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Helunsi Waterproof IP68 External Junction Box, 2 Way Outdoor Junction Box, Underground Plug Line Coaxial Cable Connector Wire Range 5 to 15mm Electrical Power Cord Weatherproof Junction Boxes - Black

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Availability: In Stock.
Fulfilled by Amazon

Arrives Friday, Mar 13
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Color: Black-1pcs


Features

  • IP68 Waterproof >>> The Helunsi outdoor junction box is of IP68 high-level waterproof class, weatherproof, moisture-proof, dust-proof and anti-UV, making it safe to use in the sun, wet environment, rainy or snowy days, provides total protection for your junction cables.
  • High-Quality Materials >>> 2 way junction box has good waterproof performance, with high quality plastic PC housing and waterproof silicone seal, which will not crack or fade in harsh environment, corrosion and high temperature resistant, durable for years use.
  • Specification >>> Pack of 1. Internal dimensions: L 2.83 x W 1.89 x H 1.26inch. External dimensions: L 5.31 x W 2.72 x H 1.38inch. One input and one output, conduit cable gland is equipped with 3 sets of silicone seals of different thicknesses, applicable cable size range: imperial units 3/16" to 11/32", 11/32" to 15/32", 15/32" to 19/32" (Metric units 5-9mm/9-12mm/12-15mm). Comes with 3 screw terminal connector and mounting kit. Maximum voltage: AC 450V. Maximum current: 24A.
  • Easy to Install >>> It can be installed under the ground or on the wall, horizontally or vertically as indoor or outdoor junction box, tightening the exterior screws with a screwdriver for a complete seal. Design for detachable box and cover, the waterproof silicone layer is precise and tight, by rotating and tightening the cable gland nut at both ends can lock and seal the cable.
  • Wide Usage >>> Our Helunsi junction box can protect the connections of outdoor electrical appliances and wiring, which is suitable for external lighting facilities requiring waterproof or weatherproof protection, street lights, irrigation machine, solar equipment, outdoor LED display, garden lights, outdoor flood lights, landscape lights, underground electrical and more.

Features

  • High-Quality Materials >>> The Helunsi junction box can easily be installed under the ground. Made of high quality plastic housing, it will not crack or fade in sunlight, durable for years of use, corrosion resistant, high temperature resistant, long-life.
  • Waterproof >>> IP68 high waterproof level / Moisture-proof / Dust-proof / Anti-UV, 2 way plastic terminal, it can be installed horizontally and vertically as external junction box, widely used in external lighting facilities requiring waterproof or weatherproof protection, street lights, buried lights, garden lights, outdoor flood lights, etc.
  • Specification >>> One in and one out and is delivered with a three-position terminal block. Terminal Block Current: 24A; Terminal Block Voltage: AC 450V. Supported wire diameter: imperial units 3/16" to 11/32", 11/32" to 15/32", 15/32" to 19/32" (Metric units 5~9mm/9~12mm/12~15mm)
  • Easy To Install >>> The joint shell mold is integrally formed with a waterproof layer, the rotaters at each end close up the rubber around the ends of the cable. It is used to install outdoor lamps and lanterns connection, wiring is easy to operate, more convenient and safer.
  • Wide Usability & After Sales >>> The Helunsi junction boxes are suitable for kinds of LED billboards, LED tunnel lights, LED Road landscape lighting, LED outdoor display, LED garden lights. Our product is backed by 1-year unconditional warranty. Please feel free to contact our customer service at any time if you have any product issue or question, we will reply you within 24 hours.

Description

Helunsi 2 Way Junction Box IP68 Waterproof, it can be installed horizontal and vertical as external junction box to makes the connection more convenient, no tools required, no welding required, only need to connect the same type of wire together, no cable cutting, more convenient and safer. Junction Box Good for the place where to need waterproof joint,such as: LED equipment, grating, external wiring, factory automation control, wireless bridge and so on. Made of high quality plastic, it will not crack or fade in sunlight, persistence and durableness. Product Specifcations Material: Plastic Color: Black Junction Box: 2 Way Junction Box Rated voltage: 450V Rated current: 24A Waterproof level : IP68 Available Wire Diameter : imperial units 3/16" to 11/32", 11/32" to 15/32", 15/32" to 19/32" (Metric units 5~9mm/9~12mm/12~15mm) Package Content 1 x Waterproof Junction Box 1 x Screwdriver Note: Please allow minor errors due to manual measurement. Thanks for your understanding. Monitors are not calibrated same, item colour displayed in photos may be showing slightly different from the real object. Please take the real one as standard. After Sales Our product is backed by 1-year unconditional warranty. Please feel free to contact our customer service at any time if you have any product issue or question, we will reply you within 24 hours.


