- Electric devices should not be kept in proximity of splashing water.
- Defects on cables, plugs and devices should be repaired immediately by a professional.
- Protective devices should not be bypassed or modified.
- Devices which for some reason cannot be grounded should be connected to an isolating transformer, or protected by a fault current circuit breaker.
- Before any intervention on the device, unplug the power cable. Beware of capacitors, which can retain their charge for a long time.