Originally Posted by RainmanP
vr, are you talking about a grommet or something a little more weather resistant?
Raymond
Raymond,
No it's actually a plug that you add to a junction box like the one you bought.
You drill the box to match the plug size. Then just thread the line through the sleeve of the plug (and of course make your connectins inside the box). As you cinch the plug to the box inside of the sleeve clamps down on the wire making a waterpoof seal.
They're pretty standard equipment for meters and such. You can also get 'em in the plumbing department for protecting jacuzzi tubs. I think they call them cord seals. See attachment.
http://www.zoeller.com/zcopump/zcopdfdocs/FM1597.pdf