Material: Plastic, Rubber


Brand: Helunsi


Color: Black-1pcs


Style: Compact


Finish Type: Corrosion Resistant


Package Dimensions ‏ : ‎ 5.39 x 3.19 x 1.93 inches; 5.29 Ounces


Item model number ‏ : ‎ AST003


Date First Available ‏ : ‎ June 20, 2019


Manufacturer ‏ : ‎ Helunsi


Best Sellers Rank: #31,746 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #56 in Electrical Boxes


#56 in Electrical Boxes:


Customer Reviews: 4.4 4.4 out of 5 stars 628 ratings


Material: Plastic


Brand: Helunsi


Color: Black-1pcs


Style: waterproof ip68 external junction box


Product Dimensions: 5.31"D x 2.72"W x 1.38"H


Product Dimensions ‏ : ‎ 5.31 x 2.72 x 1.38 inches; 5.29 ounces


Item model number ‏ : ‎ outdoor junction box


Date First Available ‏ : ‎ June 20, 2019


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Mar 13

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Waterproof IP68 External Junction Box
Color: Black-1pcs
This Waterproof IP68 External Junction Box (2-way, for 5-15mm cables, black) worked perfectly for me to fix a poorly made audio cable connection. It completely solved my problem with the pool audio. Pros: * IP68 Waterproofing: Absolutely essential for outdoor use and in damp environments like by the pool. It ensures the connections are protected from water and dust, which is crucial for both durability and safety. * Ease of Use: Installation was simple and straightforward. I was easily able to house the problematic audio connection inside the box, ensuring a secure isolation. * Effective Problem Solver: The box delivered exactly what it promised, effectively resolving the audio interruption I was experiencing due to an exposed and poorly made connection. My pool audio is now working flawlessly. * Robust Construction: The box appears to be made from a strong and durable material, which inspires confidence in its longevity, even under adverse weather conditions. * Versatility: The wire range (5 to 15mm) is quite flexible, allowing for use with a variety of cables, which is a plus for different applications. Conclusion: For anyone looking for an effective and durable solution to protect electrical or audio connections in outdoor environments, especially in damp or weather-exposed locations, the IP68 Waterproof External Junction Box is an excellent choice. In my case, it completely resolved my pool audio issue, and I highly recommend it. ... show more
Reviewed in the United States on July 20, 2025 by Amazon Customer Amazon Customer

  • good quality box
Color: Black-1pcs
works very well my husband accidentally cut a Y electrical connector for garden lights, we look for a Y connector replacement but we couldn’t find any. this helped to fix the connector, its water proof very solid we below it’s going to last long time
Reviewed in the United States on September 15, 2025 by Matu

  • Great Product with Cheap Screws
Color: Black-2pcs
I needed a waterproof junction box to use in conjunction with a sprinkler control line repair. The junction box was perfect for my needs. I was impressed with the seals and overall quality of the junction box until I came to screwing the lid on the box. The manufacturer included the cheapest screws I've ever seen. One of the screws lacked slots in the head and was useless! My recommendation to the manufacturer is to get rid of the cheap screwdriver included and spend the money on higher-quality screws. ... show more
Reviewed in the United States on August 18, 2023 by Michael G Jordan

  • It works!
Color: Black-1pcs
Easy to install, came with everything I needed and more. I used this as extra protection for some low voltage wire I had to extend for my automatic gate. It took 10 minutes total to install including disconnecting the existing wiring and reconnecting it inside the box. It honestly was a bit big for what I needed it for, but it gets the job done. The included screws worked with no issue. ... show more
Reviewed in the United States on October 19, 2025 by Amazon Customer

  • Pool light splice
Color: Black-1pcs
Used this to replace my pool light without pulling a new cable so it will be submerged forever. I soldered the connections and then filled the box with a pourable silicone. Normally you have to pull the old cable (mine is 100ft) out but after 20 years it is almost impossible to break it loose and pull the new one through. The best price I found was $250 for the labor. Way easier and cheaper to use this j-box but if it fails it'll ruin a $500 light. Works great so far but just installed April 2024. I'll update this if there is any problem. ... show more
Reviewed in the United States on April 15, 2024 by Average Bear

  • Too small
Color: Black-1pcs
I couldn't find the sizes in the product description so I went by customer feedback. When I received the unit, it was way to small. I took measurements. Then I realized you can barely read the dimensions on the top in the picture. The outside dimensions are 5 1/4 " length X 2 3/4 " width. The length is measuring form the end of the cable screw to the other cable screw. The box itself outside dimensions are 3 " x 2 3/4 ". The inside dimensions (useful space) are 1 3/4 " x 2 5/8 ". I need interior space of 4.5 x 3.5. The unit itself looks okay - I returned it - but I didn't test for waterproof. The enclosed screw drive is standard, whereas the screws are phillips head. The screw take some effort to get in straight. The screw heads are not high quality and started deforming the first time I installed them. If these are going to be installed and forgotten, the screws are sufficient. If you are going to repeatedly open / close, you will need to get new screws. ... show more
Reviewed in the United States on November 7, 2020 by DrB DIY

  • Good solution!
Color: Black-2pcs
Used it connect underground lamp post wire. Easy to use! Seems well built.
Reviewed in the United States on October 9, 2025 by nkohlmann

  • Excellent junction box!
Color: Black-2pcs
Excellent junction box - very easy to install and it's held up nicely to the weather (rain and snow here in Wisconsin)
Reviewed in the United States on November 29, 2025 by restorick

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