Quad-plex Ampacity

[AC\DC]

Hello, I have a 400 Underground service Feeding two - 200 amp disconnects. From there they will go up a pole and split off off into a Y shape and go to two separate poles about 100 feet for each. So looks like I could use 310.20 for Messenger cables. Is that correct.

On another note, when trying to find the answer on previous post. It seems like Quad-plex does not have any insulation type like xhhw. Seems like most inspectors don't care about that.
If the supply house stocks this item, it seems as though it must be acceptable. I will probably call the county inspector to find what he thinks. Just was wondering.
This is the wire I would purchase

2A4ACSRGRUX1500 :: 2/0 PE Aluminum Overhead Cable 1800' :: PLATT ELECTRIC SUPPLY

(3) 2/0 AWG Conductor and (1) 2/0 AWG Neutral, PE Insulation, ACSR Neutral, Grullo, Aluminum Multiplexed Overhead Service or Secondary Cable, Black, 600V., Cat #: 2A4ACSRGRUX1500, Mfr: Multiple

platt.com

 

[Todd0x1]

That's expensive. $2.05/ft here

2/0-2/0-2/0-2/0 Grullo Aluminum Quadruplex Overhead Service Drop Cable

2/0,2/0,2/0,2/0 Grullo Aluminum Quadruplex Overhead Cable. Sold by the foot.

www.wireandcableyourway.com

 

[AC\DC]

Local supplier, same day delivery. Maybe once I have some space, I will buy rolls of this stuff.
Is my thought on 310.20. correct

 

[ppsh]

Aerial triplex/quadplex isn't a listed chapter 3 wiring method. However table 396.10(A) contains

Other factory-assembled, multiconductor control, signal, or power cables that are identified for the use

It meets the definition of identified.