Electrical Continuity Alone Is Not Enough

Blasters check continuity during explosives safety training supported by ERM.

Blasters check for continuity during explosives safety training supported by ERM.

Recently, ERM assisted a client with a safety issue regarding the use of electric detonators.  The client’s safety policy called for ensuring that electric detonator circuits showed “continuity” before attempting to fire the shot.

Although that is a good practice, we advised the client that a better practice would be to require measurement of the circuit resistance and comparison of that number to the expected resistance. Continue reading

ERM Supports Revision of the NFPA Fire Protection Handbook

nfpaThe National Fire Protection Association (NFPA) and Explosives Risk Managers (ERM) reached an agreement today for ERM to update a chapter from the 20th edition of the Fire Protection Handbook; specifically Chapter 6.15 Explosives and Blasting Agents.  The 20th edition was available in 2008.

The completion date for this project mid-April 2015.  The publication will be available in hard copy or a new e-version from NFPA several months later.

 

 

RF Hazards to Electric Detonators

An old discussion on radio frequency (RF) hazards on Linked In’s Blasting Professionals group resurfaced recently.  Several participants have asked ERM for RF incident reports from our files, which we gladly provided.

We understand completely the desire for documentation, but it strikes us that some people may doubt whether or not an electric detonator can be initiated with RF.  Uhh, let’s see here…every wireless device created by man converts radio wave energy into electricity and we’re wondering what again?
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