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ABB 250 Series Fully Insulated Male Disconnect, Nylon
The ABB 250 Series Fully Insulated Male Disconnect is a vinyl/nylon fully insulated male terminal built for secure, code-compliant wire terminations. Molded from Nylon/Polyamide insulation in Blue for quick gauge identification, this disconnect is UL E9809 listed and is applied using the WT112M or CM2000A crimp tools. The 250 Series family covers a range of wire gauges, including 16-14 and 12-10 AWG configurations, making it a versatile choice for control panels, motor connections, and general electrical wiring.
Key Features
- Fully Insulated Design: Molded Nylon/Polyamide insulator combined with a metal insulation sleeve shields the connection point from accidental contact and abrasion.
- Internal Barrel Serrations: Serrated barrel interior improves grip on stranded or solid conductors for a more secure, lasting crimp.
- Funnel Entry: Flared wire entry point speeds up wire insertion and reduces installation errors in the field.
- Type: Vinyl Fully Insulated Male Disconnect terminal from the 250 Series disconnect family.
- Color: Blue insulation for fast visual gauge identification on the job site.
- Application Tools: Compatible with WT112M and CM2000A crimp tools for proper termination.
Certifications & Compliance
- UL E9809
Technical Specifications
- Refer to manufacturer documentation for complete technical specifications.
Typical Applications
- Commercial and Industrial Electrical Wiring
- Motor Control and Terminal Block Connections
- Panel and Control Box Wiring
- Renovation and New Construction Wiring Projects
- General Purpose Wire Terminations
Why ABB?
ABB's 250 Series disconnects pair a fully insulated Nylon/Polyamide molded body with internal barrel serrations and a funnel entry for a termination that is both protected and easy to install correctly the first time. Backed by a UL E9809 listing, this Blue male disconnect gives electricians a dependable, code-compliant option for wiring and control applications.
Manufacturer Resources
Product Specs
- Product Type:
- Disconnect
- Listing:
- UL Listed
- Series:
- 250 Series
- Product Material:
- Nylon
- Product Color:
- Blue
- Department:
- Electrical
- Product Group:
- Wiring Devices
- Product Subgroup:
- Lugs & Terminals
ABB TNF14-250MD-XV – Frequently Asked Questions
1) What crimp tool do I need for the ABB 250 Series fully insulated male disconnect?
The 250 Series male disconnect is applied with the WT112M or CM2000A crimp tool. Using a random pliers-style crimper on a fully insulated nylon terminal tends to split the insulator or under-compress the barrel, so plan on one of those two tools being on the truck before you start the panel.
2) Is this ABB male disconnect UL listed for commercial panel work?
It carries a UL listing under file E9809. That is the piece an inspector or a spec-driven MRO buyer usually wants in writing before insulated terminals go into a control panel or motor connection.
3) Do I order the male or the female disconnect for a motor lead connection?
The male is the tab half. You crimp it on one conductor and it mates with a female push-on receptacle on the other side, so a motor lead splice needs one of each, not two males. Order the ABB 250 Series male, model TNF14-250MD-XV, for the tab end.
4) What does the blue insulation on this ABB disconnect mean?
Blue is the wire-gauge color code on the 250 Series insulated terminals, and on this male disconnect the molded Nylon/Polyamide insulator is blue. In standard terminal color coding blue is the 16-14 AWG band, which is what the color is there to let an inspector or the next electrician read at a glance without pulling the terminal.
5) What is the difference between a fully insulated male disconnect and a plain male quick-disconnect tab?
On the ABB 250 Series male version, the tab and the crimp barrel are both shrouded by a molded nylon insulator plus a metal insulation sleeve, so the live connection point is guarded against accidental contact and against abrasion where wires move against a panel wall. An uninsulated tab leaves that metal exposed and needs a separate boot. If you are terminating inside a crowded control box where bundles rub, the fully insulated version is the one that survives.
6) Will this male disconnect hold on stranded wire, or do I need solid conductor?
Both work. The barrel is serrated on the inside, which bites into stranded conductors as well as solid for a crimp that holds up under vibration, and the wire entry is funneled so the strands feed in without fishhooking on the barrel lip.
7) Which ABB part number should I quote for the 250 Series blue nylon male disconnect?
The manufacturer part number is TNF14-250MD-XV, in the ABB 250 Series. That is the blue nylon fully insulated male disconnect; the 250 Series family also runs other gauge configurations including 12-10 AWG, so match the color band to the conductor you are terminating.
8) Is nylon or vinyl the better insulator for these ABB disconnects?
This one is nylon. The 250 Series is molded from Nylon/Polyamide, which is the tougher of the two against abrasion and mechanical scuffing, which is why it is the common choice in industrial panels and motor boxes rather than light general wiring. If your spec calls out nylon insulated terminals, this meets it on material.
How fast can I get the ABB TNF14-250MD-XV delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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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 ABB TNF14-250MD-XV come with a warranty?
Absolutely. The ABB TNF14-250MD-XV 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 ABB TNF14-250MD-XV?
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