You can't just add arbitrary HTML at the top of a module file - Drupal runs through a process to theme the page, and you need hook into that.

You have a couple of options:


Override html.tpl.php in your theme, and add the tag to the &lt;head&gt; section manually. This is probably the easiest way.
Use drupal_add_html_head() in your module, e.g.

$tag = $element = array(
  '#tag' =&gt; 'meta', 
  '#attributes' =&gt; array(
    'http-equiv' =&gt; 'X-UA-Compatible',
    'content' =&gt; 'IE=edge',
  ),
);
drupal_add_html_head($tag, 'mymodule:ua_compatibility');



Make sure you pick an appropriate hook to do this in (preprocess_page, etc), don't just add it to the top of the file or it won't work.

Ajax HTTP error occured. HTTP Result code: 200
I'm trying to figure out what is considered a power line( for outlets) and data communication line.
What are the qualifying factors here.
I know
outlets have 120V AC at 60Hz
and data lines have anything around 0 to 12V, but I don't know how much current that allows.

so

What is the current limit for the Data line?
What is the voltage limit for the Data line?

I would expect that results can vary based on where to you live.
I live in Utah, USA
