are there shorting bars for these things?

Depends on what you mean by shorting bars?

For anyone who has secured the terminal strip to a surface, what size/length of fastener did you use?

You can use #4 3/4 inch screws.

Will these work w fat 12 AWG stranded wire for 12v outdoor lighting, or is this only for smaller wire?

No. The largest wire this will take is 14A. 12Ga wire is 3+mm, this is 2.5mm. Of course with stranded you could always over twist or cut a few strands of to jam it in. I wouldn’t recommend it. The other issue is these are rated for 10a. If you are using 12ga wire near capacity you could melt them. And finally, out-door means corrosion is an issue. I would suggest an automotive or wet/damp rated block instead of these. I use these successfully for a dry location outdoor block for sprinkler valves. After a few years I throw them away and replace because they corrode and don’t loosen any more.

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Weewooday 20 Pieces Terminal Strips Electrical Block Set 12-position Dual Row White Screw Terminal Strip 10 a 380 V Wire Connector Electrical Barrier Block for Small Projects Home

Product ID: 311235140

Details

Current Rating
10 Amps
Connector Type
Screw
Number Of Contacts
12
Mounting Type
Panel Mount
Material
Copper
Brand
Weewooday

⚡Supports 10A current at 380V for reliable power

🔥Flame-retardant PP shell withstands -40°C to 150°C

🔧12-position dual row with easy screw terminal installation

19558CFA

Duties & taxes included

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Connect with Confidence — Power Your Projects Like a Pro!

SAFE RELIABLE - Secure wire contact prevents accidental shorts and ensures stable electrical connections every time.
EFFORTLESS SETUP - No welding needed—just strip, insert, and tighten screws for a secure connection in seconds.
FIREPROOF DURABLE - Flame-retardant, corrosion-resistant shell ensures safety and longevity under extreme conditions.
POWERFUL PERFORMANCE - Handles up to 10 amps and 380 volts, perfect for demanding home and small project electrical needs.
CUSTOMIZABLE VERSATILE - Easily cut and adapt terminal strips to fit any project size or configuration.

The Weewooday 20-piece terminal strip set features 12-position dual-row screw terminals made from flame-retardant PP and copper materials. Rated for 10 amps and 380 volts, these insulated blocks offer corrosion resistance, easy installation without welding, and customizable sizing—ideal for home electrical projects and small-scale industrial use.

Specifications

ASIN	B08V4W637Q
Best Sellers Rank	#13,782 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #18 in Terminal Blocks
Brand Name	Weewooday
Color	white
Connector Type	Screw
Current Rating	10 Amps
Customer Reviews	4.6 out of 5 stars 746 Reviews
Item Dimensions W x H	7.87"W x 0.59"H
Manufacturer	Weewooday
Material	Copper
Material Type	Copper
Model	Weewooday-13102
Mounting Type	Panel Mount
Number Of Contacts	12
Number Of Poles	12
Number of Positions	12
Part Number	Weewooday-13102
Unit Count	20.0 Count
Upper Temperature Rating	150 Degrees Celsius
Voltage	380 Volts

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