Many wires on the same terminal

[carealtor]

How do you professional installers deal with a large numbers of wires that go to the same terminal?  I have a VERY modest Vista 20P system that I am working with.  Even with my VERY modest setup, I have a dozen or so ground wires under terminal 4.  An extra terminal strip comes to mind, but I would like to hear advise from any professional installers.

 

[RAL]

How do you professional installers deal with a large numbers of wires that go to the same terminal?  I have a VERY modest Vista 20P system that I am working with.  Even with my VERY modest setup, I have a dozen or so ground wires under terminal 4.  An extra terminal strip comes to mind, but I would like to hear advise from any professional installers.

 
Usually, you don't want to put more than a couple of wires under a screw terminal like those on the 20P. 
 
The most straight forward thing to do is use a wire nut to connect all the incoming wires together, along with a pigtail that connects to the screw terminal.  It isn't the prettiest way to do it, but doesn't take up a lot of space the way a terminal block would.

 

[wuench]

I use terminal blocks.

 

[drvnbysound]

I have some of these:
 

 

[carealtor]

I like those.  What are they?  A link would be appreciated.
 
 
 
Never mind.  I found them.

 

[RAL]

Some folks use DIN mount terminal blocks, like these.
 
http://www.ebay.com/itm/122032952483
 

 
Technical Data (UL)
Rated Voltage: 600V
Rate Current: 20A
Conductor Cross-section, Solid (AWG): 22-12
Conductor Cross-section, Flexible (AWG): 22-12
Rated Impulse Withstand Voltage: 6KV
Torque (N-m): 0.4
Screw: M2.5
Wire Strip Length: 9-11mm
Insulating Material: PA
TxHxW (mm): 5.1 x 39.6 x 40.5 (Individual Blocks)
DIN Rail (mm): 35, 32
Jumper/Bridge: Press-fit/Insertion
 
This assembly includes 10 DK2.5N Dinkle terminal blocks, 2 SS2 end brackets, 1 DK4NC end cover, and a DSS2.5N-10P press-fit jumper, all mounted on a 5" piece of aluminum RoHS rail.  The 10 gauge inputs are all in common. 
 
The redish/purple strip in the middle is a jumper bar that connects all the sections together.