The AC WORKS® AS-SS250R is a four-prong NEMA SS2-50R locking female connector assembly rated up to 50 amps at both 125 and 250 volts. It is designed with a weather-tight seal and built-in strain relief, and it is commonly used for RV power, shore power, emergency power, and industrial power.
For a matching connection, the AS-SS250R pairs with a NEMA SS2-50P plug, also known as CS6365. It can also connect to inlet boxes that use the same SS2-50 connection.
What Is the AC WORKS® AS-SS250R?
The AS-SS250R is the female side of a four-wire locking power connection. Its locking format helps keep the connection engaged, while the weather-tight seal and strain-relief structure support the cable at the connector body.
Key details from the product overview include:
- Four-prong locking female connector assembly
- Rated up to 50 amps at 125/250 volts
- Weather-tight seal
- Built-in strain relief
- Compatibility with SJSO - and ST- type cable jackets
- Connection with NEMA SS2-50P plugs, also known as CS6365
Cable Compatibility and Conductor Sizes
The product overview identifies 6/4 cable as the size most often used with the AS-SS250R. It also notes that 10/4 and 8/4 cable can be used. In this notation, the first number refers to conductor gauge and the second indicates four conductors.
Cable selection and connector assembly must match the intended circuit and installation. Follow the wiring-device instructions supplied with the connector. If you are not qualified to confirm conductor size, terminations, grounding, strain relief, or code requirements, use a licensed electrician.
Matching Plugs and Inlet Boxes
The AS-SS250R mates with a NEMA SS2-50P locking male plug. That plug is also identified as CS6365. The connector is inserted into the compatible plug and turned into the locked position.
The same connector can be used with inlet boxes that have the matching SS2-50 connection. Before making a connection, confirm that the connector, plug or inlet, cable, and power source are all compatible and de-energized.
See the AC WORKS® AS-SS250R product page for the connector, or explore SS2-50 outlet solutions for compatible power-connection formats.
Common AS-SS250R Applications
The AS-SS250R is most often used where a secure four-wire locking connection is needed. The product overview highlights four application areas:
- RV power
- Shore power
- Emergency power
- Industrial power
In each case, the connector is only one part of the power path. The mating plug or inlet, cable, source, and connected equipment must be suitable for the application.
Safe Setup Checklist
Use this checklist before installing or connecting the AS-SS250R:
- Confirm the mating connection is NEMA SS2-50P or CS6365, or a matching SS2-50 inlet.
- Confirm the cable type and conductor size are appropriate for the intended circuit.
- Inspect the connector body, weather seal, locking surfaces, and strain relief before use.
- Keep the circuit de-energized while assembling or inspecting the connection.
- Lock the connection fully before use and do not exceed the rating of any component in the power path.
- Ask a licensed electrician to handle installation or troubleshooting when electrical qualifications are required.
Frequently Asked Questions
What is the AS-SS250R?
It is a four-prong NEMA SS2-50R locking female connector assembly from AC WORKS®, rated up to 50 amps at 125/250 volts.
What plug connects to the AS-SS250R?
The AS-SS250R connects to a NEMA SS2-50P male plug, also known as CS6365. It also works with inlet boxes that use the same connection.
What cable sizes are mentioned for the AS-SS250R?
The product overview says 6/4 cable is used most often. It also lists 10/4 and 8/4 cable as compatible options.
Where is the AS-SS250R commonly used?
Common uses include RV power, shore power, emergency power, and industrial power.
When should a licensed electrician be involved?
Use a licensed electrician whenever you are not qualified to confirm conductor sizing, wiring terminations, grounding, strain relief, source compatibility, or local electrical-code requirements.
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CS6365 50 Amp Locking Plug: Uses, Compatibility, and Safe Connection Guide