Lock horizontal dimentions of a cell in a table (HTML)

Does anyone know how to set the horizontal size of a table (and all of it's cells) to set set value so that, if your text reaches it's border it doesn't cause the table to expand, but instead begins a new line?

Here's the code of my table so far.

<table width="619" height="30" border="1">
<tr>
<td>&nbsp;</td>
</tr>
</table>

EDIT: I'm using Dreamweaver