Title :
Objectionable currents associated with shock, fire and destruction of equipment
Author :
Carpenter, David R. ; Willingham, John
Author_Institution :
Integrity Inst./Univ. of Alabama, Florence, AL, USA
Abstract :
This paper identifies objectionable currents in relation to improper wiring methods which result in fire, shock and the destruction of equipment. This information will assist those responsible for electrical safety, reliability and production. It also presents an understanding of the source and misapplication that often associate with objectionable currents. The information contained in this document should be useful threefold: 1) How to control objectionable currents which are responsible for the destruction of sensitive electronic equipment, shock hazards and fire hazards within a premise wiring system, based on testing models discovered with experiments. 2) Determine the reliability of existing accepted wiring methods. Experiments and tests were explored to prove or disprove existing best practice, codes, standards and theorems. 3) As a tutorial to properly apply theory, codes and standards, plus the proven reasons to why, where and how best practices and standards are apply.
Keywords :
electric shocks; electronic equipment testing; fires; hazards; wiring; electrical production; electrical reliability; electrical safety; equipment destruction; equipment fire; equipment shock; fire hazards; improper wiring methods; objectionable currents; sensitive electronic equipment; shock hazards; Bonding; Conductors; Current measurement; Fasteners; Grounding; Metals; Wiring; Equipment Ground, Protective Ground or Grounding Conductor - the conductor required to facilitate an overcurrent protection device when a ground fault occurs. Adapted from NFPA 70 section 100 Definitions; Neutral or Grounded Circuit Conductor - a system or circuit conductor that is intentionally grounded. Adapted from NFPA 70 section 100 Definitions; Objectionable Current - the term objectionable current and stray current are used interchangeably in most nomenclature. Objectionable currents are considered to be objectionable when currents are flowing in a conductive path which is unintended and undesirable. This does not include electrical noise such as differential, transverse or common mode noise.; Premise Wiring System - wiring on the secondary side of service equipment. Adapted from NFPA 70 section 100 Definitions; Stray Current - the term stray current is similar to the term objectionable current because it is reference to currents which flow in unintended paths. Stray currents include electrical noise.;
Conference_Titel :
Electrical Safety Workshop (ESW), 2015 IEEE IAS
Conference_Location :
Louisville, KY
Print_ISBN :
978-1-4799-4783-6
DOI :
10.1109/ESW.2015.7094952