Question 1

Do these just connect 2 wires together? I don't understand the pic of the ones with 2 round holes on top?

Accepted Answer

The  two round  holes are for the screws that clamp down on the wires.   I prefer those to the spring ones, as the connection is more secure, both physically and electrically.  The spring ones can melt with too much current,  but they are more convenient  for making the splice.  In both cases they connect two wires together end to end.

Question 2

What gauge wires do these accomodate?

Accepted Answer

22 gauge(solid) is ideal, 14 gauge max. Keep in mind I'm pretty sure these connectors are designed for hobby applications using no more than wall wart power supplies, maybe 300 watts max?

Question 3

what's the AWG rating on this?

Accepted Answer

I agree with others, and am annoyed that the sellers don't seem to answer these questions often.  A 10A rating would likely imply a design based on 1.5 mm^2 conductor and therefore approximately 16 AWG as a baseline, with some tolerance.  even if a 10 AWG will 'fit',  the clamping mechanism may not work on that size and the screws may not have enough thread to tighten up if it is stuffed full.  There are similar screw terminal products that are listed (third party tested for safety) and labeled for US wire sizes in any big box store across the US.  the quick clamp version may be ok for dinking around with your arduino for some prototyping but don't look like anything I would bet my homeowners insurance on.   installing unlisted LED lights with unlisted connectors and causing a fire will make any fire insurance claim interesting to say the least.

Question 4

What wire sizes can these reasonably handle 24g, 22g, 18g, 16g, 14g, 12g?

Accepted Answer

I am using mine on 24awg but they can easily fit 12 gauge for size. However I’m not sure if they are rated for power on a 12awg wire.

ASIN	B07283L2QS
Best Sellers Rank	#184,862 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #281 in Screw Terminals
Brand Name	Rustark
Color	White
Connector Type	Screw
Current Rating	10 A
Customer Reviews	4.4 4.4 out of 5 stars (353)
Item Weight	9.92 ounces
Manufacturer	Findfly
Material Type	Plastic, Pvc
Model	43237-2
Mounting Type	surface
Number Of Contacts	240
Number Of Poles	2
Number of Items	100
Number of Packs	1
Number of Positions	110
Part Number	43237-2
Specification Met	CE, IEC, UL
UPC	759981358579
Unit Count	100 Count
Upper Temperature Rating	150 °C
Voltage	250 volts, 380 volts

100Pcs 2P CH2 + 3P CH3 Quick Connector Spring Wire Connector Screw Terminal Barrier Block for LED Strip Light Wire Connecting - 4 Styles

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