Electric Fence

Electric Fence
Name	Electric Fence
Type	perimeter security device
Invented	19th century
Service	fencing, containment, deterrence

Electric Fence

An electric fence is a barrier that uses electric shocks to deter passage by people or animals. Originating from early experiments in electrification, it has been used across United Kingdom, United States, Australia, and South Africa for agricultural, correctional, and security purposes. Designs and implementations intersect with innovations from Thomas Edison, Nikola Tesla, and 20th-century advances in General Electric and Siemens AG technologies.

History

Electric fencing traces roots to 19th-century electrification projects such as the War of Currents era infrastructure developed by Thomas Edison and Nikola Tesla. Early agricultural trials in the United States and Australia adapted electric energizers derived from telegraph and Railroad signaling systems. In the 20th century, companies like General Electric and Siemens AG commercialized energizers and insulation technologies, while legal frameworks in jurisdictions including United Kingdom and France evolved after incidents near industrial installations. Military applications prompted research during periods surrounding the World War I and World War II eras, influencing perimeter systems later used by institutions such as Guantanamo Bay detention camp and high-security prisons in United States corrections history.

Types and Components

Electric fence systems vary: portable agricultural arrays used by Royal Society for the Prevention of Cruelty to Animals-linked programs, permanent high-voltage deterrent systems for prisons and borders, and electrified barriers combined with physical fencing used by corporations like Rheinmetall and BAE Systems for facility protection. Core components include energizers produced by manufacturers such as Schneider Electric and ABB, insulated posts molded by firms in Germany and Italy, earthing systems referenced by standards from bodies like British Standards Institution and International Electrotechnical Commission. Ancillary parts—warning signs often conforming to protocols from agencies like International Labour Organization, remote monitoring units tied to Siemens AG SCADA platforms, and battery banks from suppliers such as Tesla, Inc.—complete system installations.

Operation and Technology

Energizers convert alternating current from utility grids in markets like United States and European Union to pulsed high-voltage outputs; early patents mirrored inventions by companies related to Westinghouse Electric Corporation. Pulsed output characteristics draw on research from institutions such as Massachusetts Institute of Technology and Imperial College London in electrical transient behavior. Conductors—steel wire or aluminum tape—connect to insulators developed by chemical firms with histories linked to DuPont and BASF. Sensors and telemetry integrate with control systems influenced by Siemens AG and Honeywell International, while standards from International Electrotechnical Commission define measurement of joule output, pulse duration, and maximum open-circuit voltage used across installations in Canada, New Zealand, and South Africa.

Safety and Health Effects

Safety considerations reference protocols from World Health Organization, National Institute for Occupational Safety and Health, and European Medicines Agency's advisories about electrical hazards. Health effects research has involved hospitals affiliated with Johns Hopkins University and Mayo Clinic for studies on cardiac risk in people with pacemaker devices produced by manufacturers like Medtronic and Boston Scientific. Regulatory testing laboratories such as Underwriters Laboratories and TÜV Rheinland evaluate compliance with standards set by International Electrotechnical Commission and British Standards Institution. Human-rights organizations including Amnesty International and Human Rights Watch have documented incidents at detention facilities involving electrified barriers, influencing policy debates in bodies like European Parliament and national legislatures in United States and United Kingdom.

Applications and Uses

Primary uses encompass livestock containment on ranches across United States, Australia, and New Zealand; wildlife exclusion projects coordinated with agencies like World Wide Fund for Nature and U.S. Fish and Wildlife Service; perimeter security for airports overseen by authorities such as Federal Aviation Administration; and correctional facility deterrence in systems implemented by state departments of corrections in United States and prison authorities in South Africa. Commercial security firms such as G4S and Securitas AB deploy integrated electrified barriers with CCTV from Hikvision or Axis Communications and intrusion detection suites influenced by Bosch Security Systems research. Temporary electric fencing supports humanitarian operations coordinated by United Nations High Commissioner for Refugees in emergency camps.

Legal and Regulatory Issues

Regulation varies: jurisdictions including United Kingdom, Australia, France, and multiple United States states maintain statutes or codes addressing installation, signage, and voltage limits; enforcement agencies include local councils and national safety regulators like Health and Safety Executive in United Kingdom and Occupational Safety and Health Administration in United States. Liability disputes have been litigated in courts such as the Supreme Court of the United States and national courts in Australia with case law affecting manufacturers including Schneider Electric and ABB. International standards from International Electrotechnical Commission and guidance from World Health Organization shape cross-border procurement for projects funded by multilateral institutions like the World Bank and European Investment Bank.

Category:Fences