is this suitable for 10 gauge wire

Yes, it can work with 10 gauge wire. Cables Diameters: 4-8mm / 0.16-0.31".

What is the internal dimensions?

I dont have one in front of me, but i used them to splice underground low voltage lights. there was plenty of room to make the straight splice through on the set screw insulated terminals it comes with , then push the wires back out so all you are left with is straight wires and no slack. silicone both ends for added protection and it works great. Not sure how big your needing, but my guess would be i could see 14-uf max . Possibly 12-2 , but i would have to test one first.Hope it helps

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2pcs Waterproof Outdoor External 2 Way PG9 Electrical Junction Box Underground Cable Line Wires Power Cord Connector Protection

2pcs Waterproof Outdoor External 2 Way PG9 Electrical Junction Box Underground Cable Line Wires Power Cord Connector Protection

Product ID: 33548507

Details

Brand
LemonBest
Color
Black
Material
Plastic
Product Dimensions
1.6"D x 4.5"W
Style
Protection

💧IP65 Waterproof rating

🔌Supports 17.5A current & 450V voltage

🛠️Durable UV-resistant plastic

E£ 2239

Duties & taxes included

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Sold byAmazon EGYPTDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔒 Lock in your outdoor power with waterproof confidence!

BUILT TO LAST - UV-resistant, crack-proof plastic guarantees years of maintenance-free protection.
UNDERGROUND READY - Seamlessly bury it to protect cables from the elements and accidental damage.
WEATHERPROOF POWER HUB - IP65 rating ensures your connections stay dry and safe rain or shine.
DUAL ORIENTATION DESIGN - Install horizontally or vertically for ultimate flexibility in any outdoor setup.
HEAVY DUTY ELECTRICAL CAPACITY - Handles up to 17.5A and 450V, perfect for robust outdoor lighting and power needs.

The LemonBest 2pcs Waterproof Outdoor External 2 Way PG9 Electrical Junction Box offers IP65-rated protection for underground and external cable connections. Sized at 4.5" x 1.6" x 1.1", it supports up to 17.5A current and 450V voltage, made from durable UV-resistant plastic to prevent cracking and fading. Ideal for outdoor lamps and lantern wiring, it includes terminals, screws, and waterproof rings for easy, secure installation with a 2-year warranty.

Specifications

ASIN	B01IQTX9YK
Best Sellers Rank	#156,107 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #355 in Electrical Boxes
Brand Name	LemonBest
Color	Black
Customer Reviews	4.4 4.4 out of 5 stars (499)
Finish Type	Polished
Installation Type	Screw-In
Item Dimensions D x W x H	1.6"D x 4.5"W x 1.1"H
Item Weight	104 g
Manufacturer	LemonBest
Material	Plastic
Model Number	YBYX1356158VYT35134
Number of Items	2
Part Number	YBYX1356158VYT35134
Style	Protection
UPC	703546362532
Unit Count	2 Count
Warranty Description	2-year warranty

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