If the inner conductor wires don t have broken insulation then duct tape may work for a while.
Is duct tape ok for electrical wires.
This article compares duct tape vs electrical tape.
Is duct tape safe to use for electric wires.
Duct tape was invented in the 1920s by richard drew who worked for minnesota mining manufacturing co known today as 3m.
Duct tape is used for almost every conceivable taping job even for making hats.
If the machine has a retractable cord then a good repair with electrical vinyl tape may interfere with the retraction.
As far as i know most duct tape is primarily polyethylene or vinyl and most electrical tape is primarily vinyl but i d be more concerned about the threads in the duct tape or the different adhesives.
Though if it got chewed in a power head then wires inside could be broken as well.
Duct tape or duck tape compared to electrical tape.
It is important to note they are designed for entirely different uses.
You need to use the one best suited for the job.
In addition to standard black electrical tape comes in a rainbow of other colors and electricians use them to code wires for future identification.
Lets take a look.
It is waterproof and was originally used for keeping moisture out of ammunition cases.