“A SAFETY PROCEDURE THAT DOESN’T WORK”

by Jun 21, 2017Unsafe Work Practices

CURRENT FLOWS IN ALL CURRENT PATHS.  (Ohms Law)

 

IF THE NETWORK IN THIS SKETCH BECOMES ENERGISED FOR ANY REASON INCLUDING EARTH FAULTS, INDUCED VOLTAGE, LIGHTNING STRIKE OR ACCIDENTAL ENERGISATION, THE WORKERS ON TOWER ‘B’ ARE NOT PROTECTED.

FOR EXAMPLE: CURRENT WILL FLOW THROUGH THE EARTH ROD AT TOWER ‘A’, CURRENT WILL FLOW THROUGH THE EARTH ROD AT TOWER ‘C’ AND CURRENT WILL FLOW THROUGH THE WORKERS ON TOWER ‘B’ AS THEY ALSO FORM A CURRENT PATH THROUGH THE EARTHED STEELWORK.  

THE EARTHING AND SHORT-CIRCUITING ARRANGEMENT ILLUSTRATED ALSO CAUSES ADDITIONAL DANGER FOR WORKERS AS THE EARTH LOOP CREATED BY THE EARTH RODS FACILITATE THE PRESENCE OF INDUCED VOLTAGE.

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Remember..

“CURRENT FLOWS IN ALL CURRENT PATHS”             “BOXED IN” =  NO PROTECTION.
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