AC Power Plugs and Sockets: British and Related Types > 자유게시판

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Secondary (rechargeable) batteries can be discharged and recharged multiple times using an applied electric current; the original composition of the electrodes can be restored by reverse current. Conversion plugs may be non-reusable (permanently closed) or reusable, in which case it must be impossible to open the conversion plug without using a tool. BS 1363, 13 A plugs socket-outlets adaptors and connection units is a British Standard which specifies the most common type of single-phase AC power plugs and sockets that are used in the United Kingdom. NEMA 10 connectors are a now deprecated type that had formerly been popular in the United States for use with high-power electric clothes dryers, kitchen ranges, and other high-power equipment. NEMA 7 devices are three wire/prong (hot-neutral-ground) connectors rated at 277 V. The 15 A 7-15 plug has the crowsfoot current carrying pins of the Type I plug, but with a U-shaped earth pin. This type of support is suitable for transmission both analog and digital. A 15 kV transmission line, approximately 175 km long, connected Lauffen on the Neckar and Frankfurt.

These cables are smooth two-wire cables, used for transmission in between an antenna & receiver such as a TV &radio. NEMA 24 Series devices are specified for two pole, three-wire grounding devices for 347V A/C power. NEMA 8 devices are specified for three wire, two-pole, grounding devices for 480 volts. NEMA 9 devices are specified for three wire, two-pole, grounding devices for 600 volts. NEMA 23 series devices are specified for three-pole plus neutral, five-wire grounding devices for 3-phase 347/600Y supplies. All NEMA 14 devices offer two hots, a neutral, and a ground, allowing for both 120 and 240 V when supplied by split-phase power, or 120 and 208 V if the supply is three-phase. 7-30 is a larger diameter connector, with an L-shaped neutral, while the 7-50 has an enlarged neutral pin, compared with the hot. NEMA 6 devices, while specified as 250 V, may be used for either 208 or 240 V circuits, generally depending on whether the building has a three-phase or split-phase power supply, respectively. These sockets and plugs are four prong (see receptacle chart above) grounding devices (hot-hot-neutral-ground) available in ratings from 15 to 60 A. The voltage rating is 250 V. Of the straight-blade NEMA 14 devices, only 14-50 and 14-30 are in common use and either may be used for home charging of electric vehicles.

The higher-current receptacles are rare, with twist-locking plugs such as L6-30 and direct wiring being more common. BS 8546 applies to travel adaptors having at least one plug or socket-outlet portion compatible with BS 1363 plugs and socket-outlets. The NEMA TT-30 (TT stands for Travel Trailer) connector is a 120 V 30 A recreational vehicle standard (hot-neutral-ground), also known as RV 30. The TT-30R receptacle is commonly available in nearly all RV parks in the United States and Canada, and all but the largest RVs manufactured since the 1970s use this plug to connect to power feeds. The 20 A plug has a blade rotated 90° (opposite blade from what would be the "line" blade on a 2-15 or 5-15 plug. The 14-50 has a rating of 50 A, and a straight neutral blade sized so that it does not mate with 14-30 connectors. NEMA 15 are three-pole and ground connectors (phase A, phase B, phase C, ground) rated for 208 V. Intended for delta three-phase circuits with ground and no neutral. NEMA 14-30R and -50R connectors have generally replaced NEMA 10 equipment for these applications. NEMA 13 series devices are three wire, three-pole, non-grounding devices for 3-phase, 600-volt equipment.

It was a very sophisticated machine, creating almost no wash because of a special arrangement of three propellers, but eventually the electric mule (see further) was preferred. If you take a small motor that you don't care about you can intentionally burn it out to see what happens to the windings. If you would like to know more about this topic, we can assist you. The 6-50 receptacle charges electric vehicles at the same 32- or 40-ampere maximum from charging stations, on a short cord, as the more versatile 14-50 with its fourth prong neutral not used currently for any electric vehicle charging purposes. A fuse rated for 1 A at 25 °C may conduct up to 10% or 20% more current at −40 °C and may open at 80% of its rated value at 100 °C. Modern practice is to require a separate safety grounding conductor whose only purpose is to divert unsafe voltages, and which does not carry significant current during normal operation. Although this is contrary to modern grounding practice, such "grandfathered" installations remain common in older homes in the United States.

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