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Resistance welding is commonly used in many branches of industry. To perform the welding process high welding currents up to about 100 kA are required which are supplied by dedicated power electronic converters in pulsed power operation. Concerning electromagnetic compatibility (EMC) aspects of such equipment the new European standard EN 50240 has to be taken into account. In the paper adapted noise mitigation measures representing an alternative to costly and bulky power-line interference suppression filters are discussed. Main emphasis is laid on a special grounding system offering internal bypass paths for disturbance currents