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EXP INS VNYL RNG TERM, 12-10, No8
Manufacturer Resources
Product Specs
- Country Of Origin:
- United States (US)
- Product Subgroup:
- General Terminals
- Product Type:
- Vinyl Insulated Ring Terminal
- Standards:
- UL E9809
- Voltage Rating:
- 600 V
- Wire Size:
- 12-10 AWG
- Department:
- Electrical
- Product Group:
- Wire Termination
- Product Color:
- Yellow
- Product Material:
- Copper
Sta-Kon RC777-250 – Frequently Asked Questions
1) What wire gauge does the Sta-Kon RC777-250 ring terminal accept?
The Sta-Kon RC777-250 is sized for 12-10 AWG stranded copper wire. The yellow insulation is the standard color code for that 12-10 range, so on a panel where you also run 16-14 (blue) and 22-16 (red) terminals, the yellow barrel is your visual check that you grabbed the right crimp.
2) What stud or screw size does the RC777-250 ring fit?
The ring is sized for a No. 8 stud or screw. It will drop over a #8 terminal block screw or ground screw; it will not seat on a 1/4-20 stud, and on a smaller #6 screw the ring will float and can spin under the head.
3) Can I use this ring terminal on a 480V circuit?
No. The RC777-250 vinyl insulated ring terminal is rated 600 V, which covers 120/208, 240, 277 and 480 V building circuits. Anything above 600 V needs a different class of termination.
4) Is the Sta-Kon RC777-250 UL listed for use in inspected commercial work?
It carries UL file E9809. For an institutional or MRO spec that calls for listed wire connectors on 600 V branch circuits, that file number is the reference an inspector or submittal reviewer will want.
5) Should I use a ring terminal or a fork terminal on a terminal block?
Use the ring where the connection must not come loose. A ring like the RC777-250 is a closed barrel that captures the #8 screw, so vibration or a backed-off screw will not let the conductor escape. A fork or spade slides out sideways, which is faster for service work but is the wrong choice on motor terminals, control panels subject to vibration, or anywhere a captive connection is specified.
6) What is the RC777-250 terminal made of, and can I land aluminum wire on it?
The barrel is copper, so it is for copper conductors only. Terminating aluminum wire in a copper-only crimp barrel creates a dissimilar-metal joint; aluminum requires a connector marked AL or AL9CU.
7) Do I need a special crimper for the Sta-Kon RC777-250?
You need a crimp tool with a die for 12-10 AWG insulated terminals, which is typically the yellow-marked nest on a color-coded insulated terminal crimper. The nylon-jaw pliers or an uninsulated-terminal tool will crush the vinyl sleeve and give you an unreliable barrel. No tooling is supplied with the terminals.
8) Is the Sta-Kon RC777-250 made in the USA for Buy American jobs?
Country of origin is the United States. On federal, transit, or other domestic-preference work where electrical components have to be documented, that is the origin on record for this terminal.
9) Will the vinyl insulation on this ring terminal hold up in a hot equipment enclosure?
The sleeve is vinyl, which is the general-purpose insulation for 600 V building and control wiring and is what you want for ordinary panel, lighting, and appliance terminations. For high-heat locations near burners, heater elements, or engine manifolds, specify a nylon or heat-shrink insulated ring instead.
10) What is the exact part number to order this Sta-Kon ring terminal?
Order Sta-Kon RC777-250. That single part number covers the expanded-barrel vinyl insulated ring terminal for 12-10 AWG with a No. 8 ring, in yellow.
How fast can I get the Sta-Kon RC777-250 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Sta-Kon RC777-250 come with a warranty?
Absolutely. The Sta-Kon RC777-250 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Sta-Kon RC777-250?
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