2.3 Class I, Division 2 locations. ................................................................... 13 2.4 Wiring methods. ...................................................................................... 14 2.4.1 Intrinsically safe circuits . .................................................................. 14 2.5 Marking examples . ................................................................................. 15 3.0 Wiring Wilcoxon intrinsically safe sensors . ............................................ 15 3.1 Dynamic vibration sensor wiring. ............................................................ 15 3.1.1 Effects of barrier on bias output voltage (BOV). ............................... 15 3.1.2 Troubleshooting. .............................................................................. 17 3.2 LPS 4-20 mA sensor wiring . ................................................................... 18 3.2.1 Troubleshooting the 4-20 mA LPS wiring. ........................................ 19 4.0 Technical assistance. ................................................................................. 20 4.1 Technical and application assistance . .................................................... 20 4.2 Customer service. ................................................................................... 20
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Installation_Guide_Hazardous_Areas_intrinsic safety -...

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