

⚡ Seal it fast, seal it safe — the pro’s choice for open splice repairs!
The Rack-A-Tiers Open Splice Junction Box (JB400) is a UL-listed, fire-resistant polymer enclosure designed to safely and quickly cover open electrical splices. With a spacious 25.8 cubic inch capacity and a patented one-piece hinged design, it eliminates the need for rewiring, enabling a 5-second installation that meets U.S. and Canadian safety codes. Ideal for electricians and DIY pros seeking a durable, code-compliant, and labor-saving solution.
| ASIN | B0C765NZB2 |
| Best Sellers Rank | #25,083 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #55 in Electrical Boxes |
| Brand | Rack-A-Tiers |
| Capacity | 25.8 Cubic Inches |
| Date First Available | June 5, 2023 |
| Finish Type | Powder Coated |
| Installation Type | Screw-In |
| Item Weight | 3.52 ounces |
| Item model number | JB400P |
| Manufacturer | Rack-a-tiers |
| Material | fire-resistant polymer |
| Product Dimensions | 2"D x 5"W x 5"H |
| Specification Met | Csa |
| Style | Safety |
| UPC | 625912324008 |
A**K
Exactly what we needed
I needed this for a specific project and it worked out perfectly. The material feels really durable and well-made — not flimsy at all like some others I’ve tried in the past. The measurements were spot on, and it held up beautifully through installation. It was easy to install. Just make sure you double-check that this is the right size and type for your project, and you’ll be totally satisfied. Great value and excellent quality — I’d definitely order again if I need more.
R**E
Easy to use
Quality product- So easy to use, helped make it so I didn’t have to pull all wires out and start over- Worth every penny in labor saving costs…
B**B
Great idea!
This was so easy to use, perfect size, I didn’t want to undo the wires, but they needed to be in a box, this works great. Looks nice and clean, it’s solid box. Great idea!
A**R
Good product!
A little on the pricier side but worked great for the one I needed! Loved the versatility
N**3
No more open wires
Wash to set up with 2 choice of side opening on each side, 4 total. Did not have to disconnect wires and installed the holder with bigger screws than provided.
A**M
Perfect solution
Install went great, product is excellent fit & solution for the job. Thoughtfully designed & well made, and made in USA! Price point could be better & hopefully over time price will come down, but for now it was worth it to fix the one open splice area with some access difficulty & quickly. I could part with a few extra dollars to create a safer & compliant situation to put my mind ease. Also, a really well made box & the hexagonal design is excellent to fix many situations, may consider for future use as junction box in another area.
R**O
Great product
Great profuct
A**R
Easy-to-use/Time Saver
This product is the best invention since the Edison light bulb. Splicing electric wires in a Hot 🔥 uncomfortable Attic is no longer a problem. The Rack-A-Tiers Open splice box is a fast , Easy and cost effective way to get the Job done . To all the the fellow electrician out there you have to try this product . Here are a few reasons why. This product is durable and meets all UL listing . The best feature about the splice box is you don't have pull the old wire apart and kill the circuit wasting valuable time. Just install the box around open splice attach the box to the proper support (screws included) push the lid down and the job is Done ✔️. I give this product a 5 star .
E**O
I discovered unboxed splice wire in the basement. Didn’t want to unscrew the wire nuts and rethread everything into a box. This just made the job so much easier. I chose this box for its hexagon shape because the wires were coming in at different angles, this box worked perfectly for that. Made the job quick and easy. Lots of nailing options as well
N**E
Very easy to use for a casual DIYer.
D**N
Excellent delivery time. Item is a bit bulky but did the job perfectly. A consideration would be to have different sizes of boxes where some are flater, less bulky. Otherwise an excellent solution to my problem. Would recommend it and would buy again.
M**R
Sturdy and great concept loved this for doing some Reno’s in the attic adding lights to rooms that had none. Very simple to use and effective
T**Y
Super easy and no need to detach wires. Took away one star because it's expensive for one plastic box.
Trustpilot
2 weeks ago
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