It will be taking too much current - the most probable cause will be the motor unless you've managed to damage the cable with over enthusiastic tugging although a cable fault, although possible, is unlikely to cause a persistent fuse fault.
If it's the fuse in the machine's plug that's blowing it needs to be a 13A (Brown) fuse in the UK but a 10A fuse should be OK. Closer to 20A for 115V power.
If the plug is not a moulded-on one you might examine it to check for a stray wire fault - it does happen especially if the operator is a "tugger".
Good luck...
Peccavi, July 2009
