Search  for anything...

Helunsi Waterproof Junction Box 3 Way, IP68 External Waterproof Electrical Junction Box, Black Underground Junction Box Outdoor Cable Connector, for Diameter 5mm -14mm Wire Gland (1 Pack - Larger)

  • Based on 326 reviews
Condition: New
Checking for the best price...
$11.99 Why this price?
Save $28.00 was $39.99

Buy Now, Pay Later


As low as $2 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE refund/replacement until Jan 31, 2026

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Tuesday, Mar 10
Order within 16 hours and 18 minutes
Available payment plans shown during checkout

Protection Plan Protect Your Purchase
Checking for protection plans...

Size: Larger


Color: Black-1 Pack


Features

  • IP68 Waterproof: The Helunsi outdoor junction box is of IP68 high-level waterproof class, weatherproof, moisture-proof, dust-proof and anti-UV. It lasts longer in wet environments, won't break, and provides total protection for your junction cables.
  • Premium Material: New upgrade larger waterproof junction box connector, 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: 3 way junction box. Pack of 1. See the third picture for detailed internal and external dimensions. Conduit cable gland is equipped with 3 sets of silicone seals of different thicknesses, which is one input and two output that applicable cable size range: imperial units 5/32" to 5/16", 5/16" to 15/32", 15/32" to 9/16" (Metric units 4-8mm/8-12mm/12-14mm). Comes with 5 wire quick connectors and mounting kit. Maximum voltage: AC 450V. Maximum current: 24A.
  • Easy to Use: 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 display, garden lights, outdoor flood lights, landscape lights, underground electrical and more.

Features

  • IP68 WaterproofThe Helunsi outdoor junction box is of IP68 high-level waterproof class, weatherproof, moisture-proof, dust-proof and anti-UV. 3 Way Plastic Terminal, it can be installed horizontally and vertically as an external junction box.
  • Premium Material New upgrade larger waterproof junction box connector, made of premium plastic enclosure, it will not crack or fade in sunlight, corrosion and high temperature resistant, durable for years use.
  • Specification M25 connector, 3 wire(3-pole), Cable suze range: imperial units 5/32" to 5/16", 5/16" to 15/32", 15/32" to 9/16" (Metric units 4-8mm/8-12mm/12-14mm). One input and two output, delivered with a five-position terminal block. Terminal Block Current: 24A; Terminal Block Voltage: AC 450V, PC housing.
  • Easy Mounting Can be installed under the ground or on the wall, horizontally or vertically as indoor or outdoor junction box. The joint shell mold is integrally formed with a waterproof layer. Rotator caps at each end can close up the rubber around the ends of the cable.
  • Wide UsageOur Helunsi junction box can protect the connections of outdoor lamps/ lanterns and provide easy access to them, suitable for external lighting facilities requiring waterproof or weatherproof protection, street lights, buried lights, garden lights, outdoor flood lights, etc.

Description

☀Helunsi 3 Way Junction Box☀ IP68 protection rating level, it can be installed horizontally or vertically as external junction box to makes the connection more convenient, no tools required, no welding or cable cutting required, just connect the same type of wire together, more convenient and safer. This junction box is ideal for protecting the connections of outside power sources, such as LED equipment, grating, external wiring, factory automation control, wireless bridge and so on. ☀Product Specification☀ ●Junction Box:3 Way Junction Box ●Material: Plastic ●Color:Black ●Rated voltage: 450V ●Rated current: 24A ●Waterproof level : IP68 ●Available Wire Diameter : imperial units: 5/32" to 5/16", 5/16" to 15/32", 15/32" to 9/16" Metric units: 4-8mm/8-12mm/12-14mm ☀Package Including:☀ 1 x Waterproof Junction Box 1 x Screwdriver ☀Tips☀ Please disconnect the power supply before installation. 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. ☀After Sales☀ Our products are backed by our 1-year unlimited warranty, feel free to contact our customer service at any time if you have any product issue or question, we will try to make you satisfied.


