Will these work with 12gauge wire. I have the older version and 12 gauge wire will not fit in slot

It is a tight fit but as long as the sharp probe penetrates the 12 gauge wire, it should work. It worked on my 12 gauge.

Are these waterproof?

they are not water proof. I use them in 12v outdoor lighting connections and they are under mulch.

Will this work with solid awg 20 light cord to awg 16?

I think that transitioning from any solid core wiring would be problematic. I believe this connector is designed for use with stranded core wire, where the individual strands are “mushed” together to form an electrical connection. Might be worthwhile to buy a small pack and see whether you can make it work.

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SUNVIE Fastlock2 Low Voltage Wire Connector, Waterproof, 12-18 Gauge, 24PCS

SUNVIE Fastlock2 Low Voltage Wire Connector, Waterproof, 12-18 Gauge, 24PCS

Product ID: 473138615

Details

Color
Black
Connector Type
Screw
Contact Material
Nickel Brass
Insulation Material
Plastic
Terminal
Screw Terminal

⚡12-18 AWG compatibility

💧Waterproof & corrosion resistant

🔩3-piece screw terminal design

€ 86.04

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Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💡 Connect Fast, Shine Longer: The Ultimate Low Voltage Wire Connector for Outdoor Pros

UNIVERSAL LOW VOLTAGE FIT - Seamlessly supports 12-18 gauge wires, perfect for all your outdoor lighting needs.
COMPACT 24 PACK POWERHOUSE - Enough connectors to light up 24 fixtures—upgrade your outdoor ambiance without running out.
BUILT TO BRAVE THE ELEMENTS - Ultra-strong nylon & fiberglass body with nickel-plated brass pins for long-lasting corrosion resistance.
CONFIDENCE WITH LIFETIME SUPPORT - Backed by a 5-year replacement warranty and lifetime customer care—install worry-free.
EFFORTLESS CONNECTIONS IN SECONDS - No crimping, cutting, or splicing—connect your landscape lights in under 2 minutes.

The SUNVIE Fastlock2 is a premium 24-pack of waterproof, low voltage wire connectors designed for 12-18 gauge landscape lighting wires. Featuring a patented 3-piece screw terminal design, these connectors eliminate the need for crimping or splicing, enabling quick and reliable outdoor light installations. Constructed from corrosion-resistant nylon, fiberglass, and nickel-plated brass, they ensure durable, weatherproof connections backed by a lifetime warranty and exceptional customer support.

Specifications

ASIN	B0B9M2N9GN
Best Sellers Rank	#7,904 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #38 in Outdoor Patio Lighting Accessories
Brand Name	SUNVIE
Color	Black
Connector Type	Screw
Contact Material	Nickel, Brass
Customer Reviews	4.4 4.4 out of 5 stars (1,835)
Insulation Material Type	Plastic
Item Dimensions L x W x H	1.07"L x 0.49"W x 1.58"H
Item Highlight	Landscape Lighting Connectors Low Voltage Connectors for Low Voltage Landscape Lights Outdoor Landscape Path Lights
Item Weight	13.44 ounces
Manufacturer	SUNVIE
Material Type	Brass, Plastic
Model	LVCO0224
Number of Items	24
Number of Packs	24
Terminal	Screw Terminal
Unit Count	24 Count
Warranty Description	Lifetime

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