Just because it doesn't come with one doesn't mean there is a problem
with using a plugtop. A gas hob doesn't come with a fitted plug, and
neither does a cooker hood and these draw a few watts each.
--
Thats because they are fixed appliance's and needs to be wired via a FCU the
only exception that comes to mind is a electric clock thats permitted on a
designed for purpose plug connector.

Peter