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BS 1363 three-pin (rectangular) plugs and sockets. BS 1363 is a British Standard which specifies the common single-phase AC power plugs and sockets that are used in the United Kingdom. Distinctive characteristics of the system are shutters on the line and neutral socket holes, and a fuse in the plug.
The first US power plug and socket dated 1904. Several early American electrical plug and socket arrangements were invented by Harvey Hubbell. On 26 February 1903 he filed two patent applications featuring 2-pin plugs and adaptors for using his plugs with existing designs of lamp sockets and wall receptacles.
The IEC type J designation refers to SEV 1011's type 12 plugs and type 13 sockets. [54] Unique to Switzerland is a three-phase power socket compatible with single-phase plugs: [56] The type 15 plug has three round pins, of the same dimensions as type 12, plus two smaller flat rectangular pins for two additional power phases. The type 15 socket ...
Type n, non-sparking, Group 2 gases, Temperature class 3, special conditions apply Industrial electrical equipment for hazardous area has to conform to appropriate parts of standard: IEC-60079 for gas hazards, and IEC-61241 for dust hazards.
Group B connectors are also defined for the assistance of exporters to countries that use connectors based on British standards. The B 1 series defines the BS 546 3 pin unfused plugs of 2 A, 5 A (Type D), and 15 A (Type M), while the B 2 plug is the same as the BS 1363 (Type G) fused plug.
The CEE 7/5 socket and CEE 7/6 plug are defined in French standard NF C 61-314 "Plugs and socket-outlets for household and similar purposes" (which also includes CEE 7/7, 7/16 and 7/17 plugs) The socket has a predominantly circular recess which is 15 mm (0.591 in) deep with two symmetrical round apertures and a round 4.8 mm (0.189 in) earth pin ...
In any case, the concentration of T 3 in the human blood plasma is about one-fortieth that of T 4. The half-life of T 3 is about 2.5 days. [3] The half-life of T 4 is about 6.5 days. [4] T 3 levels start to rise 45 minutes after administration and peak at about 2.5 hours.
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