New Combiner and I new to Lengthen/Splice my PV wire

[MrM1]

Decided to go with these inside appropriate box types for wire transitions (solar wire to MC) and splices. Seemed simple enough, reusable and designed for the purpose.

 

[Crowz]

Decided to go with these inside appropriate box types for wire transitions (solar wire to MC) and splices. Seemed simple enough, reusable and designed for the purpose.

View attachment 150363

Thats what I just installed monday.

I bought that one you linked first and they sent a box of 50 yellow connectors with no rail or ends. I'm sending it back.

I ordered again and noticed this one :

https://www.amazon.com/dp/B07NVVP9X7?psc=1&ref=ppx_yo2ov_dt_b_product_details

It was $1 cheaper and had a ton more stuff to it. I likes it

 

[Crowz]

The green ones are for grounding the rails if you want.

 

[MrM1]

I could not find kits for the DK6N only the DK4N. The DK6N does 8 awg, the DK4N does not. I needed up to 8 awg

 

[Crowz]

I could not find kits for the DK6N only the DK4N. The DK6N does 8 awg, the DK4N does not. I needed up to 8 awg

I got lucky on this since I was combining the small wires from the power supply on the orange pi 3 lts thats running solar assistant and the power for the surveillance cameras and such.

I may get a larger one for the larger stuff but I crimped that stuff already and did the traditional bus bars for those.

 

[Shimmy]

Decided to go with these inside appropriate box types for wire transitions (solar wire to MC) and splices. Seemed simple enough, reusable and designed for the purpose.

Right approach, as long as you check on them periodically. Personally I have seen miserable safety results in the past with crimp or set-screw butt splices. The only thing we ever allowed was compression butt splices on 4/0 or larger; we replaced small wires.

Mechanical splices have a way of being forgotten and working themselves loose. This is especially true for connections that cycle from zero to a continuous >60% load daily.

 

[MrM1]

Right approach, as long as you check on them periodically. Personally I have seen miserable safety results in the past with crimp or set-screw butt splices. The only thing we ever allowed was compression butt splices on 4/0 or larger; we replaced small wires.

Mechanical splices have a way of being forgotten and working themselves loose. This is especially true for connections that cycle from zero to a continuous >60% load daily.

I'm assuming "mechanical" also means the connection point at the breaker ?

 

[Quattrohead]

Box and wire nuts are perfectly fine.
When I first came to the USA, wirenuts frightened me to death and made me laugh all at the same time but over the years I have come to appreciate them immensely. Done properly they are one of the safer connection methods available.

 

[MrM1]

Box and wire nuts are perfectly fine.
When I first came to the USA, wirenuts frightened me to death and made me laugh all at the same time but over the years I have come to appreciate them immensely. Done properly they are one of the safer connection methods available.

Even for high voltage DC? (or does it AC / DC even matter)

 

[Shimmy]

I'm assuming "mechanical" also means the connection point at the breaker ?

The breaker connection is generally easier to inspect though. Few places inspect splices unless they have had a problem with them.

 

[Shimmy]

Even for high voltage DC? (or does it AC / DC even matter)

If they are made up properly it won't matter. But, if they are loose or have eccentric strain then internal arcing seems possible and higher risk with DC IMO. I don't think voltage matters much below 600V.