What are the safety precautions when using an extension cord with the MF1538C?

As a general rule, extension cords should not be used with this machine. If an extension cord must be used, use one rated for the local voltage or higher, untie any cord binding, and insert the power plug completely to ensure a firm connection. Do not plug multiple cords together into an extension cord, as this may cause a fire or electrical shock. (Page 14)