Okay, I am not getting any done in lab today
From the the tropical tank discussion forum, where this same topic was discussed on March 20, 2002, posted by moderator, Stang97:
I called and talked with Ebo Jager. They said that depending on where the unit is sold, the government requires them to be UL approved if they want to be able to sell it as a "submergable" unit. They said there is no difference between the models with and without this labeling and it is only to comply with the laws in those areas. They said it was ok to go ahead and completely submerse the unit in the water.
BigAl's is in Canada and they are one of the countries that require the UL rating so that is why since we both bought one from them they came with this wording imprinted.
One year later (April 2, 2003), Stang97 wrote the following:
Yup, if you go and buy an Ebo-Jager in the states at one of your local pet shops it will more than likely not have that warning on it. It's only due to BigAl's being located in Canada and the local government requiring the warning to be labeled on the units.
Trust me Ebo was just as confused about it as I was when I talked with them. They agreed that it didn't make any sense but was the only way that they could be allowed to export to Canada.
I hate to take from other boards, but I could not find a number specifically for Ebo Jager and making international calls from the lab is frowned upon!