Hazardous Area Motors Explosion Proof
Frequently Asked Questions
Why dont you call them
explosion proof motors? Legal terminology has over the years defined explosion proof as something which will withstand an explosion. We are concerned with preventing an explosion in the first place. For liability reasons we must be very careful in our choice of words. Why doesnt Empire Magnetics offer explosion proof stepper motors? There are several reasons Empire Magnetics does not offer explosion proof stepper motors: 1) the legal costs associated with registering an explosion proof stepper motor are on the order of tens of thousands of dollars, and 2) once a motor is registered as explosion proof no changes can be made to the design. Can you give me more information about system implementation? For USA based customers, information can be obtained from the National Electric Code or from NFPA-496 - phone 800-344-3555. We apologize but we are not authorized to reproduce this copyrighted information. Furthermore, the party that supplies such information may be held liable for its contents. The information is available from equivalent agencies worldwide. Here are a few of the international agencies we are aware of: NFPA FM PH: 617-762-4300 UL PH: 312-272-8800 In other countries some of the appropriate agencies are:BASEEFA PH: 0298-6211 BEAMA-CEEFA PH: 01-427-0678 BSI PH: 041-629-9000 BSI Sales PH: 0908-320066 BVS PH: 0231-2491-0 CENELEC CERCHAR PH: 4-455-3500 CESI PH: 02-392-2125 CSA PH: 416-744-4145 CSA PH: 0908-315555 DEMKO PH: 02-947266 GAMBICA Association Ltd. PH: 01-437-0678 IEC INIEX PH:065-66-2343 IP PH: 01-636-1004 LCIE PH: 645-2184 LOM PH: 442-1987 PTB PH: 0531-592-2757 RIIS SAA PH: 929-6022 Are the purged and pressurized motors explosion proof? No. The term "explosion proof" means that the motor is capable of withstanding and containing an internal explosion. The concept of the purged and pressurized motor is to eliminate the explosion risk by keeping the hazardous materials outside the motor. Empire Magnetics purged and pressurized motors are designed to work within a system that meets the National Fire Protection Agency (NFPA) requirements for class I, II, and/or III environments (see NFPA 496, "Purged and Pressurized Enclosures for Electrical Equipment in Hazardous Locations"). Does Empire Magnetics offer engineering assistance for designing the system? No, for legal reasons cannot offer engineering assistance other than to recommend consulting the NFPA 496 guideline. Where can I find pressure switches and temperature monitors for my system? Pressure switches and temperature monitors are available from Omega (800 826 6342). |