Welch Allyn CP 50 Plus 12-lead resting electrocardiograph - User Manual - Manual (Page 15)

Setup
Connecting the patient cable
WARNING Do not allow the conductive parts of the patient cable,
electrodes, or associated connections of defibrillation-proof applied parts,
including the neutral conductor of the patient cable and electrodes, to
come into contact with other conductive parts, including earth ground.
Otherwise, an electrical short might result, risking electric shock to patients
and damage to the device.
WARNING To avoid injury to the patient or damage to the device, never
plug patient leads into any other device or wall outlet.
CAUTION Always connect the patient cable and the leads properly during
defibrillation. Otherwise, the connected leads could be damaged.
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