I think it takes a different temperament to deal with wrestling a 500 kcmil into a lug than it does to finesse a 24 AWG without untwisting or overbending it.
I agree with that, I am a telcom guy and former EC. I can handle a small data installation but I would go out of my mind if I had to terminate hundreds of CAT6 jacks.
Also, you really can't lump all LV together. LV is made up of many separate and very specialized trades such as data, telecom, CATV, audio, etc,etc. Being proficient at one does not mean the person knows anything about another.
The NEC tries to cover all of LV with the singular objective of providing a safe installation. Following its requirements does not in any way mean that the installation is technically correct or even that it will work. The NEC only provides the minimum requirements so that the installation will not harm people or property. Consequently, any licensing only grants that the person who passed the test has a working knowledge of the Code requirements. A license should not be viewed as a license to do such work, only that you know how to do it safely.
Unfortunately there are some who think holding a license means that they are competant to do whatever it covers.
-Hal
