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Hi Jim, 1. Any mandatory code for hobbyists would be de facto unenforceable. 2. Murphy was an optimist. ;^)) Matt D. -----Original Message----- From: Jim Mora <wavetuner@xxxxxxxxx> To: 'Tesla Coil Mailing List' <tesla@xxxxxxxxxx> Sent: Thu, Aug 21, 2014 7:53 am Subject: Re: [TCML] NIST High Voltage Laboratory Testing / Safety Reference Hi Dave, Thank you. This is excellent and really common sense information. The question now arises when this will become mandatory code for the HV hobbyist or is it already? My new Murphy law addition after breaking my leg with a transformer: "If an accident is possible, it eventually will happen at the worst possible moment". Jim Mora -----Original Message----- From: Tesla [mailto:tesla-bounces@xxxxxxxxxx] On Behalf Of David Sharpe Sent: Wednesday, August 20, 2014 4:10 AM To: Tesla Coil Mail List Subject: [TCML] NIST High Voltage Laboratory Testing / Safety Reference Truly excellent reference for use when designing medium or high voltage equipment or performing HV lab work, from NIST. This document was referenced in a recent EDN e-blog. The great thing about this document is it is succinct, brief (9 pages), specific, and to the point. http://www.nist.gov/el/isd/mmc/upload/high_voltage_rules_revised.pdf <One recommendation is the requirement of having "2" separate operations to turn on high voltage; this requires at a minimum a Main Disconnect (Lockable Safety Switch) and a start-stop push-button station with seal in contactor. This requirement supports my contention you should never "instant on" high voltage equipment. YMMV, but I've seen catastrophic, spectacular failures doing this. <snip> _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla