Originally Posted by Phane
...the installer told me...it's state code in Minnesota that you only have to ground the coax and it doesn't need to be grounded outside and that grounding the coax grounds the whole system anyway.
Is this installer giving me the runaround or is only grounding the coax to my junction boxes ground wire adequate?
Beats me! The Model National Electrical Code, which forms the basis for nearly all state and local codes, is not a public document. It is a law that is owned by a private agency. I know that is nonsense, but that is the way that it is. I bought my last one in 2008 or 2011; I don't remember which. I think paid $60 for it, but the book I bought had black printing on a gray background and was so difficult to read that I gave up on it. We had found and posted a link to the 2014 revision over at DBSTalk, and while I don't know how I'd even find it, it could be disabled by now.
Basically, each state enacts a statute that says that its electrical code is now the 2011 or 2014 edition of the NEC, with the following exceptions:
I just googled for the Minnesota electrical code and here is what I found:
Status Code 403: Your Request Has Been Denied This Document Is Not Currently Available To You
Dear Fellow Citizen:
You have been denied permission to access this document at this time due to ongoing judicial proceedings in the following case: American Society for Testing and Materials ( ASTM ), National Fire Protection Association ( NFPA ), and American Society of Heating. Refrigerating, and Air-Conditioning Engineers ( ASHRAE ) v. Public.Resource.Org (Public Resource ), DCD 1:13-cv-01215, U.S. District Court for the District of Columbia 
Your access to this document, which is a law of the United States of America, has been temporarily disabled while we fight for your right to read and speak the laws by which we choose to govern ourselves as a democratic society.
So that tells me the world is still as nutty as it was the last time I checked.
It is possible that what your installer told you is accurate. Frankly, many people doubt the usefulness of grounding a mast that supports a an antenna. Supposedly, it drains off static electricity which otherwise makes it a more inviting target to lightning. Many physics professors disagree with that. We "professionals" only ground masts so that we will not be penalized for not grounding a mast when we have been paid to do so.
You probably can find out what your local code "requires" by calling your municipal inspector's office, but there typically is no enforcement of such a requirement and no penalty for non-compliance. You have a better chance of getting arrested by the mattress tag police.
You can also find he Model NEC in your public library. The sections you would be looking for are 810 and 820, but that won't tell you the whole story. You would then have to find the state statute adopting the NEC to see what exceptions they have placed on that adoption. States with lousy soil sometimes make rules that are more demanding, states with little lightning sometimes exempt certain model code requirements.
If you care, I'm sure your installer will ground it for you if you pay him to do so. I wouldn't bother... and I have installed over a thousand antennas in my lifetime.