A wet grinder requires an isolating transformer.The secondary socket on the isolating transformer must not be used to connect an extension cord, for branching-off or power distribution. Alternatively, the use of a residual-current-operated circuit breaker is possible.The operation of a wet grinder with an operating voltage of 110 volts should be preferred at all times to a tool with an operating voltage of 220 V. Isolating transformers are available for both operating voltages, this also applies to wet grinders.
Wood is a grown material with a structure and texture which has to be taken into account during processing and the production of pre-fab wood components (grain direction, sapwood/heartwood etc.). Waste products from wood processing can be adequately recycled (particle board, cellulose), however they can also present a health and environmental hazard (dust and sap from various hardwood and tropical trees). Certain tropical timbers are gained by uncontrolled cutting and ruthless exploitation of the forests which can turn whole regions into deserts and change the local climate. Increasingly so-called substitute timbers are being introduced with similar properties as tropical timbers which, however, are easier to cultivate.