Material: Plastic, Rubber


Brand: Helunsi


Color: Black-1 Pack


Style: Square


Item Dimensions LxWxH: 4.96 x 3.54 x 1.81 inches


Product Dimensions ‏ : ‎ 4.96 x 3.54 x 1.81 inches; 7.2 Ounces


Date First Available ‏ : ‎ October 24, 2019


Manufacturer ‏ : ‎ Helunsi


Country of Origin ‏ : ‎ China


Best Sellers Rank: #90,339 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #113 in Electrical Boxes


#113 in Electrical Boxes:


Customer Reviews: 4.6 4.6 out of 5 stars 266 ratings


Material: Plastic


Brand: Helunsi


Color: Black-1 Pack


Style: 3 way waterproof junction box


Finish Type: Hard PP plastic


Product Dimensions ‏ : ‎ 4.96 x 3.54 x 1.81 inches; 7.2 ounces


Item model number ‏ : ‎ AOS001


Date First Available ‏ : ‎ October 24, 2019


Manufacturer ‏ : ‎ Helunsi


Best Sellers Rank: #98,622 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #207 in Electrical Boxes


#207 in Electrical Boxes:


Customer Reviews: 4.6 4.6 out of 5 stars 326 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Mar 10

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Nicely made
Size: Larger Color: Black-2 Pack
Out of the box this seems like a well-designed and well-made item. The set comes with two sizes of compressible grommets to handle different wire size. Haven't installed these yet but noticed that the smallest port gasket compresses down to much smaller than a 1/4" OD wire jacket so should be watertight for a range of (at least round) wires. The cover gasket fits well and it looks like the assembly screws will work well. The internal wire junction unfair but looks like each conductor snaps down like modern outlet wire captures. ... show more
Reviewed in the United States on June 20, 2022 by ranchhand

  • Great for junction but might not work for splicing
Size: Larger Color: Black-1 Pack
I assumed that the connector would be a line voltage in with two taps but it wasn't. i needed to make a splice so my wires were just to short to bend around inside the box to make the connects. Seems like a good product for the right application through.
Reviewed in the United States on July 13, 2021 by DBJ

  • Compact Solution for small number terminations.
Size: Small Color: Black-2 Pack
Application J box needed for 12 V DC on ATV and UTV, aftermarket external lights. “Compact solution” that will provide isolation from water and dirt. Mounting brackets molded into housing makes for easy install, screwed or zip tie mounting. Terminal block is loose with no securing system, EZ fix with RTV. Three sizes of cable glands and gasketed enclosure lid, splash proof but not sure I would say waterproof. Makes for clean install. ... show more
Reviewed in the United States on December 18, 2020 by Richard E.

  • feels rugged
Size: Larger Color: Black-1 Pack
while the included terminal board doesn't mount to anything inside the box, it was a nice inclusion to limit the use of wire nuts. the different sized grommets are sufficient for most wire sizes. Only giving 4 stars as I haven't tested it's water resistance ability.
Reviewed in the United States on October 7, 2020 by Richard Banks

  • Came on time, and just as described.
Size: Small Color: Black-2 Pack
It does what I expected. I don't know what else to say, it appears to be well made. But I don't know durability or sturdiness yet. Works great so far.
Reviewed in the United States on November 3, 2021 by Mel B

  • Connector port was faulty
Size: Larger Color: Black-1 Pack
After searching for a durable outdoor 3 way junction box to install outdoor flood lighting, I can honestly say this did not do the job. The wiring continually comes loose, and I find myself constantly having to open up the box to reconnect. The box itself is waterproof, however the internal connection housing is lacking and flimsy. ... show more
Reviewed in the United States on September 23, 2023 by Ron R.

  • Great product, easy to install and fast service
Size: Small Color: Black-2 Pack
Great product, easy to install and fast service. These made our upgrade and install simple and fast
Reviewed in the United States on April 28, 2022 by Padre

  • Nice product - as advertised
Size: Larger Color: Black-2 Pack
Looks like a good value. There is no provision for the mounting the terminal strip provided with the box. Also, an instruction sheet for the terminal strip would have been nice - the connections are not particularly intuitive. My application did not use the provided terminal strip, so no real negative effect. ... show more
Reviewed in the United States on July 21, 2020 by NW-John

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...