Electrotechnical article

摘要

An electrical module for carrying electrical components is plugged into an opening in the wall of electrical apparatus, preferably from the inside. Mounting grooves on either side of the module engage corresponding edges of the wall opening in response to lateral movement which overcomes elastically yielding structure on the groove bottom of one side comprises latching structure for stably affixing the module in place in the opening so that entry from the outside of the electrical apparatus is precluded.