Denis Stockton asked 16 hours ago
The electrical cord organizer is designed to hold all of the cables that you may need for it to. When a power feed cord is detachable from an RV, an L5-30P is usually used on the RV end of the cord. Also, it was formerly common to connect mobile homes to utility power via a 14-50 device. The appearance of this plug is sometimes confused with a NEMA 10 connector, rated for 240 V, but the NEMA TT-30 is a 120 V device. 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. The 6-50 is a smaller size receptacle lacking a neutral fourth prong, exclusively providing 240 V, also used for electric vehicle charging station purposes. Newer applications include electric vehicle charging. 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.
Locking connectors are designed so that different voltages and current ratings can not be accidentally intermated. One apparent disadvantage of twist-lock connectors is that in the event that the cable is accidentally pulled too hard, rather than the plug falling out of the receptacle, exposed conductors may come out of the plug, causing dangerous shorts or shock hazards if the circuit is live. Adapters are available with the TT-30P plug on one side and a 5-15R or 5-20R receptacle on the other side. How do you install one? The straight blades all carry one of the three phases. Since North American dryers and ranges have certain components (timers, lights, fans, etc.) that run on 120 V, this means that the neutral wire indirectly used for grounding would also carry current, even under non-fault conditions. A fuse needs to have a maximum current capacity that slightly exceeds the peak current flow in your system. What with this shifting of the zero and the very slight rise and fall in the current produced by rapid signalling, the ordinary land line instruments are quite unserviceable for work upon long cables. The hot and neutral blades are angled at 45° from vertical and 90° to each other, unlike NEMA 10 devices (where the angles are 30° and 60° respectively), also the plug is slightly smaller than a NEMA 10 and larger than ordinary 5-15P plugs.
Referring to the picture, the orientation is the same as the NEMA 5 plug and receptacle, with the neutral blade on the lower right. NEMA 13 series devices are three wire, three-pole, non-grounding devices for 3-phase, 600-volt equipment. NEMA 12 series devices are three wire, three-pole, non-grounding devices for 3-phase, 480-volt equipment. NEMA 11 series devices are three wire, three-pole, non-grounding devices for 3-phase 250-volt designs and equipment parts are specified by NEMA for 20-ampere (11-20), 30-ampere (11-30), and 50-ampere (11-50) devices. There are however NEMA L22 series locking devices for 20- and 30-ampere devices specified and available for these applications. NEMA 22 series devices are specified for three-pole plus neutral, what is electric cable five-wire grounding devices for 3-phase 277/480Y supplies. NEMA L1 series devices are single-pole plus neutral, two-wire, non-grounding devices for 125 volts single phase. According to NEMA, NEMA 23 straight-blade devices are “reserved for future configurations”, so no designs for this series exist and no devices have been manufactured. NEMA 20 series devices are specified for 347/600Y three-pole, four-wire, non-grounding devices. NEMA 23 series devices are specified for three-pole plus neutral, five-wire grounding devices for 3-phase 347/600Y supplies. NEMA 21 series devices are specified for three-pole plus neutral, five-wire grounding devices for 3-phase 120/208Y supplies.
The NEMA 14 connectors are essentially the replacements for the older NEMA 10 connectors described above, but with the addition of a dedicated grounding connection. NEMA 24 Series devices are specified for two pole, three-wire grounding devices for 347V A/C power. According to NEMA, NEMA 21 straight-blade devices are “reserved for future configurations”, so no designs for this series exist and no devices have been manufactured. According to NEMA, NEMA 22 straight-blade devices are “reserved for future configurations”, so no designs for this series exist and no devices have been manufactured. The ground pin is round, like those on straight-blade NEMA grounding devices. There are however NEMA L21 series locking devices for 20- and 30-ampere devices specified and available for these applications. There are however NEMA L23 series locking devices for 20- and 30-ampere devices specified and available for these applications. 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. Other types include special purpose connectors for boats, 400 Hz circuits such as used for aircraft, and direct-current applications. Gather bits of scrap wire from around you house or school workshop, collect short samples of different types.