Question 1

do you have a version of this for 8-10 ga landscape wire, or can this be installed in a waterproof box?

Accepted Answer

We have a lot of customers who install these in waterproof boxes.  If you are using 8 to 10 AWG wire, this block is probably more than what you require.  If you go 2 sizes down, you can use the Dinkle DK10N 20-6AWG and rated up to 60 amps.  
Kindest regards,
Clayton
International Connector, Inc.

Question 2

I need to splice two Romex 6/3 together using this instead of split bolts, would it be a good idea? Is it slotted or hex screw? Which enclosure fits?

Accepted Answer

Yes, you can use this block to combine wires between 1/0 and 12AWG.  If you need to combine more than 2 wires, I suggest using the DSS35N-02P jumpers.  I have added the Amazon link below.  The elevator cage screws are slotted.  At this time, we do not sell or have a recommended boxes.  These blocks are 16mm by 60.3mm by 55.4mm, so they fit in most boxes just fine. 
https://www.amazon.com/dp/B07Y5NGZ7C?ref=myi_title_dp
Kindest regards,
Clayton
International Connector, Inc.

Question 3

I have 250A split to two wires for 125A each, does it work?

Accepted Answer

This DK35N block is UL recognized for 150A, so you wouldn't be able to bring in 250A.  The DK150 would be an option because it can handle 275A.  That is something we would have to order for you.  How many are you looking for?
Kindest regards,
Clayton
International Connector, Inc.

Question 4

Please clarify: illustration shows one piece with five pairs of screw type terminals. In fact there are 5 physically separate terminal blocks?

Accepted Answer

There are 5 DK35N terminal blocks in that picture.  That is exactly what you will receive.  Each block has a terminal on each side in elevator-cage screw-down style.  These blocks need to be mounted on 35mm DIN rail.  They accept DSS35N-02P jumpers to be electrically connected.
Kindest regards,
Clayton
International Connector, Inc.

ASIN	B07XH4LPGG
Best Sellers Rank	#38,199 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #39 in Ground Circuit Terminal Blocks
Brand Name	International Connector
Centerline Length	16 millimeters
Color	Beige
Connector Type	Screw
Current Rating	150 A
Customer Reviews	4.8 out of 5 stars 64 Reviews
Included Components	Terminal Blocks
Item Dimensions W x H	2.18"W x 2.18"H
Item Pitch	16 millimeters
Manufacturer	Dinkle
Material	Copper
Material Type	Copper
Model	DK35N(5)
Mounting Type	din_rail
Number Of Contacts	10
Number Of Poles	5
Number of Items	5
Number of Positions	175
Part Number	DK35N(5)
Pitch	16 millimeters
Specification Met	IEC, UL, cUL
UPC	737123111589
Unit Count	5 Count
Upper Temperature Rating	70 °C
Voltage	600 volts

Dinkle DK35N DIN Rail Terminal Block Screw Type UL 600V 150A 1/0-12AWG, Pack of 5

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