Our JJC insulation piercing connectors are engineered for reliable electrical connections in 10kV and 1kV applications. These professional-grade connectors feature a durable construction with weather-resistant glass fiber reinforced polymer housing and high-conductivity contact teeth available in tinned brass, copper, or aluminum.

The connectors offer simple installation - simply place the main wire and branch wire in position and tighten with insulated tools. The special bolt design maintains consistent pressure for superior electrical connection with minimal wire degradation, extending the service life of your insulated wires.

Key features include the sealed structure filled with insulating oil that enhances insulation intensity and safety. These versatile connectors are suitable for various applications including branch connections between copper/aluminum wires, unequal diameter wire connections, and direct connections between equal diameter wires.

Important notes: Only use with conductors meeting national standards. Installation must be performed by qualified professionals using proper insulated tools. These connectors are not reusable after dismantling.
The shipping was incredibly fast and efficient. Took less time than expected to arrive, which was a pleasant surprise. The packaging was secure and protected the items perfectly during transit. No issues with the delivery service at all; everything arrived on schedule and in excellent condition. The overall logistics experience was smooth and hassle-free, making the purchasing process very convenient. I appreciate the reliable and prompt service provided. Highly satisfied with how everything was handled from order to delivery. Will definitely consider ordering again in the future based on this positive experience. The efficiency in shipping really stands out and adds great value to the transaction. Thank you for such a seamless process.
The shipping was incredibly fast and efficient. My order arrived well ahead of the estimated delivery date, which was a very pleasant surprise. The packaging was secure and professional, ensuring all items were perfectly intact upon arrival. Regarding the product quality, the connectors feel exceptionally sturdy and well-made. The materials seem top-notch, exactly as described. Customer service was also outstanding; they were responsive and helpful with my pre-order questions. Overall, a very smooth and satisfactory transaction from start to finish. I would not hesitate to order from this supplier again for future projects. The entire experience was seamless and reliable.
Naturally, I was quite impressed with the overall experience. The logistics were handled exceptionally well; the package arrived much earlier than the initial estimated delivery window, which was a very pleasant surprise. Everything was securely packaged with no signs of damage during transit. Regarding quality, the connectors appear to be very robust and well-manufactured. The materials feel substantial, and the workmanship is precise, giving immediate confidence in their durability and performance for electrical applications. The service aspect was equally commendable. Communication was clear and prompt from the moment the order was placed. Any preliminary inquiries I had were answered thoroughly and without delay, making the entire process smooth and hassle-free. It’s clear that customer satisfaction is a priority. This combination of efficient shipping, apparent high-quality construction, and excellent support makes for a highly satisfactory purchasing experience that I would readily recommend to others in need of reliable electrical components.
Bought these connectors for a project and was thoroughly impressed. The delivery was incredibly fast, arriving well ahead of schedule, which was a huge relief. Packaging was secure and professional, with no signs of damage. The connectors themselves feel robust and well-made, with a solid construction that inspires confidence for electrical applications. Customer service was responsive and helpful when I had a pre-purchase question. Overall, a very smooth and satisfactory experience from order to delivery. Would definitely consider for future needs.
A fantastic experience from start to finish. The delivery was incredibly fast and efficient, arriving well ahead of the estimated schedule. The packaging was secure and professional, ensuring the products were in perfect condition upon arrival. Regarding quality, the connectors appear to be exceptionally well-made with robust materials and precise manufacturing. They feel solid and reliable, exactly what one would hope for in electrical components. The service provided was outstanding; communication was clear, prompt, and very helpful throughout the ordering process. Any inquiries were addressed immediately with thorough and courteous responses. Overall, this was a seamless transaction marked by superior logistics, impressive product quality, and exemplary customer service. Highly recommended for anyone seeking reliable electrical connectors.
Yikes, the delivery was incredibly fast! I was pleasantly surprised by the expedited shipping; it arrived well ahead of the estimated schedule. The packaging was secure and professional, ensuring all items were in perfect condition upon arrival. Regarding quality, the connectors appear to be exceptionally well-made, with a sturdy feel and precise construction that inspires confidence for electrical applications. The service provided was outstanding; the communication was clear and prompt, and any preliminary inquiries were handled with great efficiency and courtesy. Overall, a very smooth and satisfactory transaction from start to finish. The attention to detail in both the product presentation and customer interaction is highly commendable. This experience has certainly set a high standard, and I would not hesitate to place future orders or recommend this supplier to others based on this positive encounter. The combination of reliable logistics, apparent high-grade materials, and excellent support makes this a standout vendor in this product category.
Xavier Thompson here. Excellent experience overall. Shipping was exceptionally fast, arriving well ahead of the estimated schedule. The packaging was secure and professional, ensuring all components arrived in perfect condition without any damage. Regarding quality, the connectors appear to be very robust and well-manufactured. The materials feel substantial, and the piercing mechanism looks precise, which inspires confidence for their intended electrical application. Customer service was responsive and helpful during the ordering process, answering my preliminary questions promptly. A very smooth transaction from start to finish. Would certainly consider for future needs.
My order arrived much faster than anticipated. The shipping was incredibly efficient and well-tracked, providing updates at every stage. The packaging was secure and professional, ensuring the products were perfectly protected during transit. Regarding the quality, the connectors appear to be exceptionally well-made. The materials feel robust and durable, exactly as one would hope for electrical components. The finish is clean and precise, which speaks to good manufacturing standards. As for customer service, my inquiries were handled promptly and courteously. The communication was clear and helpful, making the entire purchasing process smooth and worry-free. Overall, a very positive experience from start to finish. I am thoroughly satisfied and would not hesitate to order again in the future. The combination of reliable logistics, apparent high quality, and excellent support makes this supplier a top choice.
Brisk delivery was a pleasant surprise; the package arrived earlier than expected. The build quality feels robust and durable, which is essential for electrical components. Customer service was responsive and helpful when I had a query about my order. Overall, a smooth and satisfactory experience from start to finish.
Outstanding experience with this purchase! The ordering process was smooth, and the delivery was incredibly fast, arriving well before the estimated date. The quality of the connectors appears excellent, with no visible defects upon inspection. Customer service was very responsive and helpful when I had a question about my order. Overall, a very positive transaction that I would highly recommend to others.