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Tamper-resistant GFCI duplex receptacle type 5-20RA, which can take 5-15 and 5-20 grounding plugs and 1-15 non-grounding plugs These versions of the 5-15R or 5-20R receptacle are residual-current devices , and have "Test" and "Reset" buttons (and sometimes an indicator light which may be normally on or normally off per the vendor's design).
Tamper-resistant sockets may be required in new residential construction, with shutters on the power blade sockets to prevent contact by objects inserted into the socket. [ 48 ] In stage lighting , this connector is sometimes known as PBG for Parallel Blade with Ground , Edison or Hubbell , the name of a common manufacturer.
"Industrial-grade" connectors are constructed to meet or exceed the requirements of more stringent industry testing standards, and are more heavily built to withstand damage than residential and light commercial connectors of the same type. [21] Industrial devices may also be constructed to be dust or water-tight.
IEC 60309 (formerly IEC 309 and CEE 17, also published by CENELEC as EN 60309) is a series of international standards from the International Electrotechnical Commission (IEC) for "plugs, socket-outlets and couplers for industrial purposes".
Lighting and general purpose receptacles are at 120 volts AC, with larger devices fed by three wire single-phase circuits at 240 volts. In commercial construction, three-phase circuits are often used. Common 3 phase configurations within a building are 208v/120 wye, 120/240 center tapped delta and 480v/277v wye.
Image source: Getty Images. 1. Understand how your claiming age affects your benefits. The government bases your Social Security benefits on your income during your working years and your age at ...
Guatemala said it is open to engaging in a "constructive and respectful dialogue" with the new administration of incoming U.S. President Donald Trump, though no agreement has been made on ...
Tamperproofing is a methodology used to hinder, deter or detect unauthorised access to a device or circumvention of a security system. Since any device or system can be foiled by a person with sufficient knowledge, equipment, and time, the term "tamperproof" is a misnomer unless some limitations on the tampering party's resources is explicit or assumed.